Trivalent chromium electroplate liquid stabilizer and electroplate liquid thereof

TLDR: In this paper, a trivalent chromium electroplate liquid stabilizer and an electro plate liquid thereof are described, which is characterized in that the stabilizer is aqueous solvent formed by mixing 0.5 to 2mol/L methyl alcohol, 0.4 to 2.5 mol/L ammonium bromide and 0.2 to 0.6 ml/L chromium sulfate.

Abstract: The invention discloses a trivalent chromium electroplate liquid stabilizer and an electroplate liquid thereof, and is characterized in that the stabilizer is aqueous solvent formed by mixing 0.5 to 2mol/L methyl alcohol, 0.4 to 2.0 mol/L sodium sulfite and 0.5 to 2.5 mol/L ferrous sulfate; and the additive amount of the stabilizer is 1 to 30 ml per liter of the electroplate liquid. The inventionalso discloses a trivalent chromium electroplate liquid which fundamentally comprises the following components: 0.2 to 0.6 mol/L chromium sulfate, 0.5 to 1.5 mol/L potassium sulfate, 0.02 to 0.5 mol/L ammonium bromide, 0.5 to 1.2 mol/L boric acid, 0.2 to 0.5 mol/L sodium hypophosphite, 0.2 to 2.0 mol/L aminoacetic acid, 1 to 30 ml/L stabilizer and the balance of water which is used as solvent. The invention has the advantages that as the stabilizer is added into the trivalent chromium electroplate liquid, the stability and service life of the existing trivalent chromium electroplating technique are greatly improved; the plating has smooth and bright appearance, little cracks, good bonding force and lower cost; and the stabilizer can be widely applied in different trivalent chromium electroplating techniques.