Chrome electroplating solution

Abstract

The invention discloses a chrome electroplating solution which comprises 5-20 g/L chromic sulfate, 10-50 g/L potassium phosphate, 1-10 g/L ammonium bromide, 15-50 g/L oxalic acid, 5-30 g/L sodium hypophosphite, 0.5-2 g/L stannous sulfate, 5-40 g/L acetic acid, 1-10 g/L citric acid and the balance of water. The invention has the advantages of reasonable formula, high binding strength (due to the adoption of the citric acid as a stabilizer for preventing the coating from shedding), and high surface smoothness; and the sodium hypophosphite can effectively prevent the component in the solution from being converted into toxic substance hexavalent chrome ions.

Description

technical field [0001] The invention belongs to the technical field of electroplating, and in particular relates to an electroplating chromium solution. Background technique [0002] Metal chrome plating has high hardness, corrosion resistance and excellent wear resistance, and is widely used in the surface treatment of mechanical parts. The liquid is difficult to deal with and pollutes the environment. The chrome plating process is complicated, and the efficiency is low and the work is stable and difficult to control. Contents of the invention [0003] The purpose of the present invention is to provide an electroplating chromium solution with reasonable formula, good stability, little pollution, and high-quality surface finish of the produced product. [0004] Technical solution of the present invention is: [0005] A chromium electroplating solution, characterized in that: it comprises the following components in proportion by weight, chromium sulfate 5-20g / L, potassiu...

AI Technical Summary

Problems solved by technology

[0002] Metal chrome plating has high hardness, corrosion resistance and excellent wear resistance, and is widely used in the surface treatment of mechanical parts. The liquid is