Journal articles: 'Mild steel – Corrosion'

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Morcillo, M., D. De la Fuente, I. Díaz, and H. Cano. "Atmospheric corrosion of mild steel." Revista de Metalurgia 47, no. 5 (October 30, 2011): 426–44. http://dx.doi.org/10.3989/revmetalm.1125.

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Agboola, Oluranti, Toluwani Adedoyin, Ojo Sunday Isaac Fayomi, Ayoola Ayodeji, Samuel E. Sanni, Augustine Omoniyin Ayeni, Patricia Popoola, et al. "DNA Inhibition of Hydrogen Ion-Induced Corrosion of Mild Steel Used for Pipelines in Oil and Gas Industries." Asian Journal of Chemistry 33, no. 4 (March 20, 2021): 767–74. http://dx.doi.org/10.14233/ajchem.2021.22686.

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Corrosion of mild steel via chemical reaction in a corrosive environment is a problematic occurrence that is very common in oil and gas industries. Corrosion constitutes a huge part of the total costs in the production of oil and gas. Corrosion inhibitors have found interest in the scientific domain because they are mainly understood by their chemical complexes and formulations. Their utilization in small amount on metal surface used in oil and gas industries can help shield the metal from corrosion devoid of any significant alteration in the concentration of the corrosive media in the environment. An effort was made to study the possibility of using calf thymus gland DNA (CTGDNA) inhibitor in chlorine induced mild steel for possible usage in piping in oil and gas industry. The SEM micrograph shows that the adsorption of the CTGDNA biomacromolecules coat on the mild steel surfaces functions as a protection against HCl corrosive solution. Electrochemical study and weight loss analysis showed that the inhibitor efficiency (70.48 and 72%, respectively) of the tested DNA (CTGDNA) in HCl acidic corrosion environment for the mild steel was high at 1.5 M of HCl. The inhibitor efficiency decreased with increasing HCl concentrations. The open circuit potential (OPC) revealed that the mild steels got corroded until the end of the immersion. The intensities of XRD peak substantiate the existence of corrosion products of FeCl2.

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Bondar, Olena, Viktoria Vorobyova, Iryna Kurmakova, and Olena Chygyrynets. "Aminooxoethylpyridinium Chlorides as Inhibitors of Mild Steel Acid Corrosion." Chemistry & Chemical Technology 12, no. 1 (March 21, 2018): 127–33. http://dx.doi.org/10.23939/chcht12.01.127.

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Ram, Chhotu, Chaya Sharma, and Ajay Kumar Singh. "Corrosion Performance of Mild Steel in Paper Mill Effluent." Advanced Materials Research 585 (November 2012): 522–27. http://dx.doi.org/10.4028/www.scientific.net/amr.585.522.

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Present paper reports investigations carried on corrosion behaviour of mild steel in effluents collected from paper mill treatment plant. For this purpose, effluent was collected from after primary and secondary treatment stages. Mild steel samples were exposed to these effluents for duration of six months. The corroded samples were analysed for weight loss and extent of localised corrosion. Electrochemical polarization tests like open circuit potential (OCP), tafel plot and anodic polarization were also performed to estimate corrosion rate, polarization resistance and localized corrosion parameters in the studied system. The extent of corrosion attack has been correlated with effluent parameters namely pH, electrical conductivity (Ec), total suspended solids, total dissolved solids, chemical oxygen demand, biochemical oxygen demand, chloride content, colour and sulphate.

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Garg, Urvija, and R. K. Tak. "Inhibition of the Corrosion of Mild Steel in Acid Media by Naturally Occurring Acacia Senegal." E-Journal of Chemistry 7, no. 4 (2010): 1220–29. http://dx.doi.org/10.1155/2010/715047.

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The inhibition of corrosion of mild steel in HCl solution by naturally occurringAcacia Senegalhas been studied in relation to the concentration of inhibitor and concentration of corrosive medium. It has been observed that theAcacia Senegalalcoholic extract acts as a good corrosion inhibitor in hydrochloric acid solution and the adsorption of the extract provides a good protection against mild steel corrosion.

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Garcia, Roger, Fang Li, and Lester Hendrickson. "Microbiologically induced corrosion of stainless steel by Desulfovibrio vulgaris: An scanning electron microscope study." Proceedings, annual meeting, Electron Microscopy Society of America 49 (August 1991): 28–29. http://dx.doi.org/10.1017/s0424820100084442.

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The corrosion of mild steel by sulfate reducing bacteria has been studied quite extensively. However, with the replacement of mild steels with stainless steel in many of these applications numerous sightings of corroding stainless steel have been made as well. Initially, the cathodic depolarization theory was widely accepted as the mechanism for both. The essential part of this theory involves the removal of hydrogen from the metal surface. Hydrogenase in Desulfovibrio allows utilization of elemental hydrogen from the cathode of the corrosion cell. This causes the reduction of sulfate whereby the biological cell gets its energy via a respiration process. Finally, the oxygen from the sulfate becomes available to the cathode and hence corrosion is enhanced. Without this reducing action the cathode would become polarized thereby decreasing the EMF and lowering the corrosion rate. Among other proposed mechanisms are differential aeration cells and corrosive products produced by the bacteria.

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AL-Amouri, Arwa, and Priy Brat Dwivedi. "EXPERIMENTAL STUDY ON ASCORBIC ACID ADDITIVE AS GREEN INHIBITOR AGAINST CORROSION OF MILD STEEL." Green Chemistry & Technology Letters 5, no. 1 (March 2, 2019): 01–09. http://dx.doi.org/10.18510/gctl.2019.511.

