Abstract：ZK60 Mg alloys were micro-arc oxidated in sodium hydroxide electrolyte. The voltage-time curves were analyzed and the effects of oxidation current and oxidation time on microstructure and thickness of micro-arc oxidation layer were studied. The corrosion resistance of oxidation layer was measured. The results show that，the thickness and roughness of layers increase and there are big pores in the layers with the increase of oxidation current and oxidation time. The quality of layers becomes poor. In sodium hydroxide electrolyte, after micro-arc oxidated at current of 3 A for 3 min, the oxidation film quality is best with the thickness of 19. 8 μm. The oxidation film was consisted of MgO phase after micro-arc oxidation by XRD analysis. It was found that the weight of oxidated samples increased firstly and decreased later with micro-arc oxidation. But the weight loss, amount of hydrogen evolution and pH change are all less than those of the samples without micro-arc oxidation, which shows that the corrosion resistance of ZK60 Mg alloys is improved after micro-arc oxidation.
收稿日期: 2014-05-28
出版日期: 2014-08-14
基金资助:863;辽宁省自然科学基金;辽宁省高等学校杰出青年学者成长计划
通讯作者:
于景媛
E-mail: yujingyuan79@163.com
引用本文:
于景媛，李强，张峰峰，王新宇. ZK60镁合金微弧氧化改性研究[J]. , 2014, 21(4): 22-27.
YU Jing-yuan, LI Qiang, ZHANG Feng-feng,WANG Xin-yu. Study on Micro-Arc Oxidation Modification of ZK60 Mg Alloys. , 2014, 21(4): 22-27.
2014, Vol. 21 
