Journal articles: 'Corrosion ; Magnesium ; Magnesium alloys'

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Lv, Yang Yang, and Ling Feng Zhang. "Corrosion and Protection of Magnesium Alloys." Advanced Materials Research 1120-1121 (July 2015): 1078–82. http://dx.doi.org/10.4028/www.scientific.net/amr.1120-1121.1078.

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Magnesium alloy as a green material in the 21st century, because of its excellent physical and mechanical properties of metallic materials as an ideal in the automotive industry, electronic industry and aviation, aerospace and other industries[1]. However, poor corrosion resistance of magnesium alloys become an important issue hinder application of magnesium alloys[2]. So magnesium alloy corrosion problems and the current status of research paper reviews several magnesium alloy protection methods at home and abroad, and also highlighted with our latest laser shock (LSP) study of AZ91 magnesium alloy at high strain rates of corrosion resistance results.

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Bolle, Andrea. "A Review of Magnesium/Magnesium Alloys Corrosion." Recent Patents on Corrosion Science 1, no. 2 (May 18, 2011): 72–79. http://dx.doi.org/10.2174/2210687111101010072.

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Wei Guo, Kelvii. "A Review of Magnesium/Magnesium Alloys Corrosion." Recent Patents on Corrosion Sciencee 1, no. 1 (June 1, 2011): 72–90. http://dx.doi.org/10.2174/2210683911101010072.

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Jian, Shun-Yi, Mei-Ling Ho, Bing-Ci Shih, Yue-Jun Wang, Li-Wen Weng, Min-Wen Wang, and Chun-Chieh Tseng. "Evaluation of the Corrosion Resistance and Cytocompatibility of a Bioactive Micro-Arc Oxidation Coating on AZ31 Mg Alloy." Coatings 9, no. 6 (June 20, 2019): 396. http://dx.doi.org/10.3390/coatings9060396.

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Magnesium alloys have recently been attracting attention as a degradable biomaterial. They have advantages including non-toxicity, biocompatibility, and biodegradability. To develop magnesium alloys into biodegradable medical materials, previous research has quantitatively analyzed magnesium alloy corrosion by focusing on the overall changes in the alloy. Therefore, the objective of this study is to develop a bioactive material by applying a ceramic oxide coating (magnesia) on AZ31 magnesium alloy through micro-arc oxidation (MAO) process. This MAO process is conducted under pulsed bipolar constant current conditions in a Si- and P-containing electrolyte and the optimal processing parameters in corrosion protection are obtained by the Taguchi method to design a coating with good anti-corrosion performance. The negative duty cycle and treatment time are two deciding factors of the coating’s capability in corrosion protection. Microstructure characterizations are investigated by means of SEM and XRD. The simulation body-fluid solution is utilized for testing the corrosion resistance with the potentiodynamic polarization and the electrochemical impedance test data. Finally, an in vivo testing shows that the MAO-coated AZ31 has good cytocompatibility and anticorrosive properties.

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Ohse, T., Harushige Tsubakino, and Atsushi Yamamoto. "Surface Modification on Magnesium Alloys by Coating with Magnesium Fluorides." Materials Science Forum 475-479 (January 2005): 505–8. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.505.

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A new technique has been developed for improving corrosion resistance on magnesium alloys. Specimens of AZ31 magnesium alloy were dipped into molten salt of NaBF4 at 723 K for various times, and then cooled, rinsed with water, and dried in air. Corrosion resistance in the surface treated specimens was evaluated by salt immersion test using 1 % NaCl solution as a time for occurring filiform corrosion. On an un-treated AZ31 alloy, the time for starting the filiform corrosion was about 1.2 ks, while on the surface treated specimen, the time was prolonged into about 1300 ks. Moreover, the surface treated specimen showed corrosion resistance in low pH solutions, such as 1 % HNO3 and HCl solutions.

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Tsubakino, Harushige, Atsushi Yamamoto, K. Sugahara, and Shinji Fukumoto. "Corrosion Resistance in Magnesium Alloys and Deposition Coated Magnesium Alloy." Materials Science Forum 419-422 (March 2003): 915–20. http://dx.doi.org/10.4028/www.scientific.net/msf.419-422.915.

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Tan, Jovan, and Seeram Ramakrishna. "Applications of Magnesium and Its Alloys: A Review." Applied Sciences 11, no. 15 (July 26, 2021): 6861. http://dx.doi.org/10.3390/app11156861.

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Magnesium is a promising material. It has a remarkable mix of mechanical and biomedical properties that has made it suitable for a vast range of applications. Moreover, with alloying, many of these inherent properties can be further improved. Today, it is primarily used in the automotive, aerospace, and medical industries. However, magnesium has its own set of drawbacks that the industry and research communities are actively addressing. Magnesium’s rapid corrosion is its most significant drawback, and it dramatically impeded magnesium’s growth and expansion into other applications. This article reviews both the engineering and biomedical aspects and applications for magnesium and its alloys. It will also elaborate on the challenges that the material faces and how they can be overcome and discuss its outlook.

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Tkacz, J., K. Slouková, J. Minda, J. Drábiková, S. Fintová, P. Doležal, and J. Wasserbauer. "Corrosion behavior of wrought magnesium alloys AZ31 and AZ61 in Hank’s solution." Koroze a ochrana materialu 60, no. 4 (December 1, 2016): 101–6. http://dx.doi.org/10.1515/kom-2016-0016.

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Abstract Corrosion behavior of wrought magnesium alloys AZ31 and AZ61 was studied in Hank’s solution. Potentiodynamic curves measured after short-term of exposure showed higher corrosion resistance of AZ31 magnesium alloy in comparison with AZ61 magnesium alloy. On the contrary, long-term tests measured by electrochemical impedance spectroscopy showed higher corrosion resistance of AZ61 magnesium alloy in comparison with AZ31 magnesium alloy.

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Chmiela, Bartosz, Adrian Mościcki, and Maria Sozańska. "Application of Electron Microscopy to Investigation of Corrosion of Mg-Al Alloys in Various Electrolyte Solutions." Solid State Phenomena 231 (June 2015): 41–47. http://dx.doi.org/10.4028/www.scientific.net/ssp.231.41.