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Purpose of study: The corrosion behavior of mild steel and the inhibition effect of ascorbic acid (an anti-oxidant additive) on aluminum coatings on the mild steel have been studied by weight loss technique under different corrosive medium. Methodology: Tap water, 3% Na2CO3 solution, seawater and open-air were chosen as different corrosive medium at ambient temperature range of 35- 400C. Corrosion was recorded using the weight-loss method and the rate was calculated. Later similar mid steel samples were coated with Sodium Bicarbonate paste, aluminum paint with ascorbic acid additive, and aluminum paint without ascorbic acid additive, in similar corroding medium, and the corrosion rate was calculated using the weight-loss method. Main Findings: Results show that the percentage of mild steel corrosion was found to be highest in the seawater and lowest in 3% Na2CO3 solution. Sodium Bicarbonate paste reduces the corrosion rate more studies on the corrosion protection was performed by coating the mild steel surface with aluminum paint along with ascorbic acid inhibitor i.e., a green corrosion inhibitor and it was found that the weight loss data is: 85.03 g from 85.05 g, 82.39 g from 82.43 g, no weight loss and 85.73 g from 85.74 g in tap water, seawater, 3% Na2CO3 solution and air medium respectively. Thus, the addition of ascorbic acid inhibitor gave the highest inhibition efficiency for aluminum paint.

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Volkland, H. P., H. Harms, O. Wanner, and A. J. B. Zehnder. "Corrosion protection by anaerobiosis." Water Science and Technology 44, no. 8 (October 1, 2001): 103–6. http://dx.doi.org/10.2166/wst.2001.0475.

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Biofilm-forming bacteria can protect mild (unalloyed) steel from corrosion. Mild steel coupons incubated with Rhodoccocus sp. strain C125 and Pseudomonas putida mt2 in an aerobic phosphate-buffered medium containing benzoate as carbon and energy source, underwent a surface reaction leading to the formation of a corrosion-inhibiting vivianite layer [Fe3(PO4)2]. Electrochemical potential (E) measurements allowed us to follow the buildup of the vivianite cover. The presence of sufficient metabolically active bacteria at the steel surface resulted in an E decrease to -510 mV, the potential of free iron, and a continuous release of ferrous iron. Part of the dissolved iron precipitated as vivianite in a compact layer of two to three microns in thickness. This layer prevented corrosion of mild steel for over two weeks, even in a highly corrosive medium. A concentration of 20 mM phosphate in the medium was found to be a prerequisite for the formation of the vivianite layer.

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Kumar, Harish, and Tilak Dhanda. "Cetyl Trimethyl Ammonium Bromide as Anti-Pit Agent for Mild Steel in Sulfuric Acid Medium." Current Physical Chemistry 10, no. 3 (November 4, 2020): 164–77. http://dx.doi.org/10.2174/1877946809666191011162351.

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Aim: Pitting corrosion is a very serious problem for mild steel when it comes in contact with the dilute sulfuric acid medium. Specialized corrosion inhibitors are essentially required to minimize pitting and uniform types of corrosion in mild steel. Background: Most of the corrosion inhibitors discovered so far protects the mild steel from uniform type of corrosion. But pitting corrosion is more fatal than a uniform type of corrosion because it immediately makes mild steel unfit for use as leakage starts from the pit. Objective: The objective was to protect the mild steel alloys from pitting corrosion when comes in contact with dilute sulfuric acid by the use of organic corrosion inhibitor. Methods: Cetyl Trimethyl Ammonium Bromide (CTAB) is tested as a corrosion inhibitor for mild steel in 0.1 N H2SO4 as corroding medium at 25.0, 30.0 and 35.0°C by weight loss, electrochemical polarization, and Impedance spectroscopy methods. Surface study of corroded and un-corroded specimens of mild steel was carried out by Metallurgical Research Microscopy (MRM) and Scanning Electron Microscopy (SEM) techniques. Results: Surface study confirms that the adsorption of CTAB takes place through nitrogen atom resulting in the formation of uniform, nonporous, passive film confirmed by decrease in Warburg Impedance (Zw), decrease in Faradaic current, increase in Capacitive current, an increase in charge transfer resistance, Rct (41 to 401 Ω cm2) and significant increase in capacitive loop in Nyquist plot with increase in concentration of CTAB which results in significant decrease in corrosion rate of mild steel in 0.1N H2SO4 medium (percentage corrosion inhibition efficiency: 95.0%) especially eradicating pitting type of corrosion. Conclusion: CTAB was proved to be a very good anti-pit agent for mild steel in 0.1N sulfuric acid medium. Pitting and uniform type of corrosion was significantly reduced by the use of CTAB as corrosion inhibitor for mild steel in the dilute sulfuric acid medium at 25.0, 30.0 and 35.0°C.

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Subhasree, S., P. Anitha, K. Kannan, A. Ramachandran, J. J. Sheri, and R. Jayavel. "Anticorrosion Behavior of ZnO Nanoparticles Coated on Mild Steel in NaCl Solution." Journal of Nanoscience and Nanotechnology 20, no. 7 (July 1, 2020): 4061–68. http://dx.doi.org/10.1166/jnn.2020.17526.

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This work focuses on the environment protected, ecological procedure by the combination of ZnO nanoparticles utilizing the extraction of Ocimum sanctum. The prepared nanoparticles are examined by different methods like Fourier-transform infrared spectroscopy (FTIR), X-ray Diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Energy Dispersive X-ray Analysis (EDAX). A systematic study has been made on the result of ZnO nano-coating for the corrosion behavior of mild steel. The ZnO nanoparticles of average diameter in the range 18–22 nm were coated on mild steel in nickel bath solution. The anticorrosion properties on the coated mild steel was carefully tested in 3.5% NaCl solution by performing potentio-dynamic polarization measurement and electrochemical impedance spectroscopy. Surface morphology of the coated mild steel immersed in corrosive solution was judged by using SEM with EDAX. The ZnO nano coating has shown a perfect protection against corrosion and the shielding capability is in the range between 86–95%. The incorporation of ZnO nanoparticles has upgraded the process of mild steel in all corrosion media are subjected to investigation.

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Beeharry, P., and B. Y. R. Surnam. "Atmospheric Corrosion of Welded Mild Steel." Materials Today: Proceedings 5, no. 2 (2018): 7476–85. http://dx.doi.org/10.1016/j.matpr.2017.11.419.

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Chaturvedi, R. K., and R. S. Chaudhary. "Inhibition of Corrosion of Mild Steel." Anti-Corrosion Methods and Materials 41, no. 5 (May 1994): 3–6. http://dx.doi.org/10.1108/eb007346.

