Abstract

The synthesis of ceramic coatings via conversion of metallic surface is the main route of corrosion resistance in the magnesium alloys. Using ceramic nano-particles as sealant in these coatings is very useful. In this study, the effect of applied current density and treatment duration on the alumina nanoparticle incorporation, corrosion resistance, and wear behavior of plasma electrolytic oxidation coating on AZ31 alloy was investigated. The results showed that the highest incorporation of nanoparticles occurs at a current density of 100 mA/cm² during 10 min while at higher current densities or treatment durations, the eruption of molten oxide prevents the embedding of nanoparticles inside the coating. The high incorporation of nanoparticles increased the homogeneity and compaction of the coating which caused the highest corrosion and wear resistance.

中文翻译：

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AZ31镁合金上PEO纳米复合涂层的评价

摘要

通过金属表面转化合成陶瓷涂层是镁合金耐腐蚀性能的主要途径。在这些涂层中使用陶瓷纳米颗粒作为密封剂非常有用。在这项研究中，研究了施加的电流密度和处理时间对 AZ31 合金等离子电解氧化涂层的氧化铝纳米颗粒掺入、耐腐蚀性和磨损行为的影响。结果表明，纳米粒子的最高结合发生在 100 mA/cm ²的电流密度下在 10 分钟内，在更高的电流密度或处理持续时间下，熔融氧化物的喷发阻止了纳米粒子嵌入涂层内。纳米粒子的高掺入增加了涂层的均匀性和压实度，从而导致最高的耐腐蚀性和耐磨性。