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The Mg-Al alloys are the best-known and most commonly used magnesium alloys (especially AZ91 alloy). However, the AZ91 alloy offers insufficient corrosion resistance. Many investigations show that hydrogen is the main corrosive factor appearing during chemical reactions between magnesium and water in electrolyte solution. The main intermetallic phase in the AZ91alloy is the Mg17Al12 (β phase), which is a hydrogen trap. During corrosion, magnesium hydride forms inside the β phase, and this phase is brittle fractured when the inner stress caused by hydrogen pressure and expansion stress due to the formation of magnesium hydride is higher thanthe fracture strength. We examined the corrosion behaviour of AZ91 and AE44 magnesium alloysin 0.1M Na2SO4 solution and 3.5% NaCl solution. We analysed two Mg-Al alloys in order todetermine the various effects of hydrogen on these materials.

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Xu, Jinkai, Qianqian Cai, Zhongxu Lian, Zhanjiang Yu, Wanfei Ren, and Huadong Yu. "Research Progress on Corrosion Resistance of Magnesium Alloys with Bio-inspired Water-repellent Properties: A Review." Journal of Bionic Engineering 18, no. 4 (July 2021): 735–63. http://dx.doi.org/10.1007/s42235-021-0064-5.

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AbstractThanks to its excellent mechanical properties, magnesium alloys have many potential applications in the aerospace and other fields. However, failure to adequately solve corrosion problems of magnesium alloy becomes one of the factors restricting its wide use in many industrial fields. Inspired by nature, researchers designed and fabricated bio-inspired water-repellent (superhydrophobic and slippery liquid-infused porous surface) surfaces with special wetting properties by exploring the surface microstructures of plants and animals such as lotus leaf and nepenthes pitcher, exhibiting excellent corrosion-resistant performance. This article summarizes the research progress on corrosion resistance of magnesium alloys with bio-inspired water-repellent properties in recent years. It mainly introduces the corrosion reasons, types of corrosion of magnesium alloys, and the preparation of magnesium alloys with bio-inspired water-repellent properties to improve corrosion resistance. In particular, it is widely used and effective to construct water-repellent and anti-corrosion coating on the surface of magnesium alloy by surface treatment. It is hoped that the research in this review can broaden the application range of magnesium alloys and provide a powerful reference for the future research on corrosion resistance of magnesium alloys.

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Azlina, O. Saliza, Mohd Shafiq Ruba’ai, and D. Kurniawan. "EFFECT OF MAGNESIUM FLUORIDE COATING ON CORROSION BEHAVIOR OF MAGNESIUM ALLOY." Materials and Corrosion Engineering Management 1, no. 1 (June 20, 2020): 13–16. http://dx.doi.org/10.26480/macem.01.2020.13.16.

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Magnesium and its alloys are explored as potential biomedical materials for being lightweight, bio-absorbable, and having attractive biological properties. A major hindrance for their use is their high corrosion rate, in particular when exposed to body fluids. This study aims at suppressing the corrosion rate of a magnesium alloy (Mg1.0Ca) by coating it with magnesium fluoride (MgF2). The coating was done by immersion of the work-piece in hydrofluoric acid solution. For comparison, pure magnesium was also coated with MgF2. The MgF2 coated magnesium exhibits significantly lower corrosion rate than pure magnesium. The MgF2 coated magnesium alloy shows even lower corrosion rate. The MgF2 coating works in inhibiting corrosion on magnesium alloy Mg1.0Ca. The corrosion inhibition was also contributed by other compound formed during reaction between Mg1.0Ca and hydrofluoric acid and the alloy in Mg1.0Ca.

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Azlina, O. Saliza, Mohd Shafiq Ruba’ai, and D. Kurniawan. "EFFECT OF MAGNESIUM FLUORIDE COATING ON CORROSION BEHAVIOR OF MAGNESIUM ALLOY." Materials and Corrosion Engineering Management 1, no. 1 (June 22, 2020): 13–16. http://dx.doi.org/10.26480/macem.02.2020.13.16.

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Magnesium and its alloys are explored as potential biomedical materials for being lightweight, bio-absorbable, and having attractive biological properties. A major hindrance for their use is their high corrosion rate, in particular when exposed to body fluids. This study aims at suppressing the corrosion rate of a magnesium alloy (Mg1.0Ca) by coating it with magnesium fluoride (MgF2). The coating was done by immersion of the work-piece in hydrofluoric acid solution. For comparison, pure magnesium was also coated with MgF2. The MgF2 coated magnesium exhibits significantly lower corrosion rate than pure magnesium. The MgF2 coated magnesium alloy shows even lower corrosion rate. The MgF2 coating works in inhibiting corrosion on magnesium alloy Mg1.0Ca. The corrosion inhibition was also contributed by other compound formed during reaction between Mg1.0Ca and hydrofluoric acid and the alloy in Mg1.0Ca.

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Chai, Yue Sheng, Li Na Wang, Gang Sun, Shu Li Sun, and Min Gang Zhang. "Corrosion Behavior of AZ61 Magnesium Alloys in NaCl Solution." Advanced Materials Research 239-242 (May 2011): 2240–43. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.2240.

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Magnesium alloys are used widely because of its good performance. However, its practical application is restricted by low corrosion resistance. In this study, the effects of corrosion time and NaCl concentration on the corrosion behavior of AZ61 magnesium alloy were investigated from the corrosion morphology and the corrosion rate. These results have displayed that the corrosion rate of AZ61 magnesium alloy decreases with the increasing etching time. Meanwhile, the corrosion rate of AZ61 magnesium alloy increases with the increasing sodium chloride concentration. This is mainly because that the Cl- ion in the solution destroys the protective film on the surface of magnesium alloy and the high Cl- ion concentration accelerates the corrosion rate.

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Galio, Alexandre Ferreira, Sviatlana V. Lamaka, Mikhail L. Zheludkevich, L. F. Dick, Iduvirges Lourdes Müller, and Mário G. S. Ferreira. "Evaluation of Corrosion Protection of Sol-Gel Coatings on AZ31B Magnesium Alloy." Materials Science Forum 587-588 (June 2008): 390–94. http://dx.doi.org/10.4028/www.scientific.net/msf.587-588.390.

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Magnesium is one of the lightest metals and magnesium alloys have good strength to weight ratio making them very attractive for many particular applications [1]. The main drawback of magnesium alloys is their high corrosion susceptibility. Improving the corrosion protection by deposition of thin hybrid films can expand the areas of applications of relatively cheap magnesium alloys. This work aims at investigation of new anticorrosion coating systems for magnesium alloy AZ31B using hybrid sol-gel films. The sol-gels were prepared by copolymerization of 3- glycidoxypropyltrimethoxysilane (GPTMS), titanium alcoxides and special additives which provide corrosion protection of magnesium alloy. Different compositions of sol-gel systems show enhanced long-term corrosion protection of magnesium alloy. The sol-gel coatings exhibit excellent adhesion to the substrate and protect against the corrosion attack. Corrosion behavior of AZ31B substrates pre-treated with sol–gel derived hybrid coatings was tested by Electrochemical Impedance Spectroscopy (EIS). The morphology and the structure of sol-gel films under study were characterized with SEM/EDS techniques.