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MERCER, A. D., and E. A. LUMBARD. "Corrosion of mild steel in water." British Corrosion Journal 30, no. 1 (January 1995): 43–55. http://dx.doi.org/10.1179/bcj.1995.30.1.43.

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Popova, Angelina, Stefka Veleva, and Svetla Raicheva. "Kinetic approach to mild steel corrosion." Reaction Kinetics and Catalysis Letters 85, no. 1 (May 2005): 99–105. http://dx.doi.org/10.1007/s11144-005-0248-8.

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Kamble, P. P., and R. S. Dubey. "Effect of 1-Acetyl-1H-Benzotriazole on Corrosion of Mild Steel in 1M HCl." Journal of Scientific Research 13, no. 3 (September 1, 2021): 979–88. http://dx.doi.org/10.3329/jsr.v13i3.52725.

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The corrosion inhibition study of 1-acetyl-1H-benzotriazole (ABTZ) on mild steel in 1M HCl solution has been investigated using different techniques like weight loss, open circuit potential (OCP), and potentiodynamic polarization. Results showed that ABTZ inhibited mild steel corrosion in acid solution and indicated that the inhibition efficiencies increased with the increase in inhibitor concentration. The polarization curves revealed that the studied compound behaved as a mixed-type of inhibitor. The adsorption of the inhibitor on the surface of mild steel in the corrosive environment followed the Langmuir isotherm. The presence of thin film formed due to adsorption of ABTZ on mild steel surface is further confirmed by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX).

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Ali, M. R., C. M. Mustafa, and M. Habib. "Effect of Molybdate, Nitrite and Zinc Ions on the Corrosion Inhibition of Mild Steel in Aqueous Chloride Media Containing Cupric Ions." Journal of Scientific Research 1, no. 1 (December 24, 2008): 82–91. http://dx.doi.org/10.3329/jsr.v1i1.1053.

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An investigation has been conducted on the corrosion inhibition of mild steel by molybdate, nitrite and zinc ions in aqueous chloride media containing cupric ions. Molybdate inhibits mild steel corrosion in near neutral and alkaline (pH 6 and above) chloride media and accelerates corrosion in acidic media (below pH 6) both in the presence and absence of cupric ions. Nitrite inhibits mild steel corrosion in chloride media at pH 4.5 and above, but accelerates corrosion below pH 4.5 both in the presence and absence of cupric ions. Molybdate and nitrite act as a synergistic corrosion inhibitor in chloride media with or without cupric ions at pH 4.5 and above. In the acidic region between pH 3 and 4.5, the combination can decrease corrosion with a low concentration of molybdate and high concentration of nitrite. These concentrations depend on the relative amounts of molybdate and nitrite present in the system. Zinc ions inhibit mild steel corrosion only in acidic chloride media. Based on the experimental results, mechanisms of action of molybdate, nitrite and zinc ions on mild steel corrosion in aqueous chloride media with or without cupric ions have been proposed.Keywords: Molybdate; Nitrite; Mild steel; Corrosion rate; Synergistic corrosion inhibitor.© 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.DOI: 10.3329/jsr.v1i1.1053

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Magrati, Prakash, Dhruba Babu Subedi, Durga Bhakta Pokharel, and Jagadeesh Bhattarai. "Appraisal of Different Inorganic Inhibitors Action on the Corrosion Control Mechanism of Mild Steel in HNO3 Solution." Journal of Nepal Chemical Society 41, no. 1 (August 5, 2020): 64–73. http://dx.doi.org/10.3126/jncs.v41i1.30489.

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Effects of eco-friendly inorganic inhibitors (i.e., calcium nitrate, zinc sulfate, sodium hexametaphosphate and sodium tetra-borate or borax) for the mild steel corrosion control in 1 M HNO3 solution open to air at 28±1 °C were studied using corrosion, inhibition efficiency, and corrosion potential tests. The corrosion rate of the mild steel is increased with increasing the concentrations of HNO3 solution from 0.01 M to 1 M. The uses of 200-2400 ppm of these inhibitors enhanced the corrosion resistance properties of the mild steel in 1 M HNO3 solution. The corrosion resistance property of the mild steel is generally decreased with increasing the concentration of all corrosion inhibitors used here. The most efficient corrosion inhibitor is found to be calcium nitrate and it is followed by zinc sulfate, sodium hexametaphosphate, and borax subsequently. Adsorption of these inorganic salts inhibitors on the mild steel surface obeyed Langmuir adsorption isotherm. Consequently, the corrosion inhibition mechanism of the four inorganic salts for the mild steel corrosion control can be explained based on the formation of the passive film. It is found from the corrosion potential measurement that the cathodic type of corrosion inhibition action was by calcium nitrate, whereas zinc sulfate, sodium hexametaphosphate, and borax are acted as a mixed type of the inhibitors in 1 M HNO3 solution. In summary, all four inorganic inhibitors utilized in the present study can be applied as an environmentally friendly inhibitor to control the corrosion of the mild steel in aggressive HNO3 solutions.

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Avchukir, K., and B. D. Burkitbayeva. "Conductive Polymer/SiO2 Composite as an Anticorrosive Coating Against Carbon Dioxide Corrosion of Mild Steel. A Simulation Study." Eurasian Chemico-Technological Journal 22, no. 4 (December 30, 2020): 295. http://dx.doi.org/10.18321/ectj991.

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In this work corrosion of mild steel affected by carbon dioxide was studied using a simulation model developed by Nordsveen M. and Nesic S. Using this comprehensive model of the uniform corrosion made possible to predict of corrosion rate of steel in the carbonic acid medium and the influence of different conditions on the anticorrosive property of coated electrode has been investigated. 1D model of corrosion process includes Butler-Volmer and Tafel equations and takes into account both the kinetics of anodic dissolution of an iron and electrochemical discharge of carbonic acid, water and hydrogen ions. The model has been created in COMSOL Multiphysics software and further improvement of this model allowed studying the influence of parameters such as solution composition, the partial pressure of CO2, temperature and flow velocity of the solution on the corrosion rate of the steel. The results of numerical simulation demonstrate that the use of conductive polymerpolypyrrole/ SiO2 composite as an anti-corrosive resin coating reduces the corrosion rate of mild steel by 7 times or more, depending on pH, temperature and flow rate. Furthermore, increasing of flow velocity from 0.1 to 10 m/s affects to the removal of corrosion products from the surface of mild steel and as a result corrosion rate raises from 0.3 to 0.45 mm/year at a temperature of 80 °C and pH=4.

