Electroplating solution for electroplating decorative trivalent chromium on surface of electronic product

Abstract

The invention discloses an electroplating solution for electroplating decorative trivalent chromium on the surface of an electronic product. The electroplating solution consists of the following components: 86-90g / L of chromium chloride, 74-78g / L of urea, 52-56g / L of ammonium bromide, 36-40g / L of sodium chloride, 12-14g / L of boric acid, 160-170ml / L of methanol, 80-100ml / L of formic acid, 0.03-0.04g / L of sodium dodecyl sulfate, 8-10g / L of iron chloride and the balance of water.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a plating solution for electroplating decorative trivalent chromium on the surface of electronic products. Background technique [0002] Decorative chrome coating has become one of the most widely used decorative coatings in the industry due to its good gloss and corrosion resistance. However, for a long time, the traditional hexavalent chromium electroplating process has many insurmountable shortcomings, such as poor dispersion and coverage, low current efficiency, high electroplating temperature, serious pollution to people and the environment during the electroplating process, and difficult post-treatment of the plating solution. During the hexavalent chromium electrodeposition process, waste water and waste gas contain a large amount of hexavalent chromium, which causes great pollution to the environment, and can cause human kidney failure, heart failure, leukemia, and...

AI Technical Summary

Problems solved by technology

Vapor deposition technology has the advantages of low pollution and uniform deposition, but its high cost and poor coverage ability cannot be used for the deposition of irregular workpieces and inner walls of pipe fittings, and it is not conducive to large-scale industrial production

Electrodeposited alloy instead of chromium coating mainly includes Zn-Sn-Co, Ni-P, Ni-W and other ternary alloys. This method has little pollution, but the stability of the plating solution is poor and the operating conditions are narrow.

In contrast, the toxicity of the decorative trivalent chromium electrodeposition process is only 1% of that of the hexavalent chromium electroplating process, with low energy consumption and high efficiency, but its disadvantages are poor gloss of the coating and poor stability of the plating solution

Although the industrial promotion of decorative trivalent chromium electroplating process has been reported abroad, there is no report on domestic decorative trivalent chromium electroplating process that has independent intellectual property rights and can be applied to industrial production.