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Wang, H., Zhi Ming Shi, and K. Yang. "Magnesium and Magnesium Alloys as Degradable Metallic Biomaterials." Advanced Materials Research 32 (February 2008): 207–10. http://dx.doi.org/10.4028/www.scientific.net/amr.32.207.

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Drawbacks associated with permanent metallic implants lead to the search for degradable metallic biomaterials. Magnesium alloys have been highly considered as Mg has a high biocorrosion potential and is essential to bodies. In this study, corrosion behaviour of pure magnesium and magnesium alloy AZ31 in both static and dynamic physiological conditions (Hank’s solution) has been investigated. It is found that the materials degrade fast at beginning, then stabilize after 5 days of immersion. High purity in the materials reduces the corrosion rate while the dynamic condition accelerates the degradation process. In order to slow down the degradation process to meet the requirement for their bio-applications, an anodized coating is applied and is proved as effective in controlling the biodegradation rate.

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Gayle, Jessica, and Anil Mahapatro. "Magnesium Based Biodegradable Metallic Implant Materials: Corrosion Control and Evaluation of Surface Coatings." Innovations in Corrosion and Materials Science (Formerly Recent Patents on Corrosion Science) 9, no. 1 (September 24, 2019): 3–27. http://dx.doi.org/10.2174/2352094909666190228113315.

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Background:Magnesium and magnesium alloys are currently being explored for biodegradable metallic implants. Magnesium’s biocompatibility, low density, and mechanical properties could offer advantages in the development of low-bearing orthopedic prosthesis and cardiovascular stent materials.Objective:Magnesium’s susceptibility to corrosion and increased hydrogen evolution in vivo compromises the success of its potential applications. Various strategies have been pursued to control and subsequently evaluate degradation.Methods:This review provides a broad overview of magnesium-based implant materials. Potential coating materials, coating techniques, corrosion testing, and characterization methods for coated magnesium alloys are also discussed.Results:Various technologies and materials are available for coating magnesium to control and evaluate degradation. Polymeric, ceramic, metallic, and composite coatings have successfully been coated onto magnesium to control its corrosion behaviour. Several technologies are available to carry out the coatings and established methodologies exist for corrosion testing. A few magnesium-based products have emerged in international (European Union) markets and it is foreseen that similar products will be introduced in the United States in the near future.Conclusion:Overall, many coated magnesium materials for biomedical applications are predominantly in the research stage with cardiac stent materials and orthopaedic prosthesis making great strides.

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Mościcki, Adrian, Bartosz Chmiela, and Maria Sozańska. "Corrosion of WE43 and AE44 Magnesium Alloys in Sodium Sulfate Solution." Solid State Phenomena 227 (January 2015): 91–94. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.91.

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Magnesium alloys have low density densities and high specific strengths that are comparable to steels and titanium alloys. Therefore, they are widely used as structural materials in the automotive and aerospace industries. However, the use of magnesium alloys is hindered by the fact that they offer insufficient resistance against corrosion, even in diluted electrolyte solutions. We examined alloys from the Mg-Y-RE-Zr and Mg-Al-RE systems (WE43 and AE44) that are used in the domestic and international automotive and aerospace industries. In these applications, the alloys are exposed to corrosion in environments containing electrolytes. It is commonly known that hydrogen is the main corrosive factor, appearing during chemical reactions between magnesium and water in an electrolyte solution. Selecting rare earth-containing magnesium alloys allows us to analyse the various effects of hydrogen on these materials. Hydrogen interacts with the selected alloys in a manner that depends strongly on alloy structure and chemical composition—these factors cause variations in the concentration, solubility, and diffusion rate of hydrogen in the host material. After hydrogen uptake, the cracking velocity of each alloy phase is different and is related to cracking micromechanisms. Our results show that when samples were immersed in 0.1M sodium sulfate solution, hydrogen atoms diffused into the material and enriched the intermetallic phases. With increased immersion time, magnesium hydride fractures in a brittle manner when the inner stress caused by hydrogen pressure and the expansion stress due to the formation of magnesium hydride are higher than the fracture strength.

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Mohamed, Seifeldin, Semiramis Friedrich, and Bernd Friedrich. "Refining Principles and Technical Methodologies to Produce Ultra-Pure Magnesium for High-Tech Applications." Metals 9, no. 1 (January 15, 2019): 85. http://dx.doi.org/10.3390/met9010085.

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During the last decade, magnesium-based medical implants have become the focal point of a large number of scientific studies due to their perceived favorable properties. Implants manufactured from magnesium alloys are not only biocompatible and biodegradable, but they are also the answer to problems associated with other materials like stress shielding (Ti alloys) and low mechanical stability (polymers). Magnesium has also been a metal of interest in another field. By offering superior technical and economic features in comparison to lithium, it has received significant attention in recent years as a potential battery anode alternative. Natural abundancy, low cost, environmental friendliness, large volumetric capacity, and enhanced operational safety are among the reasons that magnesium anodes are the next breakthrough in battery development. Unfortunately, commercial production of such implants and primary and secondary cells has been hindered due to magnesium’s low corrosion resistance. Corrosion investigations have shown that this inferior quality is a direct result of the presence of certain impurities in metallic magnesium such as iron, copper, cobalt, and nickel, even at the lowest levels of concentration. Magnesium’s sensitivity to corrosion is an obstacle for its usage not only in biomedical implants and batteries, but also in the automotive/aerospace industries. Therefore, investigations focusing on magnesium refinement with the goal of producing high and ultra-high purity magnesium suitable for such demanding applications are imperative. In this paper, vacuum distillation fundamentals and techniques are thoroughly reviewed as the main refining principles for magnesium.

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Kannan, M. Bobby, Carsten Blawert, and Wolfgang Dietzel. "Electrochemical Corrosion Behaviour of ZE41 and QE22 Magnesium Alloys." Materials Science Forum 690 (June 2011): 385–88. http://dx.doi.org/10.4028/www.scientific.net/msf.690.385.

