Brightening agent for cyaniding silvering
A brightener, silver light technology, applied in the field of cyanide silver plating brightener, can solve the problems of narrow working current density range, inclusions, easy decomposition and so on
Inactive Publication Date: 2004-08-18
WUHAN UNIV
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- Summary
- Abstract
- Description
- Claims
- Application Information
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.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0007] Embodiment 1: The composition of the brightener is potassium sodium tartrate 100 g / liter aqueous solution, imidazole 20 g / liter aqueous solution.
Embodiment 2
[0008] Embodiment 2: The composition of the brightener is potassium sodium tartrate 200 g / liter aqueous solution, imidazole 10 g / liter aqueous solution.
Embodiment 3
[0009] Embodiment 3: The composition of the brightener is potassium sodium tartrate 250 grams / liter aqueous solution, imidazole 15 grams / liter aqueous solution.
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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...
Claims
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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/46
Inventor 左正忠刘仁志李卫东胡进杨江成王志军
Owner WUHAN UNIV
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