李晓静1, 2（1.河南工业职业技术学院，河南 南阳 473009；2.河南省柔性制造重点实验室，河南 南阳 473009）
文章编号：1004 – 227X (2018) 16 – 0725 – 03
Countermeasures to a case of poor brightness problem in electroplating of decorative chromium coatings// LI Xiao-jing
Abstract: The causes of poor brightness defect for decorative chromium coating on a type of end cap were analyzed from several respects including mass concentration ratio of chromic anhydride to sulfuric acid, trivalent chromium ion content,metal impurity content, nitrate ion content, bath temperature, and anode’s conductivity. The results of site investigation and analysis showed that the main causes were as follows: too high mass concentration ratio of chromic anhydride to sulfuric acid,too many of trivalent chromium ions, contamination with metal impurities, and poor conductivity of anode. The problem was solved successfully by taking some corresponding measures.
Keywords: chromium electroplating; brightness; defect; bath composition; anode; troubleshooting
Author’s address: Henan Polytechnic Institute, Nanyang 473009, China