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The study suggests that the rare-earths containing magnesium alloys ZE41 and QE22 exhibit a poorer corrosion resistance than the AZ80 magnesium alloy. Electrochemical experiments showed that the two rare-earths containing alloys are highly susceptible to localized corrosion. Post corrosion analysis revealed intergranular and pitting corrosion in ZE41, whereas QE22 alloy underwent only pitting corrosion.

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Gutman, Emmanuel M., Amir Eliezer, Ya Unigovski, and E. Abramov. "Corrosion Fatigue of Magnesium Alloys." Materials Science Forum 419-422 (March 2003): 115–22. http://dx.doi.org/10.4028/www.scientific.net/msf.419-422.115.

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Song, G. L., and A. Atrens. "Corrosion Mechanisms of Magnesium Alloys." Advanced Engineering Materials 1, no. 1 (September 1999): 11–33. http://dx.doi.org/10.1002/(sici)1527-2648(199909)1:1<11::aid-adem11>3.0.co;2-n.

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Chakraborty Banerjee, Parama, Saad Al-Saadi, Lokesh Choudhary, Shervin Eslami Harandi, and Raman Singh. "Magnesium Implants: Prospects and Challenges." Materials 12, no. 1 (January 3, 2019): 136. http://dx.doi.org/10.3390/ma12010136.

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Owing to their suitable mechanical property and biocompatibility as well as the technological possibility of controlling their high corrosion rates, magnesium and its alloys have attracted significant attention as temporary bio-implants. Though the ability of magnesium to harmlessly biodegrade and its inherent biocompatibility make magnesium alloys a suitable choice for a temporary implant, their high corrosion rates limit their practical application, as the implants can potentially corrode away even before the healing process has completed. Different approaches, such as alloying, surface modification, and conversion coatings, have been explored to improve the corrosion resistance of various magnesium alloys. However, the corrosion behavior of magnesium implants with and without a surface modification has been generally investigated under in-vitro conditions, and studies under in-vivo conditions are limited, which has contributed to the lack of translation of magnesium implants in practical applications. This paper comprehensively reviews the prospects of magnesium alloy implants and the current challenges due to their rapid degradation in a physiological environment. This paper also provides a comprehensive review of the corrosion mitigation measures for these temporary implants.

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Hua, Xian Yang, Mei Feng He, and Xiao Qin Zhou. "Preparation and Characterization of Polylactic Acid Coating on the Surface of Magnesium Alloy." Materials Science Forum 814 (March 2015): 132–36. http://dx.doi.org/10.4028/www.scientific.net/msf.814.132.

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Magnesium is one of the elements necessary for the body, is the man behind the body’s content of potassium ions within the cell are involved in a series of metabolic processes in vivo, including the formation of bone cells , acceleration of bone healing ability. Resulting from the good mechanical properties and biocompatibility, magnesium alloy is used in medical intervention material, but the high corrosion rate of magnesium alloys is the main drawback to their widespread use, especially in biomedical applications. There is a need for developing new coatings that provide simultaneously corrosion resistance and enhanced biocompatibility. In this work the medical magnesium alloy surface are dipped and coated with polylactic acid, so that obtain a dense uniform polylactic acid coating. And the corrosion resistance of the coating is studied in order to obtain controlled degradable and corrosion resisted magnesium alloy biological material. This paper mainly studies the influence of different concentrations of polylactic acid coating on AZ91D magnesium alloy corrosion resistance. The coated samples were immersed in Hank’s solution and the coating performance was studied by electrochemical impedance spectroscopy and scanning electron microscopy. This research is about the influence of the coating on the corrosion resistance of magnesium alloy through the open circuit potential, polarization curves, electrochemical impedance spectroscopy and Mott-Schottky. The results confirmed that the polylactic acid slow down the corrosion rate of AZ91D magnesium alloys in Hank’s solution. And along with the increase of poly lactic acid concentration, the corrosion resistance of magnesium alloys is improved. There is a wide variation of the corrosion morphology magnesium alloy AZ91D specimens after the surface modification using polylactic acid coating, compared with the unmodified.

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Zainal Abidin, Nor Ishida, Darren Martin, and Andrej Atrens. "Magnesium Corrosion in Different Solutions." Materials Science Forum 690 (June 2011): 369–72. http://dx.doi.org/10.4028/www.scientific.net/msf.690.369.

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The corrosion mechanism of Mg alloys in Hank’s solution was elucidated by comparing the corrosion of typical Mg alloys (AZ91, ZE41 and Mg2Zn0.2Mn) and high purity Mg in Hank’s solution at room temperature and in 3% NaCl saturated with Mg(OH)2. Corrosion was characterised by the evolved hydrogen and the surfaces after the immersion tests. Corrosion in Hank’s solution was weakly influenced by microstructure in contrast to corrosion in the 3% NaCl solution, where second phases cause strong micro-galvanic acceleration. This is attributed to the formation of a more protective surface film in Hank’s solution, causing extra resistance between the alpha-Mg matrix and the second phase. The incubation period in Hank’s solution was alloy dependent.

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Yang, Xu, Fu Sheng Pan, and Ding Fei Zhang. "A Study on Corrosion Inhibitor for Magnesium Alloy." Materials Science Forum 610-613 (January 2009): 920–26. http://dx.doi.org/10.4028/www.scientific.net/msf.610-613.920.

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With the aim of evaluating corrosion inhibition for various inhibitors, a new qualitative method for corrosion inhibition effect test for magnesium and magnesium alloys was developed. The change of polarization current density of AZ61 magnesium alloy in electrochemical polarization experiments in alkali aqueous solution with 5mmol/L sodium dodecylsulphate(SDS), phytic acid(PA), ethylenediamine tetraacetic acid(EDTA), p-nitro-benzene-azo-resorcinol(PNBAR), acidum tannicum(AT) or stearic acid(SA) were tested. The SEM-EDS techniques and deposition experiment method were used for further confirmation of the corrosion inhibition. The results showed that those organic compounds which could form the inhibitor-magnesium precipitation in aqueous solution could be used as corrosion inhibitors for magnesium alloys to inhibit the increase of polarization current density as well as the dissolution and oxidation of magnesium alloys effectively.

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Kiełbus, Andrzej, Joanna Michalska, and Bartłomiej Dybowski. "The Electrochemical and Immersion Corrosion of Casting Magnesium Alloys Containing Rare Earth Elements." Solid State Phenomena 227 (January 2015): 79–82. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.79.