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Karthikeyan, S., S. S. Syed Abuthahir, A. Samsath Begum, and K. Vijaya. "Corrosion Inhibition of Mild Steel in 0.5 M H2SO4 Solution by Plant Extract of Annona squamosa." Asian Journal of Chemistry 33, no. 9 (2021): 2219–28. http://dx.doi.org/10.14233/ajchem.2021.23386.

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In aqueous solution of 0.5M H2SO4, the Annona Squamosa extract was systematically analyzed to ensure its inhibition mechanism by using potentiodynamics polarization, the weight loss method, and electrochemical impedance spectroscopy (EIS) and its inhibitory effect on mild steel corrosion. For mild steel corrosion in 0.5 M H2SO4 solution, its inhibition efficiency increases and decreases with an increase in its concentration and temperature, respectively. Potentiodynamic polarization analyses revealed that the Annona Squamosa behaves as a cathodic inhibitor. In presence of Annona Squamosa extract in 0.5 M H2SO4 solution, an increase in the activation energy of corrosion leads to a decrease in the rate of mild steel corrosion. On mild steel surfaces, the adsorption behaviour of the extract conformed to the Temkin isotherm, Langmuir isotherm and Arrhenius equation. The EIS results were correlated with the polarization findings. According to atomic force microscopy (AFM) and scanning electron microscopy (SEM), the inhibition of mild steel corrosion proceeds through the adsorption of the extract on the mild steel surface.

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Idora, M. S. Noor, M. M. Rahman, M. Ismail, and W. B. Wan Nik. "Effect of Zinc Coating Thickness on Corrosion Performance of Mild Steel in Atmospheric and Seawater Environment." Applied Mechanics and Materials 554 (June 2014): 213–17. http://dx.doi.org/10.4028/www.scientific.net/amm.554.213.

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The application of zinc coating as a protective film to the mild steel against corrosion attack in atmospheric and seawater environment was studied. The objective of this study is to evaluate the corrosion performance of mild steel coated by different thickness of zinc under salt spray and also immersion test. The corrosion measurement test was performed by weight loss and potentiodynamic polarization. From the experimental study, it was found that the corrosion rate of mild steel is inversely proportional to the zinc coating thickness. The result also showed that the corrosion rate of mild steel in the salt spray test is higher than the immersion test.

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Al-Amiery, Ahmed, Lina M. Shaker, Abdul Amir H. Kadhum, and Mohd S. Takriff. "Synthesis, characterization and gravimetric studies of novel triazole-based compound." International Journal of Low-Carbon Technologies 15, no. 2 (January 6, 2020): 164–70. http://dx.doi.org/10.1093/ijlct/ctz067.

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Abstract 4-Amino-3-(2-bromo-5-methoxyphenyl)-1H-1,2,4-triazole-5(4H)-thione (ATH) was synthesized and characterized by nuclear magnetic resonance and Fourier-transform infrared as spectroscopical techniques and elemental analysis. ATH was studied for corrosion inhibition of mild steel in corrosive environment by means of weight loss technique, scanning electron microscopy and the adsorption isotherm. ATH demonstrates a superior inhibition efficiency against corrosion of mild steel. Adsorption data fit well to a Langmuir isotherm model.

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Kadiya, H. K., and R. T. Vashi. "Progressive Corrosion Study of Metals like Mild Steel, Zinc and Aluminium in an Urban Atmosphere." E-Journal of Chemistry 6, s1 (2009): S480—S484. http://dx.doi.org/10.1155/2009/807376.

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Corrosion rate (Progressive) of mild steel (MS), zinc and aluminum have been determined under outdoor conditions of exposure at Valsad (South Gujarat) representing an urban atmosphere. Mild steel (MS), zinc and aluminium plates exposed during November 2005 indicates corrosion rate of 88, 33 and 1.4 mg/sq.dm for one month exposure period and 3668, 968 and 26.1 mg/sq.dm for mild steel, zinc and aluminium respectively for twelve months exposure period. Mild steel panels exposed vertically suffer less corrosion than those exposed at an angle of 45°. The resistivity towards the atmosphere was in the increasing order: mild steel < zinc < aluminium. Corrosion rate of these three metals found more in rainy seasons than the rate of winter and summer season

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Sezer, Esma, and İpek Öztürk. "Mild steel protection with tannic and polyaspartic acid in cooling systems." Anti-Corrosion Methods and Materials 66, no. 5 (September 2, 2019): 583–94. http://dx.doi.org/10.1108/acmm-04-2019-2105.

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Purpose Tannic acid (TA) is one of the green corrosion inhibitors for mild steel; its anti-corrosive performance in alkaline water on mild steel when it is used together with polyaspartic acid (PASA) still has not been investigated. The purpose of this study is to develop an effective, biodegradable and environment-friendly novel corrosion inhibitor based on TA and PASA as an alternative to the conventional inorganic inhibitors for mild steel in decarbonised water, which is common in cooling systems. Design/methodology/approach Corrosion inhibition mechanism is investigated by electrochemical techniques such as polarisation measurements and electrochemical impedance spectroscopy, and results were evaluated to determine the optimum inhibitor concentration for industrial applications. Additionally, practice-like conditions are carried out in pilot plant studies to simulate the conditions in cooling systems. Thus, the efficiencies of the inhibitors are evaluated through both weight loss and linear polarisation resistance measurements. Moreover, the corrosion product is characterised by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) and Fourier-transform infrared spectroscopy (FTIR) analysis. Findings TA shows high inhibition efficiency especially towards pitting corrosion for mild steel in decarbonised water. PASA addition in the cooling systems improves the inhibition efficiency of TA, and at lower concentrations of TA + PASA, it is possible to obtained better inhibition efficiency than TA alone at higher inhibitor amounts, which is essential in economic and environmental aspect. Originality/value A blended inhibitor program including TA and PASA with suggested concentrations in this work can be used as an environmental friendly treatment concept for the mild steel corrosion inhibition at cooling systems.

