Title: Low cost, little contaminated, high performance, micro-cracked chrome plating process
Application Number: 87100409 Application Date: 1987.01.26
Publication Number: 1020129 Publication Date: 1988.08.10
Approval Pub. Date: Granted Pub. Date: 1990.04.04
International Classifi-cation: C25D3/04
Applicant(s) Name: Analysis and Testing Center on Physics and Chemist Address:
Inventor(s) Name:
Attorney & Agent: WANG DEZHEN
Abstract:
     The solution of chromic acid contains sulfuric acid or alkaline metal, alkaline earth metal and ammonium sulfates; fluoroboric acid or alkaline metal, alkaline earth metal and ammonium fluoroboratesi selenious acid, selenic acid, soluble oxides of selenium or their salts; dodecylbenzene sulfonate, etc.. The process is provided with a DC source and a LC filtering device to produce a stabilized, constant and smoothed current, in order to make the plating cracks fine, dense and continuous with high covering power and bright color.
Time: 8