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<p>Magnesium alloys are widely used mainly in automotive and aerospace industries. There is quite a lot of information about corrosion of the magnesium alloys in available literature. However, the publications concern mainly Mg-Al alloys, while there is a lack of information about Mg-RE-Zr alloys. The following paper presents results of the investigations on the electrochemical corrosion of magnesium casting alloys containing rare earth elements (WE43, WE54, EV31A-Elektron 21) as well as pure magnesium. The alloys were investigated by immersion test in 3.5% NaCl for times up to 7 days. Electrochemical investigations were carried out at ambient temperature in aerated NaCl solution, using potentiodynamic polarization method. It has been shown that the best corrosion resistance is exhibited by alloys with yttrium addition (WE43, WE54), while the weakest by pure magnesium. EV31A alloy exhibits the highest corrosion rate during the immersion test, while WE54 and WE43 alloys had a similar corrosion behavior.</p>

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Kazanski, Barbara, Alex Lugovskoy, Ohad Gaon, and Michael Zinigrad. "Comparison of Electrochemical and Chemical Corrosion Behavior of MRI 230D Magnesium Alloy with and without Plasma Electrolytic Oxidation Treatment." Defect and Diffusion Forum 364 (June 2015): 27–34. http://dx.doi.org/10.4028/www.scientific.net/ddf.364.27.

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Magnesium is one of the lightest metals and magnesium alloys have quite special properties, interest to which is continuously growing. In particular, their high strength-to-weight ratio makes magnesium alloys attractive for various applications, such as transportation, aerospace industryetc. However, magnesium alloys are still not as popular as aluminum alloys, and a major issue is their corrosion behavior.The present research investigated the influence of the PEO treatment on the corrosion behavior of MRI 230M magnesium alloy. Plasma electrolytic oxidation (PEO) of an MRI 230M alloy was accomplished in a silicate-base electrolyte with KF addition using an AC power source.The corrosion behavior of both treated and untreated samples was evaluated by open circuit potential (OCP) measurements, electrochemical impedance spectroscopy (EIS), linear polarization tests, linear sweep voltammetry (Tafel extrapolation) and chemical methods, such as mass loss and hydrogen evolution, in neutral 3.0 wt% NaCl solution.According to the tests results, PEO process can affect the corrosion resistance of MRI 230M magnesium alloy, though its action is not always unambiguous. An attempt to explain the influence of the PEO treatment on the corrosion behavior of the alloy is presented.

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Kuśnierczyk, Katarzyna, and Michał Basista. "Recent advances in research on magnesium alloys and magnesium–calcium phosphate composites as biodegradable implant materials." Journal of Biomaterials Applications 31, no. 6 (July 9, 2016): 878–900. http://dx.doi.org/10.1177/0885328216657271.

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Magnesium alloys are modern biocompatible materials suitable for orthopaedic implants due to their biodegradability in biological environment. Many studies indicate that there is a high demand to design magnesium alloys with controllable in vivo corrosion rates and required mechanical properties. A solution to this challenge can be sought in the development of metal matrix composites based on magnesium alloys with addition of relevant alloying elements and bioceramic particles. In this study, the corrosion mechanisms along with corrosion protection methods in magnesium alloys are discussed. The recently developed magnesium alloys for biomedical applications are reviewed. Special attention is given to the newest research results in metal matrix composites composed of magnesium alloy matrix and calcium phosphates, especially hydroxyapatite or tricalcium phosphate, as the second phase with emphasis on the biodegradation behavior, microstructure and mechanical properties in view of potential application of these materials in bone implants.

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Zhu, Xiang Rong, Zhong Ping Xu, Nai Ci Bing, and Qiu Rong Chen. "Corrosion Behaviors in Simulated Body Fluid for TiO₂ Films Deposited on AZ31 Magnesium Alloys by Magnetron Sputtering." Applied Mechanics and Materials 217-219 (November 2012): 1053–56. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1053.

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TiO2 films were deposited on AZ31 magnesium alloy substrates by r.f. magnetron sputtering. The corrosion behaviors in simulated body fluid (SBF) of the film samples were investigated and compared to the bare AZ31 magnesium alloy. After 3 days’ corrosion in SBF, only part of the TiO2 layer suffered from corrosion and the substrate was prevented from corrosion. In contrast, the bare magnesium alloy suffered from severe corrosion. After 10 days’ corrosion, the TiO2 layer was penetrated and the substrates still did not suffer from corrosion. After 15 days’ corrosion, besides TiO2 layer, the substrate suffered from corrosion to some degree. The depth of the corrosion layer is about 6 m, which is far lower than that of bare magnesium alloy, 40 m. The results show that TiO2 films effectively improve the corrosion properties of magnesium alloys.

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Drábiková, J., S. Fintová, P. Doležal, J. Wasserbauer, and Z. Florková. "Corrosion resistance of the biodegradable ZE41 magnesium alloy treated by unconventional fluoride conversion coating." Koroze a ochrana materialu 63, no. 4 (December 1, 2019): 138–47. http://dx.doi.org/10.2478/kom-2019-0018.

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Abstract Magnesium based alloys are very promising material to be used mainly for biodegradable implants in medical applications. However, due to their very low corrosion resistance in the environment of in vivo is their use limited. Increase of the corrosion resistance of magnesium alloys in vivo can be achieved, for example, by a suitable choice of surface treatment while the biocompatibility must be ensured. Fluoride conversion coatings meet these requirements. Unconventional fluoride conversion coating was prepared on ZE41 magnesium alloy by dipping the magnesium alloy into the Na[BF4] salt melt at 450 °C for 0.5; 2 and 8 h. The morphology and thickness of the prepared fluoride conversion coatings were investigated as well as the corrosion resistance of the treated and untreated ZE41 magnesium alloy specimens. The corrosion resistance of the untreated and treated ZE41 magnesium alloy was investigated using electrochemical impedance spectroscopy in the environment of the simulated body fluids at 37 ± 2 °C. The obtained results showed a positive influence of the fluoride conversion coating on the corrosion resistance of the ZE41 magnesium alloy.

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SATO, Fumihiro, Yoshihiko ASAKAWA, Takenori NAKAYAMA, and Hiroshi SATOH. "Special issue "Magnesium and magnesium alloys". Corrosion behavior of magnesium alloys with different surface treatments." Journal of Japan Institute of Light Metals 42, no. 12 (1992): 752–58. http://dx.doi.org/10.2464/jilm.42.752.

