Trivalent chromium electroplate liquid and preparing method thereof

Abstract

The invention discloses trivalent chromium electroplate liquid and a preparing method thereof. The trivalent chromium electroplate liquid comprises, by concentration, 0.2-0.35 mol / L of hexahydrate chromium trichloride, 0.25-0.35 mol / L of sodium gluconate, 2.0-4.5 mol / L of glycine, 0.1-0.15 mol / L of aluminum sulfate, 0.002-0.004 mol / L of dodecyl sodium gluconate, 0.4-0.8 mol / L of a complexing agent, 15-20 ml / L of stabilizer and the balance solvent water. The stabilizer is a water solution comprising 2-3 mol / L of methyl alcohol, 2-3 mol / L of sodium sulfite and 1-2 mol / L of ferrous sulfate. Compared with the prior art, the electroplate liquid is stable in performance and long in service life, and the quality of a coating is good. Meanwhile, the preparing method is simple, operation is easy, and very good application prospects and high using value are achieved.

Description

technical field

[0001] The invention relates to a trivalent chromium electroplating solution, and also relates to a preparation method of the trivalent chromium electroplating solution, belonging to the technical field of electrochemistry. Background technique

[0002] Chrome plating has good hardness, wear resistance, corrosion resistance and decorative properties, and is one of the most widely used plating types in the electroplating industry. At present, there are mainly two types of electroplating methods, one is the traditional hexavalent chromium plating technology, and the other is the trivalent chromium plating technology. Among them, the first type of chromium plating technology is currently widely used, but the chromium plating technology is highly toxic and pollutes heavily. , Wastewater treatment is difficult, seriously polluting my country's water, soil and atmospheric environment, which has attracted great attention from all countries in the world. The circulati...

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