Effects of increase extent of voltage on wear and corrosion resistance of micro-arc oxidation coatings on AZ91D alloy

来源期刊：中国有色金属学报(英文版)2008年增刊第1期

论文作者：吕维玲 陈体军 马颖 徐卫军 杨健 郝远

文章页码：354 - 360

Key words：AZ91D magnesium alloy; micro-arc oxidation; increase extent; corrosion resistance; wear resistance

Abstract: 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.

基金信息：National Basic Research Program of China
Science and Technology Significant Special Item of Gansu Province, China
International Scientific and Technological Cooperation Plan Item between Provinces
Spring Light Plan Item of Ministry of Education, China