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Bender, S., J. Goellner, A. Heyn, and E. Boese. "Corrosion and corrosion testing of magnesium alloys." Materials and Corrosion 58, no. 12 (December 2007): 977–82. http://dx.doi.org/10.1002/maco.200704091.

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Skar, J. I. "Corrosion and corrosion prevention of magnesium alloys." Materials and Corrosion 50, no. 1 (January 1999): 2–6. http://dx.doi.org/10.1002/(sici)1521-4176(199901)50:1<2::aid-maco2>3.0.co;2-n.

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Liu, Cheng Long, Jiang Jiang, Meng Wang, Yue Ji Wang, Paul K. Chu, and Wei Jiu Huang. "In Vitro Degradation and Biocompatibility of WE43, ZK60, and AZ91 Biodegradable Magnesium Alloys." Advanced Materials Research 287-290 (July 2011): 2008–14. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.2008.

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Successful application of magnesium alloys as degradable load-bearing implants is determined by their biological performance especially degradation and corrosion behavior in the human body. Three magnesium alloys, namely WE43, ZK60, and AZ91 are investigated in this work. The invitrodegradation behavior, cytotoxicity, and genotoxicity are evaluated by corrosion tests, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and micronuclei tests, respectively. Immersion tests indicate that the ZK60 alloy has the best corrosion resistance and lowest corrosion rate in Hank’s solution, followed by AZ91 alloy and WE43 alloy in that order. The MTT results obtained from the three magnesium alloys after 7 days of immersion indicate good cellular viability. However, excessively high aluminum and magnesium concentrations have a negative influence on the genetic stability.

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Wu, Zhi Lin, Duo Xiang Wu, Ren Shu Yuan, Lei Zhao, and Yan Bao Zhao. "Electrochemical Corrosion Behavior of AZ80 Magnesium Alloy Tube Fabricated by Hydrostatic Extrusion." Applied Mechanics and Materials 624 (August 2014): 77–81. http://dx.doi.org/10.4028/www.scientific.net/amm.624.77.

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The corrosion behavior of hydrostatic extruded tube AZ80 magnesium alloy was investigated by polarization curves and electrochemical impedance spectroscopy (EIS) in simulated atmosphere. The results indicated that, the corrosion resistance of the hydrostatic extruded AZ80 magnesium alloy with uneven deformed grains and increased sub-grains were obviously weakened, with larger corrosion current density in the polarization curves and lower corrosion resistances in the electrochemical impedance spectroscopy plots. This was mainly because of the hydrostatic extrusion which made AZ80 magnesium alloy within large numbers of dislocation tangles. So the residual stress increased the electrochemical activity of magnesium alloy which reduced the corrosion resistance of magnesium alloys.

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Eliezer, Amir. "Corrosion Behavior of Surfaced AM50 Magnesium Alloys under Stress Conditions." Advanced Materials Research 95 (January 2010): 79–83. http://dx.doi.org/10.4028/www.scientific.net/amr.95.79.

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Micro-arc oxidization of AM50 magnesium alloys was studied. The influence of micro-arc oxidization process was investigated; phase structure were analyzed using X-ray diffraction (XRD). Open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion resistance of ceramic coatings formed on magnesium alloys under stress conditions. XRD analyses indicate that the ceramic coatings fabricated on the surface of magnesium alloys by micro-arc oxidization are composed of spinel phase MgAl2O4 The corrosion resistance of ceramic coatings is improved compared with magnesium alloy substrate.

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Xu, Bin, Ke Zai Miao, Jing Yang, and Bai Yang Lou. "The Research on Anti-Corrosion Property of Epoxy/Polyurethane Coating of Magnesium Alloys." Advanced Materials Research 152-153 (October 2010): 1262–66. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.1262.

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The epoxy/polyurethane coating has high electrical isolation, anti-corrosion and high adhesive bond strength with magnesium alloy substrate. The coating can effectively block or reduce the substrate erosion induced by water, oxygen as well as the corrosive ions such as , and . The mechanism and efficiency of corrosion protection of the polyurethane coating and epoxy/polyurethane coating on magnesium alloys were studied experimentally. The results indicate that both kinds of coatings improved the anti-corrosion property of magnesium alloy evidently. The anti-corrosion property of the epoxy/polyurethane coating is better than that of the polyurethane coating. The experimental results, which were obtained by the immersion tests in 3.5wt% NaCl solution, loss weight tests, salt spray tests, adhesive force tests, hardness tests, electrochemical tests and stereo microscope photos, definitely support the previous conclusions.

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Drábiková, J., F. Pastorek, S. Fintová, P. Doležal, and J. Wasserbauer. "Improvement of bio-compatible AZ61 magnesium alloy corrosion resistance by fluoride conversion coating." Koroze a ochrana materialu 60, no. 5 (December 1, 2016): 132–38. http://dx.doi.org/10.1515/kom-2016-0021.

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Abstract Magnesium and its alloys are perspective bio-degradable materials used mainly due to their mechanical properties similar to those of mammal bones. Potential problems in utilization of magnesium alloys as bio-materials may relate to their rapid degradation which is associated with resorption problems and intensive hydrogen evolution. These problems can be eliminated by magnesium alloys surface treatment. Therefore, this work aims with analysis of the influence of fluoride conversion coating on corrosion characteristics of magnesium alloy. Unconventional technique by insertion of wrought magnesium alloy AZ61 into molten Na[BF4] salt at temperature of 450 °C at different treatment times was used for fluoride conversion coating preparation. The consequent effect of the coating on magnesium alloy corrosion was analyzed by means of linear polarization in simulated body fluid solution at 37 ± 2 °C. The obtained results prove that this method radically improve corrosion resistance of wrought AZ61magnesium alloy even in the case of short time of coating preparation.

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Yang, Yanxia, Yuanzhi Wu, Yu Wei, Tian Zeng, Baocheng Cao, and Jun Liang. "Preparation and Characterization of Hydroxyapatite Coating on AZ31 Magnesium Alloy Induced by Carboxymethyl Cellulose-Dopamine." Materials 14, no. 8 (April 8, 2021): 1849. http://dx.doi.org/10.3390/ma14081849.

