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Growth Kinetics and Corrosion Protection Properties of Plasma Electrolytic Oxidation Coatings on Biodegradable Mg−2% Sr Alloy
Surface Engineering and Applied Electrochemistry Pub Date : 2020-04-06 , DOI: 10.3103/s1068375520010111
D. M. Lazarev , R. G. Farrakhov , V. R. Mukaeva , O. B. Kulyasova , E. V. Parfenov , A. L. Yerokhin

Abstract

The growth kinetics of plasma electrolytic oxidation coatings on biodegradable Mg−2% Sr alloy with coarse- and ultrafine-grain structures was evaluated. The parameters characterizing the coating growth kinetic were estimated for the alloys with different structures on the basis of a dissolution/deposition model, and their correlation with the coating properties was demonstrated. The coating morphology and phase composition were related to the protective properties of the alloys and investigated electrochemically in the Ringer’s solution, using uncoated and coated samples. Equivalent circuits modeling “alloy−electrolyte” and “alloy−coating−electrolyte” systems were developed. The PEO coating produced on the alloy with the ultra-fine grain structure displayed the best protective properties.


中文翻译:

可生物降解的Mg-2%Sr合金上等离子体电解氧化涂层的生长动力学和腐蚀防护性能

摘要

评价了具有粗细结构和超细结构的可生物降解的Mg-2%Sr合金上等离子体电解氧化涂层的生长动力学。根据溶解/沉积模型估算了具有不同结构的合金的表征涂层生长动力学的参数,并证明了它们与涂层性能的相关性。涂层的形态和相组成与合金的保护性能有关,并在林格氏溶液中使用未涂覆和涂覆的样品进行电化学研究。开发了模拟“合金-电解质”和“合金-涂层-电解质”系统的等效电路。在具有超细晶粒结构的合金上生产的PEO涂层显示出最佳的保护性能。
更新日期:2020-04-06
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