摘要
The effects of increase extent of voltage on the wear resistance and corrosion resistance of micro-arc oxidation(MAO) coatings on AZ91D magnesium alloy were investigated in silicate electrolyte.The results show that with increasing extent of voltage, both of the thickness and bonding force of MAO coatings first increase,and then decrease.These parameters are all up to their maximum values when the increase extent of voltage is 20 V.The roughness of the coatings always increases.The coating has the best corrosion resistance when the increase extent of voltage is not below 25 V,and the coating has the best wear resistance when the increase extent of voltage is 10 V.The wear mechanisms for the micro-arc oxidation are abrasive wear and micromachining wear. These are related to their microstructures.
The effects of increase extent of voltage on the wear resistance and corrosion resistance of micro-arc oxidation （MAO） coatings on AZ91D magnesium alloy were investigated in silicate electrolyte. The results show that with increasing extent of voltage, both of the thickness and bonding force of MAO coatings first increase, and then decrease. These parameters are all up to their maximum values when the increase extent of voltage is 20 V. The roughness of the coatings always increases. The coating has the best corrosion resistance when the increase extent of voltage is not below 25 V, and the coating has the best wear resistance when the increase extent of voltage is 10 V. The wear mechanisms for the micro-arc oxidation are abrasive wear and micromachining wear. These are related to their microstructures.
出处
《中国有色金属学会会刊：英文版》
CSCD
2008年第A01期354-360,共7页
Transactions of Nonferrous Metals Society of China
基金
Project(2007CB613700)supported by National Basic Research Program of China
Project(0702GKDA024)supported by Science andTechnology Significant Special Item of Gansu Province,China
Project(0708WCGA151)supported by International Scientific andTechnological Cooperation Plan Item between Provinces
Project(Z2006-1-62002)supported by Spring Light Plan Item of Ministry ofEducation,China
关键词
AZ91D合金
镁合金
金属表面
热处理
AZ91D magnesium alloy
micro-arc oxidation
increase extent
corrosion resistance
wear resistance
