Production method for copper casting coloring agent

Abstract

The invention discloses a copper casting coloring agent. The copper casting coloring agent comprises, 50-100 g / L of sodium hydroxide, 50-100 g / L ammonium molybdate, 50-100 mL / L ammonia water, 15-30 g / L sodium bicarbonate, 20-40 g / L potassium peroxodisulfate, 50-100 g / L sodium nitrate and 5-10 g / L thiourea. The coloring agent is water-soluble, low in manufacturing cost, uniform in coloration, softin color, not easy to fall off and free of discoloring.

Description

technical field [0001] The invention belongs to colorants, in particular to a colorant for copper castings. Background technique [0002] After the copper castings are cleaned, the excess is cut and removed, and the surface is sandblasted, assembled according to the structure, the joints are welded by argon arc welding, and finally coloring treatment is required. At present, the coloring agent for copper castings is not water-resistant and easy to fall off. Contents of the invention [0003] In order to overcome the above-mentioned defects in the prior art, the object of the present invention is to provide a coloring agent for copper castings, which is easy to color. [0004] The colorant for copper castings provided by the invention has a formula of: 50-100g / L sodium hydroxide, 50-100g / L ammonium molybdate, 50-100mL / L ammonia water, 15-30g / L hydrogen carbonate Sodium, 20-40g / L potassium persulfate, 50-100g / L sodium nitrate, 5-10g / L thiourea. [0005] The copper casting...

AI Technical Summary

Problems solved by technology

At present, the coloring agent for copper castings is not water-resistant and easy to fall off