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202104007.pdf
文章编号： 1672-6987（2021）04-0047-07； DOI： 10.16351/j.1672-6987.2021.04.007
杨帅康， 孙瑞雪*(青岛科技大学 材料科学与工程学院，山东 青岛 266042)
摘要： 采用微弧氧化法，以AZ31B镁合金为基体，在其表面制备均匀的微弧氧化涂层并对其进行封孔处理来提高其耐蚀性。通过扫描电子显微镜(SEM)及能谱分析(EDS)研究了微弧氧化涂层的表面形貌及元素组成，通过电化学测试及浸泡实验研究了涂层的耐腐蚀性能。结果表明：镁合金表面微弧氧化涂层呈现典型的多孔结构，涂层厚度约为2 μm;当硅烷水解液中硅烷体积占比为10%时封孔效果最佳，涂层表面的孔洞可以被硅烷膜有效覆盖。经封孔处理后的试样的耐腐蚀性能得到大幅度提高。
关键词： AZ31B； 微弧氧化； 封孔处理； 硅烷化； 耐腐蚀性
中图分类号： TG 146.2+2文献标志码： A
引用格式： 杨帅康， 孙瑞雪. AZ31B镁合金表面微弧氧化涂层的制备及其封孔处理［J］. 青岛科技大学学报(自然科学版), 2021, 42(4): 47-53.
YANG Shuaikang, SUN Ruixue. Preparation of micro-arc oxidation coating on AZ31B magnesium alloy and its sealing treatment［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2021， 42（4）： 47-53.
Preparation of Micro-arc Oxidation Coating on AZ31B Magnesium
Alloy and Its Sealing Treatment
YANG Shuaikang, SUN Ruixue
(College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: In this paper, a uniform micro-arc oxidation coating was prepared on AZ31B magnesium alloy. And the subsequent sealing treatment was performed on this micro-arc oxidation coating to improve its corrosion resistance. The surface morphology and element composition of the micro-arc oxidation coating were studied by scanning electron microscope (SEM) and X-ray energy spectrum analysis (EDS). The corrosion resistance of the coating was studied by electrochemical test and immersion experiment. The results show that the micro-arc oxidation coating on the surface of the magnesium alloy has a typical porous structure. The thickness of the coating is about 2 μm. When the volume of silane in the silane hydrolysate is 10%, the sealing effect is the best, and the pores on the coating surface can be effectively covered by the silane film. The corrosion resistance of the sample after the sealing treatment has been greatly improved.
Key words: AZ31B; micro-arc oxidation; sealing treatment; silanization; corrosion resistance
收稿日期： 2020-06-01
基金项目： 山东省自然科学基金项目（ZR2014EMM019）.
作者简介： 杨帅康（1997—），男，硕士研究生.*通信联系人.
