镁合金涂装保护体系失效特性及铬酸盐转化膜的影响  

DEGRADATION OF PAINTS ON MAGNESIUM ALLOYS AND INFLUENCE OF CHROMATE CONVERSION COATING

作　　者：高瑾[1] 涂运骅[1] 李久青[1] 

机构地区：[1]北京科技大学材料科学与工程学院

出　　处：《腐蚀科学与防护技术》2005年第3期169-171,共3页Corrosion Science and Protection Technology

基　　金：国家自然科学基金资助(No.50122118)

摘　　要：对镁合金/有机涂层、碳钢/有机涂层及镁合金/铬酸盐转化膜/有机涂层等3种涂装体系进行了盐雾试验,结果表明,镁合金直接涂装的试样涂层失效远比碳钢迅速;铬酸盐处理大大提高了镁合金涂装保护体系的寿命.结合金属/涂层界面附着力测试,从界面反应与吸附等角度,对镁合金涂装体系的失效特性进行了分析;认为对于镁合金表面涂装保护体系,转化膜处理过程是必要的.The degradation of three finishing systems,carbon steel/paint,magne sium alloy/paint,magnesium/chromate conversion coating(ccc)/paint,was studied by salt spray test.The result showed that painted magnesium alloys blistered mu ch more quickly than painted carbon steel while painted magnesium alloys with ch romate conversion coatings showed good anticorrosion properties.The result was analyzed from the aspect of the adhesion of metal/coating interface.Paint base such as chromate conversion coating was necessary to the paint finishing of magn esium alloys.

关 键 词：铬酸盐转化膜 保护体系 失效特性 镁合金 有机涂层 涂装体系 铬酸盐处理 盐雾试验 涂层失效 涂层界面 界面反应 表面涂装 处理过程 力测试 碳钢 金属 

分 类 号：TG178[金属学及工艺—金属表面处理] D923.8[金属学及工艺—金属学]