Chloride decorative trivalent chromium plating solution

Abstract

The invention discloses a chloride trivalent chromium plating solution, in particular to a decorative trivalent chromium plating solution, and provides a chloride decorative trivalent chromium plating solution and a preparation method thereof. The chloride decorative trivalent chromium plating solution mainly comprises a main salt, a complexing agent, a buffering agent, a conducting salt, a stabilizer, a depolarizer and a brightener. The method comprises the following steps of: weighing the needed main salt, the complexing agent, the buffering agent, the conducting salt, the stabilizer, the depolarizer and the brightener according to the composition proportion of the plating solution and the volume of the needed plating solution, and adding an appropriate amount of deionized water respectively for dissolving; and adding the main salt into the complexing agent solution, mixing with a conducting saline solution, adjusting the pH value to 1.5-4.0, adding the stabilizer, the buffering agent, the deionizing agent and the brightening agent, adjusting to needed water amount, aging at the temperature of 20-50 DEG C for two hours, and standing for 24 hours.

Description

technical field [0001] The invention belongs to the technical field of electroplating, and relates to a chloride decorative trivalent chromium electroplating solution. Background technique [0002] Chromium plating occupies an extremely important position in the electroplating industry. Decorative plating is one of the main functions of chrome plating. Hexavalent chromium plating is white and bright, has excellent hardness, wear resistance, corrosion resistance and good decoration, and is widely used in automobiles. However, hexavalent chromium has serious harm to the environment and human health, and hexavalent chromium electroplating is one of the most serious and difficult sources of electroplating industrial pollution. It is a wise method to control the pollution of hexavalent chromium from the source. Since the 1970s, with the strengthening of people's awareness of environmental protection and the development of science and technology, people have been trying to find...

AI Technical Summary

Problems solved by technology

The disadvantage is that when the current density is high, chlorine will be precipitated at the anode, which will cause serious pollution and serious corrosion to the equipment.

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