摘要
采用化学转化处理的方法,在AZ91D镁合金的表面制备了均匀致密的钙系磷化膜,其中磷化液配方中不含铬、氟及亚硝酸盐等对环境有害的离子。通过场发射扫描电子显微镜和X射线衍射仪研究了磷化时间及温度对磷化膜结构和相组成的影响。结果表明:磷化时间为20min,磷化温度为40℃时,所得到的磷化膜的致密性和均匀性较好。与空白基体相比,经磷化处理后的镁合金在3.5%NaCl溶液中的耐腐蚀性能明显提高。
An environment-friendly phosphate conversion coating free of chromate, fluorides, and nitrite was developed on AZ91D alloy through a facile chemical deposition method. Influence of phosphating time and temperature on the morphology and phase composition of magnesium alloy was investigated by field emission scanning electron microscopy and X-ray diffraction （XRD）. The results indicated that when the phosphating time was 20 min and temperature was 40 ℃, the phosphate coating was dense and uniform. Compared with the bare AZ91D substrate, the corrosion resistance of the phosphate coating was improved greatly in 3.5 % NaCl solution.
出处
《青岛科技大学学报（自然科学版）》
CAS
北大核心
2014年第5期485-488,共4页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
山东省优秀中青年科学家科研奖励基金项目(BS2010CL018)
关键词
镁合金
钙系磷化膜
耐蚀性
电化学测试
magnesium alloy
calcium phosphate coating
corrosion resistance
electrochemical test
