热镀锌板在汽车涂装线上出现电泳麻点的原因分析  

Analysis on causes of formation of pits on hot-dip galvanized steel sheet after electrophoresis in an automobile painting line

作　　者：董蓓 王刚[2] 周郑 DONG Bei;WANG Gang;ZHOU Zheng(R&D Center of Wuhan Iron&Steel Co.,Ltd.,Baosteel Central Research Institute,Wuhan 430081,China;Dongfeng Peugeot Citroen Automobile Company Ltd.,Wuhan 430081,China)

机构地区：[1]宝钢股份中央研究院(武钢有限技术中心),湖北武汉430081 [2]神龙汽车有限公司,湖北武汉430081

出　　处：《电镀与涂饰》2021年第8期622-626,共5页Electroplating & Finishing

摘　　要：某热镀锌板在汽车涂装线上电泳后出现麻点。通过涂装线现场调查及缺陷样板微观形貌和成分分析,确定麻点产生的原因是涂装前处理异常,使得磷化结晶异常,甚至无法成膜,导致后续电泳存在不均匀沉积。调整涂装前处理工艺参数后问题得以解决。Some pits appeared on the hot-dip galvanized steel sheet after electrophoretic coating in an automobile painting line.The causes of the formation of pits were found by investigation on the painting line,as well as micromorphology and composition analysis of the sampled hot-dip galvanized steel sheet.Abnormal crystallization occurred during phosphating,or even failure in film formation due to the ineffective pretreatment of hot-dip galvanized steel sheet prior to painting,leading to ununiform deposition during the subsequent electrophoresis.The problem was solved by adjusting the process parameters of pretreatment.

关 键 词：汽车涂装 电泳 磷化 脱脂 麻点缺陷 故障排除 

分 类 号：TQ153.15[化学工程—电化学工业] U445.58[建筑科学—桥梁与隧道工程]