AZ31变形镁合金锰系转化膜溶液中锰消耗对膜性能的影响  

Effect of Mn^(2+) Consumption in Phosphate Conversion Solution on Performance of Phosphorized Films on AZ31 Magnesium Alloy Surface

作　　者：刘锋[1] 单大勇[1] 曾荣昌[2] 张津[2] 韩恩厚[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016 [2]重庆理工大学材料科学与工程学院,重庆400050

出　　处：《腐蚀科学与防护技术》2010年第5期377-379,共3页Corrosion Science and Protection Technology

基　　金：国家重点基础研究发展规划项目(2007CB613705);重庆市科技攻关计划资助项目(CS7C;2007AC4073)资助

摘　　要：应用化学分析方法对镁合金转化膜溶液中锰离子的浓度进行分析,使用电化学工作站和SEM对膜层的耐蚀性、形貌和成分进行表征.结果表明:随着处理面积的增加,锰离子浓度线性减少,耐蚀性变化范围不大;当处理面积达到100 dm^2/L后,膜层表面微观裂纹变得较宽.Chemical analysis method was used to determine the Mn^（2＋） consumption due to phosphorization of AZ31 Mg alloy in a magnesium phosphate conversion solution.Then electrochemical test and SEM were employed to examined the corrosion resistance and the morphology of the conversion films.Results showed that with the increase amount of treated surface area,the concentration of Mn^（2＋） decreased linearly but the corrosion resistance of the phosphorized films did not change obviously;however,when the amount of treated surface area exceed 100 dm^2/L, micro cracks in the coating became wide.

关 键 词：锰离子 镁合金 转化膜处理液 耐蚀性 

分 类 号：TG146.22[一般工业技术—材料科学与工程]