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Pramudita, M., Sukirno Sukirno, and M. Nasikin. "Rice Husk Extracts Ability to Reduce the Corrosion Rate of Mild Steel." International Journal of Chemical Engineering and Applications 9, no. 4 (August 2018): 143–46. http://dx.doi.org/10.18178/ijcea.2018.9.4.715.

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Bondar, Olena, Victoria Vorobyova, Мargarita Skiba, Іryna Kurmakova, Natalia Demchenko, and Оlena Chygyrynets. "Food Additives as Factor of Corrosion of Mild Steel in Neutral Solution." Chemistry & Chemical Technology 13, no. 2 (June 10, 2019): 254–60. http://dx.doi.org/10.23939/chcht13.02.254.

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Sodiki, J. I. "The Relative Corrosion Severity of Laboratory Environments on Mild Steel, Medium Carbon Steel, Brass and Aluminium." International Journal of Engineering and Technology 7, no. 6 (December 2015): 453–58. http://dx.doi.org/10.7763/ijet.2015.v7.836.

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Ashwe, A., and K. K. Ikpambese. "Study of Corrosion Inhibition Potentials of Eichhornia crassipes Leaves Extract on Mild Steel in Acidic Medium using Artificial Neural Network." NIGERIAN ANNALS OF PURE AND APPLIED SCIENCES 6 (December 28, 2015): 158–67. http://dx.doi.org/10.46912/napas.22.

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Prediction of corrosion behavior of steel in acidic environments is an essential step towards optimizing the design of equipment in any industrial setting. An artificial neural network (ANN) may be used as a reliable modeling method for simulating and predicting the corrosion behaviour. The present study has been conducted to investigate the corrosion inhibition potentials of Eichhornia crassipes (water hyacinth) leaves extract for mild steel in acidic media and to establish an appropriate ANN model for predicting corrosion behavior of mild steel in H 2 SO 4 inhibited by Eichhornia crassipes. The experimental procedure employed weight loss method for corrosion rate measurements. Results have shown that Eichhornia crassipes is an effective inhibitor for corrosion inhibition of mild steel in acidic medium. A Levenberg-Marquardt (LM) ANN with single hidden layer having five neurons was employed to simulate the corrosion behaviour. The neural network was trained using the experimental corrosion database. Finally, validity of the proposed model was tested using standard statistical parameters. Results indicate that the trained ANN model is robust for predicting corrosion behaviour of mild steel in acidic media.

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Al-Baghdadi, Shaimaa B., Ahmed A. Al-Amiery, Tayser S. Gaaz, and Abdul Amir H. Kadhum. "Terephthalohydrazide and isophthalo- hydrazide as new corrosion inhibitors for mild steel in hydrochloric acid: Experimental and theoretical approaches." Koroze a ochrana materialu 65, no. 1 (May 1, 2021): 12–22. http://dx.doi.org/10.2478/kom-2021-0002.

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Abstract Most organic corrosion inhibitors have polar groups through which the molecule can be adsorbed strongly or specifically on the metal surface. In this investigation, terephthalo- hydrazide and isophthalohydrazide were synthesized as corrosion inhibitors, and their corrosion-inhibiting properties on mild steel were evaluated in a corrosive environment by weight loss measurements. The results of corrosion experiments revealed that terephthalohydrazide and isophthalohydrazide as inhibitors controlled or reduced corrosion through adsorption mechanism and showed inhibitive efficiencies of 96.4 % and 97.2 %, respectively, at the optimum concentration of 0.5 mM. The surface morphology of the metal was evaluated by scanning electron microscopy. The terephthalohydrazide or isophthalohydrazide molecules were adsorbed on the mild steel surface, and the process of adsorption follows chemical adsorption. Quantum chemical calculations of the tested corrosion inhibitors were consistent with the experimental observations.

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Oguntade, Tomiwa I., Christiana S. Ita, Olabode Sanmi, and Daniel T. Oyekunle. "A Binary Mixture of Sesame And Castor Oil as an Ecofriendly Corrosion Inhibitor of Mild Steel In Crude Oil." Open Chemical Engineering Journal 14, no. 1 (April 22, 2020): 25–35. http://dx.doi.org/10.2174/1874123102014010025.

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Background: A binary mixture of sesame and castor oil was used for reducing the corrosion rate of mild steel in crude oil environments. This study investigated the corrosion behavior of a binary mixture of sesame and castor oil as a corrosion inhibitor for mild steel in crude oil. Different parameters such as immersion time, the concentration of inhibitor and pH were investigated for corrosion of mild steel. Methods: Experimental analysis indicates that a passive layer of the inhibitor formed over the surface of mild steel thereby reducing the corrosion rate. This was demonstrated by varying different process parameters such as the concentration of binary inhibitor, pH and time using two different statistical models; the Response Surface Methodology (RSM) and the Artificial Neural Network (ANN). Results: From the results, it was observed that ANN was a better predictive tool to determine the corrosion rate of mild steel than the RSM. Conclusion: Overall, both the models prove that relative to the process parameters used, the importance level of the parameters was Time < Concentration of binary inhibitor < pH.

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Otani, Kyohei, Masatoshi Sakairi, and Md Saiful Islam. "Influence of metal cations on inhibitor performance of gluconates in the corrosion of mild steel in fresh water." Corrosion Reviews 36, no. 1 (February 23, 2018): 105–13. http://dx.doi.org/10.1515/corrrev-2017-0047.

