Trivalent chromium electroplating solution formula for automobile logo production and trivalent chromium electroplating process

Abstract

The invention provides a trivalent chromium electroplating solution formula for automobile logo production and a trivalent chromium electroplating process, and relates to the field of electroplating. The trivalent chromium electroplating solution formula for automobile logo production comprises the following raw material components: 8-12 g/L of potassium chromium sulfate, 6-8 g/L of chromium sulfate, 2-6 g/L of basic chromium sulfate, 3-6 g/L of sodium sulfate, 2-4 g/L of aluminum sulfate, 1-2 g/L of an acrylic acid-itaconic acid copolymer, 4-8 g/L of sodium fluoride, 0.2-2 g/L of sulfide, 0.5-1.5 g/L of sodium vinylsulfonate, 0.2-0.6 g/L of polyethylene glycol and the balance of water. According to the formula, potassium chromium sulfate, chromium sulfate and basic chromium sulfate are used as chromium sources, the acrylic acid-itaconic acid copolymer is used as a complexing agent to improve the stability of the plating solution; polyethylene glycol is used as a wetting agent, and sodium sulfate and aluminum sulfate are added, so that the covering capacity of the plating solution can be remarkably improved, the corrosion resistance of a chromium layer can be remarkably improved, and the chromium layer is high in hardness and high in corrosion resistance; and therefore, the chromium layer of the automobile logo has the advantages of being high in adhesive force, attractive in color, resistant to atrocious weather and the like.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to the formulation of a trivalent chromium electroplating solution for the production of automobile signs and a trivalent chromium electroplating process. Background technique [0002] Electroplating requires a low-voltage high-current power supply to the electroplating tank and an electrolytic device composed of electroplating solution, parts to be plated (cathode) and anode. The composition of the electroplating solution varies depending on the plating layer, but they all contain the main salt that provides metal ions. A complexing agent capable of complexing metal ions in the main salt to form a complex, a buffer for stabilizing the pH of the solution, an anode activator and special additives, the electroplating process is that the metal ions in the plating solution undergo The electrode reaction is reduced to metal atoms and the metal is deposited on the cathode. Therefore, this is...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides the formulation of the trivalent chromium electroplating solution and the trivalent chromi

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