6063铝合金化学导电氧化后出现花斑的原因分析和解决措施  

Cause analysis and solution of piebald defect on 6063 aluminum alloy after chemical conductive oxidation

作　　者：钱建国[1] 祁建国[1] QIAN Jian-guo;QI Jian-guo(Nanjing Changjiang Electronics Group Co.,Ltd.,Nanjing 210038,China)

机构地区：[1]南京长江电子信息产业集团有限公司,江苏南京210038

出　　处：《电镀与涂饰》2018年第15期694-697,共4页Electroplating & Finishing

摘　　要：6063铝合金壳体化学导电氧化处理(即铬酸盐转化)后表面经常出现花斑,严重影响产品的美观。6063铝合金的化学成分、钎焊过程和基于Na OH的碱性化学除油前处理是最主要的影响因素。改用以下碱性化学除油工艺可以解决该问题:Na3PO4 40~60 g/L,Na2CO3 30~40 g/L,OP乳化剂少量,操作温度60~70°C。The piebald defect often occurs on the surface of 6063 aluminum alloy shell after chemical conductive oxidation,i.e.chromate conversion treatment,which seriously affects the appearance of product.The chemical composition of 6063 aluminum alloy,brazing process,and NaOH-based chemical alkaline degreasing pretreatment are the most important factors.The following improved chemical alkaline degreasing process can be used to solve the problem:Na3PO4 40-60 g/L,Na2CO3 30-40 g/L,a small amount of OP emulsifier,and operation temperature 60-70°C.

关 键 词：铝合金 化学导电氧化 铬酸盐转化膜 花斑缺陷 碱性除油 故障处理 

分 类 号：TG174.451[金属学及工艺—金属表面处理] TG178[金属学及工艺—金属学]