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AbstractThe influence of metal cations on the ability of gluconates to inhibit corrosion of mild steel in a model fresh water was investigated by electrochemical impedance spectroscopy (EIS) and immersion tests. The EIS and immersion test results showed that the corrosion inhibition of mild steel in model fresh water by gluconates was improved by metal cations that have a large value of corrosion inhibitory effect of cation, Y. The X-ray photoelectron spectroscopy (XPS) analysis showed that metal cations that have larger Y values are bonded on mild steel. It was thought that metal cations with large Y values and gluconates confer a synergistic inhibition effect on the corrosion of mild steel in model fresh water.

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Zainoldin, Zailelah, Mohamad Kamal Harun, Hadariah Bahron, and Karimah Kassim. "Electrodeposition of Salicylideneaniline and its Corrosion Behavior." Advanced Materials Research 554-556 (July 2012): 385–89. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.385.

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Electrodeposition was carried out on mild steel surface in 0.3 M sodium hydroxide solution (70% distilled water: 30% ethanol) containing 0.1 M salicylideneaniline using cyclic voltammetry and chronoamperometry techniques. Both techniques show the formation of the films on the mild steel surface. The corrosion behavior of electrodeposited mild steel was studied using electrochemical impedance spectroscopy (EIS) technique at various immersion times in 0.5 M sodium chloride solution (NaCl). The study indicates that the resistance of mild steel against corrosion increases after being electrodeposited with salicylideneaniline. However the films tend to diminished after 24 hours being immersed in 0.5 M NaCl solution.

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Begum, A. Shamitha, J. Mallika, and P. Gayathri. "Corrosion Inhibition Property of Some 1, 3, 4- Thiadiazolines on Mild Steel in Acidic Medium." E-Journal of Chemistry 7, no. 1 (2010): 185–97. http://dx.doi.org/10.1155/2010/623298.

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The present work deals with the corrosion behavior of mild steel in acidic medium. The inhibitive effect of substituted 1, 3, 4-Thiadiazol-2-amines on the corrosion of mild steel in 1 M H2SO4has been studied by weight loss and electrochemical methods. The electrochemical parameters for mild steel in acidic solution with and without inhibitor were calculated. The effect of temperature on the corrosion rate, activation energy and free energy of adsorption were also calculated. The synergistic effect has been studied by weight loss and electrochemical methods. The electrochemical parameters for mild steel in acidic solution were also calculated.

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Thusnavis, G. Rexin, T. V. Archana, K. P. Vinod Kumar, and M. Sankara Narayanan Pillai. "Seed Extract of Dypsis lutescens as Ecofriendly Corrosion Inhibitor for Mild Steel in Hydrochloric Acid Medium." International Journal of ChemTech Research 13, no. 1 (2020): 149–58. http://dx.doi.org/10.20902/ijctr.2019.130118.

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The seed extract of Dypsis lutescens, had been analyzed for mild steel corrosion inhibition in acid medium with weight loss, thermodynamic, adsorption and electrochemical parameters. The results reflected that the extract is a potential corrosion inhibitor. IR spectra and SEM photographs recorded for functional group and surface modification analysis of mild steel, were agreeing with other parameters. Entire study revealed that the inhibitor works through adsorption of its molecules over the mild steel. From this study it is inferred that the seed extract of D. lutescens is an efficient, eco-friendly and alternate corrosion inhibitor for mild steel in acid medium.

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Vo An, Quan, Tuan Anh Nguyen, Ha Tran Thi, and Que Le Xuan. "ELECTROCHEMICAL BEHAVIOR OF MILD STEEL IN HCL 1M MEDIUM WITH THE PRESENCE OF ROSE MYRTLE LEAVES EXTRACTION." Vietnam Journal of Science and Technology 56, no. 3B (September 13, 2018): 63. http://dx.doi.org/10.15625/2525-2518/56/3b/12885.

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As the growing interest on green corrosion inhibitors, plant extracts have gradually showed the potential in replacing the traditional hazardous chemicals due to the eco-friendly and economy characteristics. Previous study reported that rose myrtle leaf-extract (Rhodomyrtus tomentosa, Myrtaceae) was as an efficient corrosion inhibitor for rust removal process of mild steel in H2SO4 acid medium. This study presents the corrosion inhibition assessments of rose myrtle leaf-extract on mild steel surface in HCl 1M solution. The potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods have been used to study the corrosion behaviors of mild steel. The corrosion rate, corrosion current and corrosion potential results indicate that only small amount of the leaf-extract (2% vol.) was required for high inhibition efficiency (Hin=83.9%). By affecting on both anodic and cathodic branches of the Tafel plot, the corrosion inhibition mechanism is proposed by an adsorption forming different barriers on the steel surface.Green inhibitor, Rhodomyrtus tomentosa, steel corrosion, EIS

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Masri, Mohamad Najmi, Mohamad Fikri Samsudin, Muhammad Azwadi Sulaiman, Mazlan Mohamed, Mohamad Faiz Mohd Amin, Mohd Hazim Mohamad Amini, Mohammad Khairul Azhar Abdul Razab, et al. "Microscopic Study on the Corrosion of Underground Pipeline." Key Engineering Materials 694 (May 2016): 172–76. http://dx.doi.org/10.4028/www.scientific.net/kem.694.172.

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Corrosion on the water pipelines can potentially cause substantial human and economic losses. This paper concentrates on corrosion observation on the underground pipeline material as a part of our continuous study regarding this work. The samples which is mild steel taken from actually used pipeline at the site. Mild steels have been investigated intensively as a promising pipe material for underground pipeline due to their advantages such as high availability, low cost, environmental friendliness and high resistance to corrosion. However, their practical application exposes them to the attack of corrosion related to the soil condition. In this study, microscopic observations were performed on the surface of pipeline material using scanning electron microscope (SEM) and energy-dispersive x-ray (EDX) technique in order to study the morphology and basic composition of the corrosion, respectively. Based on the observation and visual analyses, it was determined that the surface of the mild steel was affected by continuous exposure to moist soil, which leads to pitting type of corrosion.

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36

Chigondo, Marko, and Fidelis Chigondo. "Recent Natural Corrosion Inhibitors for Mild Steel: An Overview." Journal of Chemistry 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/6208937.

