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Non-cyanide electrosilvering process

A silver electroplating and process technology, which is applied in the field of cyanide-free silver electroplating process, can solve the problems of environmental pollution, low conductivity, weldability and contact resistance of metal silver plating, damage to the physical and mental health of operators, etc., to achieve reasonable process and reduce operators. damage effect

Inactive Publication Date: 2013-06-26
李振萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Metal silver plating has good conductivity, weldability and low contact resistance, and is widely used in high-end electronic components, electrical contacts, and expensive instruments and meters. The current electroplating silver plating process generally uses a cyanide-containing process, which causes pollution and damage to the environment Physical and mental health of operators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] A cyanide-free electroplating silver process, comprising the following steps, 1. metal parts are immersed in hydrochloric acid with a concentration of 35% to remove oil, 2. rinse with water after ultrasonic cleaning, 3. activation treatment, 4. washing with water, 5. electroplating deposition plating Silver, that is, put the metal parts into the current density 0.2-0.5A / dm 2 , PH value 4-5, temperature control in the solution of 30-40 ° C, immersion time is 4-8S, 6, washing, 7, drying, 8, packaging.

[0010] The solution is: silver nitrate 30-60g / L, sodium thiosulfate 150-300g / L, potassium metabisulfite 20-100g / L, citric acid 10-50g / L, polyoxyethylene fatty alcohol ether 5- 10g / L, the balance is a mixture of distilled water.

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PUM

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Abstract

The invention discloses a non-cyanide electrosilvering process comprising the following steps of: 1, chemically deoiling a metal part; 2, performing ultrasonic cleaning and washing on the metal part; 3, activating the washed metal part; 4, washing the activated part; 5, electroplating and deposition-silvering the metal part in a solution with the current density of 0.2-0.5 A / dm<2> and the pH of 4-5 at 30-40 DEG C for 4-8 S; 6, washing the part; 7, drying the part; and 8, packaging the product. The non-cyanide electrosilvering process disclosed by the invention is reasonable in technology, is environmentally-friendly and non-pollution as adopting a non-cyanide formula, and alleviates harms on an operator.

Description

technical field [0001] The invention belongs to the technical field of electroplating chemistry, and in particular relates to a cyanide-free electroplating silver process. Background technique [0002] Metal silver plating has good conductivity, weldability and low contact resistance, and is widely used in high-end electronic components, electrical contacts, and expensive instruments and meters. The current electroplating silver plating process generally uses a cyanide-containing process, which causes pollution and damage to the environment Operators are physically and mentally healthy. Contents of the invention [0003] The object of the present invention is to provide a cyanide-free electroplating silver plating process which is reasonable and convenient, environmentally friendly and pollution-free, and safe and harmless to operators. [0004] Technical solution of the present invention is: [0005] A cyanide-free electroplating silver process, characterized in that: c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/46
Inventor 李振萍
Owner 李振萍