We study the structure and electrochemical properties of AZ31 alloy obtained by the classical procedure of duo rolling as well as by the methods of extrusion and thixoforming in the intact state and with oxideceramic coatings synthesized in plasma electrolytes. It is shown that, for different technologies of the production of the alloy, the Mg17(Al, Zn)12 intermetallic inclusions formed in this alloy have different sizes and shapes. The largest inclusions pass into the plasma-electrolyte oxide-ceramic coating and play the role of cathodes in corrosion processes. The alloy produced by the method of thixoforming has the highest electrochemical properties both in the intact state and with oxide-ceramic coatings. Independently of the method of production, the plasma-electrolyte oxide coatings improve the corrosion resistance of the alloy by 2–3 orders of magnitude.
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References
K. U. Kainer, Technology and Engineering. Protection for Magnesium, Magnesium Alloys and Their Applications, Wiley-VCH (2006).
M. B. Al’tman, M. E. Drits, M. A. Timonova, and M. V. Chukhrov, Magnesium Alloys: A Handbook [in Russian], Vol. 1, Metallurgiya, Moscow (1978).
C. Kirbi, “Galvanic and crevice corrosion effect in Magnox A180 alloy,” Corr. Sci., 27, No. 6, 567–583 (1987).
Y.-L. Cheng, T.-W. Qin, H.-M. Wang, and Zh. Zhang, “Comparison of corrosion behaviors of AZ31, AZ91, AM60, and ZK60 magnesium alloys,” Trans. Nonferrous Met. Soc. China, 19, 517−524 (2009).
M. A. Timonova, Corrosion and Protection of Magnesium Alloys [in Russian], Mashinostroenie, Moscow (1964).
I. I. Gur’ev and M. V. Chukhrov, Magnesium Alloys: A Handbook [in Russian], Vol. 2, Metallurgiya, Moscow (1978).
M. Marya, L. G. Hector, R. Verma, and W. Tong, “Microstructural effects of AZ31 magnesium alloy on its tensile deformation and failure behaviors,” Mater. Sci. Eng., A 418, 341–356 (2006).
I. Ozdemir, S. Muecklich, H. Podlesak, and B. Wielage, “Thixoforming of AA 2017 aluminum alloy composites,” J. Mater. Proc. Technol., V211, No. 7, 1260–1267 (2011).
M. D. Klapkiv, Determination of the Physicochemical Parameters of the Process of Synthesis in Plasma Electrolytes of Oxide-Ceramic Coatings on Aluminum Alloys [in Ukrainian], Author’s Abstract of Candidate-Degree Thesis (Engineering), Lviv (1996).
V. N. Kabanov and D. V. Kokoulina, “On the mechanism of anodic dissolution of magnesium,” Dokl. Akad. Nauk SSSR, 120, No. 3, 558–561 (1958).
R. Tunold, H. Holtan, M.-B. H. Berge, et al., “The corrosion of magnesium in aqueous solution containing chloride ions,” Corr. Sci., 17, No. 4, 353–365 (1977).
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 51, No. 1, pp. 102–107, January–February, 2015.
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Pokhmurs’ka, H.V., Klapkiv, M.D., Posuvailo, V.M. et al. Electrochemical Properties of the PEO Coatings on AZ31 Magnesium Alloy Produced by Different Technologies. Mater Sci 51, 114–120 (2015). https://doi.org/10.1007/s11003-015-9816-x
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DOI: https://doi.org/10.1007/s11003-015-9816-x