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Traditionally, reduction of corrosion has been managed by various methods including cathodic protection, process control, reduction of the metal impurity content, and application of surface treatment techniques, as well as incorporation of suitable alloys. However, the use of corrosion inhibitors has proven to be the easiest and cheapest method for corrosion protection and prevention in acidic media. These inhibitors slow down the corrosion rate and thus prevent monetary losses due to metallic corrosion on industrial vessels, equipment, or surfaces. Inorganic and organic inhibitors are toxic and costly and thus recent focus has been turned to develop environmentally benign methods for corrosion retardation. Many researchers have recently focused on corrosion prevention methods using green inhibitors for mild steel in acidic solutions to mimic industrial processes. This paper provides an overview of types of corrosion, corrosion process, and mainly recent work done on the application of natural plant extracts as corrosion inhibitors for mild steel.

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Obayi, C. S., J. C. Nwobodo, S. I. Neife, and C. C. Daniel-Mkpume. "Studies on the effect of Cold Plastic Deformation and Heat Treatment on the Microstructural Arrangement and Corrosion Behaviour of Mild Steel in Acidic Media." Nigerian Journal of Environmental Sciences and Technology 3, no. 2 (October 2019): 331–41. http://dx.doi.org/10.36263/nijest.2019.02.0132.

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Mild steel is the most extensively used carbon steel for numerous industrial applications, where it is exposed to various service environments containing acids, bases and salt solutions. From industrial point of view, plastic deformation and heat treatment are among the essential manufacturing steps in mild steel processing and these steps can implicate its corrosion behaviour. This work investigated the effect of cold plastic deformation and subsequent high temperature heat treatment on the microstructure and corrosion behaviour of mild steel in two different concentrations (0.5M and 1.0M) of sulphuric acid (H2SO4), using the weight loss method. Mild steel samples were cold pressed to thickness reduction of 20%, 40% and 50% and subsequently heat treated at 700oC and 900°C and then air-cooled. The test duration lasted for 25 days and the weight loss measurements were taken at intervals of 5 days. It was observed that corrosion rates of the samples were generally higher in the 1.0M than in 0.5M acid solution. The as-received and heat-treated mild steel samples exhibited higher corrosion rates than the cold-pressed and heat-treated samples. The results indicated strongly that cold working accompanied by heat treatment improves corrosion resistance of mild steel in acidic media.

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Okewale, Akindele, and Felix Omoruwuo. "Neem Leaf Extract as a Corrosion Inhibitor on Mild Steel in Acidic Solution." International Journal of Engineering Research in Africa 35 (March 2018): 208–20. http://dx.doi.org/10.4028/www.scientific.net/jera.35.208.

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The influence of neem leaf extract on corrosion inhibition of mild steel in 0.1 M HCl solution was studied using the weight loss method. Neem leaf extract which contains the double bond, carbonyl groups, and aromatic rings functional group as shown by the GCMS, phytochemical test, and FTIR analyses is one of the good natural plant extract that can be used as corrosion inhibitor. The weight loss on surface of mild steel at various inhibitor concentrations was determined. The highest inhibition efficiency of 93.24% was achieved using the neem leaf extract as corrosion inhibitor. Adsorption mechanism was investigated using Langmuir, Temkin, and Freundlich isotherms. Inhibitor adherence on the mild steel surface was spontaneous with the negative Gibb’s free energy value obtained. The mixed type adsorption mechanism (physisorption and chemisorption) is proposed for the inhibitor adsorption on mild steel surface. The inhibitor was adsorbed on the mild steel surface through adsorption of the phytochemical components on the surface of mild steel which protects the metal surface from corroding. The corrosion rate decreases from 0.001 to 0.0002MPY with increase in inhibitor concentrations and exposure time.

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39

Lee, W., and W. G. Characklis. "Corrosion of Mild Steel Under Anaerobic Biofilm." CORROSION 49, no. 3 (March 1993): 186–99. http://dx.doi.org/10.5006/1.3316040.

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40

Gismelseed, Abbasher, S. H. Al-Harthi, M. Elzain, A. D. Al-Rawas, A. Yousif, S. Al-Saadi, I. Al-Omari, H. Widatallah, and K. Bouziane. "Atmospheric corrosion of mild steel in Oman." Hyperfine Interactions 167, no. 1-3 (November 14, 2006): 753–58. http://dx.doi.org/10.1007/s10751-006-9352-z.

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Gardiner, C. P., and R. E. Melchers. "Corrosion of mild steel in porous media." Corrosion Science 44, no. 11 (November 2002): 2459–78. http://dx.doi.org/10.1016/s0010-938x(02)00062-8.

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Reut, J., A. Öpik, and K. Idla. "Corrosion behavior of polypyrrole coated mild steel." Synthetic Metals 102, no. 1-3 (June 1999): 1392–93. http://dx.doi.org/10.1016/s0379-6779(98)01036-4.

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Volkland, Hans‐Peter, Hauke Harms, Karl Knopf, Oskar Wanner, and Alexander J. B. Zehnder. "Corrosion inhibition of mild steel by bacteria." Biofouling 15, no. 4 (September 2000): 287–97. http://dx.doi.org/10.1080/08927010009386319.

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Melchers, Robert E., and Robert Jeffrey. "Early corrosion of mild steel in seawater." Corrosion Science 47, no. 7 (July 2005): 1678–93. http://dx.doi.org/10.1016/j.corsci.2004.08.006.

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de la Fuente, D., I. Díaz, J. Simancas, B. Chico, and M. Morcillo. "Long-term atmospheric corrosion of mild steel." Corrosion Science 53, no. 2 (February 2011): 604–17. http://dx.doi.org/10.1016/j.corsci.2010.10.007.

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Al-Bghdadi, Shaimaa B., Mahdi M. Hanoon, Jafer F. Odah, Lina M. Shaker, and Ahmed A. Al-Amiery. "Benzylidene as Efficient Corrosion Inhibition of Mild Steel in Acidic Solution." Proceedings 41, no. 1 (November 14, 2019): 27. http://dx.doi.org/10.3390/ecsoc-23-06472.

