AZ91镁合金磷酸盐-锰酸盐化学转化膜性能的研究  

Properties of Phosphate-Manganate Chemical Conversion Coating on AZ91 Magnesium Alloy

作　　者：张换红 李广宇[1] 孔冰[1] 邵忠财[1] 夏吉利 

机构地区：[1]沈阳理工大学环境与化学工程学院,辽宁沈阳110159

出　　处：《电镀与环保》2016年第2期27-29,共3页Electroplating & Pollution Control

摘　　要：采用磷酸盐-锰酸盐体系化学转化方法在镁合金表面制备了一层无铬转化膜。采用扫描电镜、X射线衍射、电化学测试、盐水浸泡试验等手段,对转化膜的形貌、成分及耐蚀性进行了检测。结果表明:制备的磷酸盐-锰酸盐转化膜可以明显提高镁合金的耐蚀性。Chrome-free conversion coating was prepared on magnesium alloy using chemical conversion method in phosphate-manganate electrolyte system. The morphology, compositions and corrosion resistance of conversion coating were tested by scanning electron microscopy, X-ray diffraction, electrochemical measurement and salt solution immersion test. Results showed that the prepared phosphate-manganate conversion coating can significantly improve the corrosion resistance of magnesium alloy.

关 键 词：AZ91镁合金 无铬 化学转化膜 耐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]