Cyanide-free one-step rapid copper plating process for steel wire surface

A process, steel wire technology, applied in the field of cyanide-free one-step rapid copper plating process on the surface of steel wire, can solve the problems affecting the quality of steel wire copper plating, copper plating pitting, etc.

Inactive Publication Date: 2014-05-21
WUXI XINSANZHOU STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For steel wire pre-nickel plating, if it only takes less than one minute to apply the plating layer, it must be riddled with holes. The hole directly reaches the surface of the steel substrate, so the substitution reaction is very easy to occur, resulting in pitting of the copper coating, which affects the quality of the copper plating of the steel wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The formula of the electroplating solution is copper sulfate 150g / L, glycerol 5mL / L, sulfuric acid 15g / L, mixture of aminotrimethylene phosphonic acid and 2-mercaptobenzimidazole 50g / L, ammonium citrate 10g / L , the mass ratio of aminotrimethylene phosphonic acid and 2-mercaptobenzimidazole is 1:0.5; the cathode current density during electroplating is 35A / dm 2 , the temperature is 50°C.

Embodiment 2

[0047] The formula of the electroplating solution is copper sulfate 300g / L, glycerol 16mL / L, sulfuric acid 40g / L, mixture of aminotrimethylene phosphonic acid and 2-mercaptobenzimidazole 100g / L, ammonium citrate 40g / L , the mass ratio of aminotrimethylene phosphonic acid and 2-mercaptobenzimidazole is 1:2; the cathode current density during electroplating is 50A / dm 2 , the temperature is 60°C.

Embodiment 3

[0049] The electroplating solution formula is mainly composed of copper sulfate 200g / L, glycerol 10mL / L, sulfuric acid 20g / L, mixture of aminotrimethylene phosphonic acid and 2-mercaptobenzimidazole 60g / L, and ammonium citrate 20g / L. into, the mass ratio of aminotrimethylene phosphonic acid and 2-mercaptobenzimidazole is 1:1; the cathode current density during electroplating is 40A / dm 2 , the temperature is 50°C.

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Abstract

The invention relates to a cyanide-free one-step rapid copper plating process for a steel wire surface. The cyanide-free one-step rapid copper plating process is characterized in that the electroplating solution is obtained by mainly mixing 150-300 g/L of copper sulfate, 5-16 mL/L of glycerol, 15-40 g/L of sulfuric acid, 50-100 g/L of a mixture of amino trimethylene phosphonic acid and 2-mercaptobenzimidazole, and 10-40 g/L of ammonium citrate, the cathode current density during electroplating is 35-50 A/dm<2>, and the temperature is 50-60 DEG C. According to the present invention, pre-plating is not required, the copper layer can be formed at a high speed, and the uniform, bright and delicate plating layer with good binding force can be obtained.

Description

technical field [0001] The invention relates to the field of cyanide-free copper plating, in particular to a cyanide-free one-step rapid copper plating process on the surface of steel wires. Background technique [0002] Copper plating is one of the main processes for surface treatment of steel wire. Its usage in the metal products industry is second only to galvanizing, but its purpose and function are more extensive and important than galvanizing. In addition to its anti-corrosion and decorative functions like galvanizing, it is sometimes used to improve the electrical conductivity of the steel wire, sometimes to increase the lubricating performance of the steel wire when it is further drawn, sometimes to increase the bonding strength of the steel wire and rubber, and sometimes It is to facilitate the implementation of tin plating and silver plating on it. With the rapid development of science and technology and modern industry, steel wire copper plating technology has als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/38
Inventor 林永峰
Owner WUXI XINSANZHOU STEEL
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