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A New benzylidene derivative namely benzylidene-5-phenyl-1,3,4-thiadiazol-2-amine (BPTA), was successfully synthesized and characterized using Fourier Transform Infrared Spectroscopy, Nuclear Magnetic Resonance and elemental analysis (CHN) techniques. The inhibition efficiency of BPTA on mild steel corrosion in 1.0 N HCl was tested at various temperatures. The methodological work was achieved by gravimetric method complemented with morphological investigation. The concentrations of inhibitor were 0.1, 0.2, 0.3, 0.4 and 0.5 mM at the temperatures 303, 313, 323 and 333 K. The BPTA, molecules as become superior corrosion inhibitor with 92% inhibition efficiency of mild steel coupon in the acidic environment. The inhibition efficiency increased with increasing concentrations of BPTA and the excellent efficiency was performed with the 0.5 mM concentration and followed with 0.4 mM. In acidic environment, the 0.5 and 0.4 mM gave the optimum performance with weight loss technique and scanning electron microscopy analysis. On the other hand, the inhibition efficiency decreased with the increase of temperature. Results of BPTA indicated mixed type inhibitor and the adsorption on the mild steels surface obeys the Langmuir adsorption isotherm. It was found that the BPTA performance depend on the concentration and the solution temperature. Quantum chemical calculations have been done to correlate the electronic characteristics of BPTA with the corrosive inhibitive impact. Experimental and theoretical results are in good agreement.

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Jiang, Wen Long, Wei Zhou, Ji Fei Ying, Kong Chao Shen, Xing Yu Gao, Fu Qiang Guo, Yan Ming Gao, and Tie Ying Yang. "Corrosion Inhibition on Mild Steel Using PFOA Additives." Key Engineering Materials 727 (January 2017): 59–66. http://dx.doi.org/10.4028/www.scientific.net/kem.727.59.

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In this paper, the anticorrosive properties of perfluorooctanoic acid (PFOA) on Q235 mild steel corrosion were estimated in simulated seawater. XRD and EDS results showed that PFOA could penetrate the rust layer and adsorb on the surface of steel and destroy rust layer. Our polarization measurements revealed that PFOA is a useful inhibitor, with a more pronounced anode effect, while impedance results also indicated successful adsorption of the PFOA species on the steel surface. Laser confocal scanning microscope studies give the evidence that corrosion resistance of the treated samples improved compared to the untreated samples. Molecular simulation technique was used to confirm the ability of PFOA to decrease corrosion. The 150 g/L concentration of PFOA showed the most significant improvement in the anticorrosive property.

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Rajkumar, D., and D. Prasannan. "Comparative Studies on Inhibitor Efficiency in Mild Steel and Iron." International Journal of Engineering & Technology 7, no. 2.24 (April 25, 2018): 130. http://dx.doi.org/10.14419/ijet.v7i2.24.12017.

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Metals generally corrode mild steel is an alloy form of from which undergoes corrosion easily in acidic medium. The corrosion products are formed when a metal give its electrons to the oxidizing substances, the organic compounds containing sulphur, nitrogen and oxygen are known to be effectiveness depends on the electron density at the functional groups. We need to reduce the corrosion of steel by adding inhibitor. Tensile strength of steel varies depends on the corrosion. Thus, the aim of this project is to determine the inhibitor efficiency of thiourea, urea, and hydroquinone for the corrosion of normal steel and iron in common HCL medium consists of different concentration of inhibitor.

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P, Sounthari, Kiruthika A, Saranya J, Parameswari K, and Chitra S. "1,3,4-Oxadiazole Dimers: New and Effective corrosion inhibitors for mild steel in sulphuric acid solution." JOURNAL OF ADVANCES IN CHEMISTRY 10, no. 1 (May 30, 2014): 2126–45. http://dx.doi.org/10.24297/jac.v10i1.5593.

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The corrosion inhibition property of 1,3,4-Oxadiazole dimers have been investigated for mild steel in acidic environment using gravimetric method, Tafel polarization, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), atomic absorption spectroscopy (AAS) and adsorption isotherm. The results revealed that 1,3,4-Oxadiazole dimers had excellent corrosion inhibition property for mild steel in 1M H2SO4 acid media and its inhibitive efficiency was more than 99% even with a low concentration of 1000ppm.The adsorption of the organic compounds on the mild steel surface obeyed Langmuir adsorption isotherm. IR spectra and SEM proved the adsorption of organic inhibitors and the formation of corrosion products on the mild steel surface.

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Sangeetha, Y., S. Meenakshi, and C. Sairam Sundaram. "Electrochemical behaviour of acetyl G as corrosion inhibitor for mild steel in acid medium." Pigment & Resin Technology 44, no. 6 (November 2, 2015): 371–78. http://dx.doi.org/10.1108/prt-10-2014-0087.

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Purpose – The purpose of this paper is to develop an eco-friendly corrosion inhibitor for mild steel in 1 M HCl. Design/methodology/approach – A pharmaceutical drug acetyl G was investigated for its corrosion inhibition efficiency using weight loss method, potentiodynamic polarisation and electrochemical impedance spectroscopy. Findings – The inhibition efficiency increased with increase in inhibitor concentration. Results from polarisation studies revealed mixed type of inhibition. Impedance studies, scanning electron microscopy and Fourier transform spectroscopy confirm the adsorption of inhibitor on the mild steel surface. Research limitations/implications – The drug acetyl G has sulphur and nitrogen atoms which effectively block the corrosion of mild steel and is non-toxic and has good inhibition efficiency. Practical implications – This method provides an excellent, non-toxic and cost-effective material as a corrosion inhibitor for mild steel in acid medium. Originality/value – Application of this drug as a corrosion inhibitor has not been reported yet in the literature. Replacing the organic inhibitors, this green inhibitor shows excellent inhibition efficiency. This is adsorbed excellently on the mild steel surface due to the presence of long chain and hetero atoms. Thus, the drug retards the corrosion reaction.

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Journal articles on the topic 'Mild steel – Corrosion'

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