Brightening agent for cyaniding silvering

Abstract

A brightneing agent for cyaniding plating of silver is prepared from potassium sodium tartrate and imidazole, dissolving said potassium sodium tartrate in water or distilled water, dissolving imidazole in water or distilled water, mixing, diluting with water or distilled water, and stirring. Its advantages are uniform lustre, not decolouring, high hardness and antiwear nature, and high binding force to basic body.

Description

technical field [0001] The invention relates to a brightener for cyanide silver plating. Background technique [0002] With the improvement of people's living standards and the rapid development of the electronic information industry, people's demand for bright silver plating is also increasing. Therefore, electroplating silver has a wide range of applications in the electronics industry and decorative industries. At present, the practical application system of electroplating silver can be divided into two categories: cyanide silver plating and cyanide-free silver plating. With the continuous improvement of people's awareness of environmental protection, cyanide-free silver plating should be the future development direction. However, compared with cyanide silver plating, the cyanide-free silver plating operation process is more complicated and the cost is higher, especially the stability of the plating solution and its brightener in the cyanide-free silver plating system ha...

AI Technical Summary

Problems solved by technology

Most of the currently commercialized cyanide silver plating brighteners contain sulfur, which is easy to decompose during the electrodeposition process, and the generated small molecular sulfides will be mixed in the coating, which is easy to change the color of the coating, and the working current density range is narrow.