【摘要】 研究了硅酸盐体系中加压幅度对AZ91D镁合金微弧氧化膜层结构及耐磨、耐蚀性能的影响。结果表明:随着加压幅度的增大,微弧氧化膜层的厚度、孔隙度和结合力都呈先增大后减小的趋势,且都在加压幅度为20V时出现了最大值;粗糙度随着加压幅度的增大而增大。当加压幅度不小于25V时微弧氧化膜层耐蚀能力强。更多还原

【Abstract】 The effects of increase extent of voltage on microstructures and corrosion resistance of micro-arc oxidation (MAO) coatings for AZ91D magnesium alloy in silicate electrolyte were investigated. The results showed that with increase of the voltage increase extent, all of the thickness, porosity and bonding force of MAO coating first increased, and then decreased. These parameters were all up to their maximum values when the voltage increase extent was 20 V. However, the roughness of the coatings was always increased with the increasing of voltage increase extent. The coating had the optimum corrosion resistance when voltage increase extent was not below 25V.更多还原