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Magnesium and its alloys have become potential implant materials in the future because of light weight, mechanical properties similar to natural bone, good biocompatibility, and degradability in physiological environment. However, due to the rapid corrosion and degradation of magnesium alloys in vivo, especially in the environment containing chloride ions, the application of magnesium alloys as implant materials has been limited. Therefore, improving the corrosion resistance of magnesium alloy and ensuring good biocompatibility is the main focus of the current research. In this study, hydroxyapatite coating was prepared on magnesium alloy surface using carboxymethyl cellulose-dopamine hydrogel as inducer to improve corrosion resistance and biocompatibility. Surface characterization techniques (scanning electron microscopy, Fourier-transformed infrared spectroscopy, energy dispersive X-ray spectroscopy- and X-ray diffraction) confirmed the formation of hydroxyapatite on the surface of AZ31 alloy. Corrosion resistance tests have proved the protective effect of Carboxymethyl cellulose-Dopamine/hydroxyapatite (CMC-DA/HA) coating on the surface of AZ31 alloy. According to MC3T3-E1 cell viability and Live/Dead staining, the coating also showed good biocompatibility. The results will provide new ideas for the biological application of magnesium alloys.

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Ferguson, W. G., Wu Liu, and John MacCulloch. "Corrosion - Fatigue Performance of Magnesium Alloys." International Journal of Modern Physics B 17, no. 08n09 (April 10, 2003): 1601–7. http://dx.doi.org/10.1142/s0217979203019381.

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To determine the effect of a coating on fatigue strength, three point bend fatigue tests of coated and un-coated AM50 and AZ91D magnesium high pressure die cast specimens were made and S-N curves determined. Environments used were air, tap water and natural seawater. A difference in corrosion fatigue performance has been found, between AZ91D and AM50 and for both alloys performance in air was superior to both water environments. AZ91D has better corrosion fatigue resistance in tap water than in seawater; conversely, AM50 has better corrosion fatigue resistance in seawater than tap water. The results showed that the fatigue life was not reduced in these water environments for coated specimens, as the coating usually provided protection from corrosion.

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Na, Young Gee, Dan Eliezer, and Kwang Seon Shin. "Corrosion of New Wrought Magnesium Alloys." Materials Science Forum 488-489 (July 2005): 839–44. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.839.

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The development of new components with magnesium alloys for the automotive industry has increased in recent years due to their high potential as structural materials for low density and high strength/weight ratio demands. However, the limited mechanical properties of the magnesium alloys have led to search new kind of magnesium alloys for better strength and ductility. The main objective of this research is to investigate the mechanical properties and the corrosion behavior of new wrought magnesium alloys; Mg-Zn-Ag (ZQ) and Mg-Zn-Si (ZS) alloys. The ZQ6X and ZS6X samples were fabricated using hot extrusion method. Tensile tests and immersion tests were carried out on the specimens from the extruded rods, which contained different amounts of silver or silicon, in order to evaluate the mechanical properties and corrosion behavior. The microstructure was examined using optical and electron microscopy (TEM and SEM) and EDS. The results showed that the addition of silver improved the mechanical properties but decreased the corrosion resistance. The addition of silicon improved both mechanical properties and corrosion resistance. These results can be explained by the effects of alloying elements on the microstructures of the Mg-Zn alloys such as grain size and precipitates caused by the change in precipitation and recrystallization behavior.

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Doležal, Pavel, Lukáš Fojt, and Jozef Minda. "Methodology for In Situ Microstructural Characterisation of AZ31 Magnesium Alloy Corrosion Degradation in Hanks' Solution." Materials Science Forum 891 (March 2017): 298–302. http://dx.doi.org/10.4028/www.scientific.net/msf.891.298.

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Due to their specific properties magnesium and magnesium alloys find huge application possibilities mainly in automotive, engineering, transport and space industry. Important properties of magnesium alloys for engineering applications are high specific strength and high internal dumping values, while biocompatibility, biotoxicity and biodegradability open them the possibility to be used for biomedical applications. Development of new biodegradable magnesium alloys, investigation of new production and processing technologies on their properties and evaluation of corrosion degradation in simulated body fluids solutions are the main topics of the last decades.The paper offers a method simulating in-vivo tests for description of the corrosion process of potential biomedical materials in time using atomic force microscopy (AFM). To prove the proposed methodology detailed analysis of the corrosion degradation of AZ31 cast magnesium alloy in flowing Hanks’ balanced salt solution (HBSS) was performed. Corrosion degradation process of the examined alloy was influenced by different microstructural features and their interfaces. Results of the created corrosion galvanic cells and the corrosion attack evolution on the interface of the present intermetallic phases and the matrix led to profile changes detected by AFM.

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Zhu, Li Ping, Yu Jin Zhu, Chao Lun Wang, Chuang Lu, Xiao Zu Fang, and Xue Jun Cao. "Atmospheric Corrosion of AZ80 Magnesium Alloy." Applied Mechanics and Materials 496-500 (January 2014): 331–35. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.331.

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The atmospheric corrosion behaviors of AZ80 magnesium alloy are investigated by exposure test in different testing sites. After four months exposure test, the corrosion morphologies and the component of the corrosion products were observed by the scanning electron microscopy (SEM) equipped with energy-dispersive analysis of X-ray (EDAX). The corrosion rates of AZ80 magnesium alloys were calculated by mass-loss. The results indicated that the corrosion resistance of AZ80 magnesium alloy in the sea environment is the worst. The corrosion degree of the back surface is worse than the front side. The corrosion products are mainly formed by carbonate, and contain small amount of chloride in most environments, while in Xishuangbanna and Jiangjin area contain a little sulfate.

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Dvorský, Drahomír, Jiří Kubásek, and Dalibor Vojtěch. "AZ31 and WE43 Alloys for Biomedical Applications." Solid State Phenomena 270 (November 2017): 205–11. http://dx.doi.org/10.4028/www.scientific.net/ssp.270.205.

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Magnesium and its alloys are considered for application as materials for biodegradable implants as they have mechanical properties similar to bone tissue. High demands on corrosion and mechanical properties are made on these alloys. While mechanical properties of magnesium are usually enhanced by alloying, corrosion properties may deteriorate. This paper is focused on the comparison of magnesium alloys AZ31 (3 wt. % Al, 1 wt. % Zn) and WE43 (4 wt. % Y, 3 wt. % Nd) which are considered for biomedical applications. Besides the type of alloying elements, the preparation process has also great impact on final mechanical and corrosion properties. Alloying elements may be dissolved in magnesium matrix or they can form intermetallic phases, which alter final properties. Microstructure, mechanical and corrosion properties of AZ31 and WE43 were studied and compared with pure magnesium.

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Dobkowska, Anna, Boguslawa Adamczyk-Cieslak, Jaroslaw Mizera, Jiří Kubásek, and Dalibor Vojtěch. "Corrosion Behaviour of Magnesium Lithium Alloys in NaCl Solution." Solid State Phenomena 227 (January 2015): 87–90. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.87.

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This work includes the comparison between corrosion resistance of MagLi4, MgLi7.5 and MgLi15 alloys in sodium chloride (0.15M NaCl) solution at 37°C. Results showed that the corrosion resistance is strongly determined by lithium content in the alloy. The worst corrosion resistance is typical for MgLi7.5 where the dual phase structure is observed. The magnesium - lithium alloys which contain less than 5% of Li and more than 11% (one phase structures) has got better corrosion resistance than dual phase structure magnesium – lithium alloys

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Blawert, Carsten, V. Heitmann, Wolfgang Dietzel, M. Störmer, Y. Bohne, Stephan Mändl, and B. Rauschenbach. "Corrosion Properties of Supersaturated Magnesium Alloy Systems." Materials Science Forum 539-543 (March 2007): 1679–84. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1679.

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The range of applications for magnesium alloys is still limited due to their relatively poor corrosion behavior. In recent years, various new magnesium alloys were developed, some of them with improved corrosion properties, thus opening new fields of application. However, the number of alloying elements for the use in conventional cast processes is limited due to their interaction with liquid magnesium, other alloying elements or large differences in the melting temperatures. The possibilities for grain refinement by post-processing are also restricted. PVD techniques can help to produce supersaturated precipitation free and microcrystalline magnesium layers. Using ion beam and magnetron sputtering, binary or ternary Mg-Al, Mg-Ti and Mg-Sn alloy systems as well as standard alloys (AM50, AZ91 and AE42) were deposited on silicon and on magnesium substrates. The effect of the microstructure on the corrosion properties was studied by comparing as cast material and PVD coatings using potentiodynamic polarization, linear polarization resistance, and electrochemical impedance techniques.

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Liu, Lumei, Kassu Gebresellasie, Boyce Collins, Honglin Zhang, Zhigang Xu, Jagannathan Sankar, Young-Choon Lee, and Yeoheung Yun. "Degradation Rates of Pure Zinc, Magnesium, and Magnesium Alloys Measured by Volume Loss, Mass Loss, and Hydrogen Evolution." Applied Sciences 8, no. 9 (August 25, 2018): 1459. http://dx.doi.org/10.3390/app8091459.

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Degradation rate is an important property to evaluate bioabsorbable metallic material; however, values vary depending on the method of measurement. In this study, three different methods of measuring corrosion rate are compared. The degradable samples to analyze corrosion rates include pure magnesium (Mg), lab produced Mg–Zn–Ca alloy (47-7-2), Mg–Zn–Zr–RE (rare earth) alloys (60-13, 60-14), Mg–Zn–Ca–RE alloy (59B), and pure zinc (Zn). A eudiometer was used to measure hydrogen evolution from the reaction of degradable alloys in Hank’s Balanced Salt Solution (HBSS). Corrosion rates based on volume loss of tested alloys in 30 days were calculated using Micro-computed tomography (micro-CT). Final mass change due to corrosion and corrosion removal was measured with a scale. We observed that the corrosion rates indicated by hydrogen evolution were high initially, and slowed down sharply in the following measurements. The corrosion rates of tested alloys calculated by volume loss and mass loss from high to low are: 60–13 ≈ 60–14 ≈ 47–7–2 > 59B > Mg > Zn (p < 0.05). The results provide instruction to experimental methodology to measure corrosion rates of degradable alloys.

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Xin, Yunchang, Kaifu Huo, Tao Hu, Guoyi Tang, and Paul K. Chu. "Corrosion products on biomedical magnesium alloy soaked in simulated body fluids." Journal of Materials Research 24, no. 8 (August 2009): 2711–19. http://dx.doi.org/10.1557/jmr.2009.0323.

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Magnesium alloys are potential materials in biodegradable hard tissue implants. Their degradation products in the physiological environment not only affect the degradation process but also influence the biological response of bone tissues. In the work reported here, the composition and structure of the corrosion product layer on AZ91 magnesium alloy soaked in a simulated physiological environment, namely simulated body fluids (SBFs), are systematically investigated using secondary electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), and in situ monitoring of the corrosion morphology. Our results show that the corrosion product layer comprises mainly amorphous magnesium (calcium) phosphates, magnesium (calcium) carbonates, magnesium oxide/hydroxide, and aluminum oxide/hydroxide. The magnesium phosphates preferentially precipitate at obvious corrosion sites and are present uniformly in the corrosion product layer, whereas calcium phosphates nucleate at passive sites first and tend to accumulate at isolated and localized sites. According to the cross sectional views, the corrosion product layer possesses a uniform structure with thick regions several tens of micrometers as well as thin areas of several micrometers in some areas. Localized corrosion is the main reason for the nonuniform structure as indicated by the pan and cross-sectional views. The results provide valuable information on the cytotoxicity of magnesium alloys and a better understanding on the degradation mechanism of magnesium alloys in a physiological environment.

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BAI, LIQUN, MIN GUO, DI LI, JIANGANG QIAN, and BAOLAN GUO. "THE INFLUENCE OF ANODIZED FILM ON CORROSION BEHAVIOR OF MAGNESIUM ALLOYS." International Journal of Modern Physics B 20, no. 25n27 (October 30, 2006): 3674–79. http://dx.doi.org/10.1142/s0217979206040180.

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The influence of anodized film on corrosion and electrochemical behavior of extruded magnesium alloy AZ63, cast and die-cast magnesium alloys AZ91D were investigated by using immersion technique, electrochemical methods, SEM, EDAX, IR and XRD. The results showed anodized film could improve remarkably corrosion resistance. Protection effect was different with the same anodizing process because formation status of anodized film of different materials was different. The formation status of anodized film was related to alloy microstructure as revealed by optical and scanning electron microscopy. The formatting process and casting method strongly influences the corrosion performance by affecting on the alloy microstructure. A tentative corrosion mechanism is presented explaining the corrosion behavior of anodized magnesium alloy.

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Unigovski, Ya, A. Eliezer, E. Abramov, Y. Snir, and E. M. Gutman. "Corrosion fatigue of extruded magnesium alloys." Materials Science and Engineering: A 360, no. 1-2 (November 2003): 132–39. http://dx.doi.org/10.1016/s0921-5093(03)00409-x.

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Journal articles on the topic 'Corrosion ; Magnesium ; Magnesium alloys'

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