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Cyanide-free gold plating solution for loudspeaker basin stand

A speaker basin frame, cyanide-free gold plating technology, applied in the field of speakers, can solve problems such as poor plating effect and instability

Pending Publication Date: 2022-04-15
GANZHOU KINGYUNG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electroless gold plating is a branch of electroless plating technology, which has developed very rapidly. Compared with cyanide-based gold plating solutions, the existing cyanide-free gold plating solutions have the defects of instability and poor plating effect, which limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of cyanide-free gold-plating solution for loudspeaker frame that the present invention proposes, its raw material comprises by concentration: tetrachloroalloy acid 24g / L, composite complexing agent 28g / L, potassium tartrate 32g / L, methallyl sulfonic acid Sodium 21mg / L, n-octyl sodium 4mg / L, sorbic acid 44mg / L, antimony potassium tartrate 4.5mg / L, polyacrylamide 0.5g / L, corrosion inhibitor 30mg / L, polyethylene glycol 1.1g / L L, ethylenediamine 8g / L, composite reducing agent 4g / L;

[0021] The compound complexing agent is a mixture of 2-amino-5-mercapto-1,3,4-thiazole, sodium ethylenediamine tetramethylene phosphonate, triammonium citrate, and 2-amino-5-mercapto- The weight ratio of 1,3,4-thiazole, sodium ethylenediamine tetramethylene phosphonate and triammonium citrate is 5:4:1;

[0022] The composite reducing agent is a mixture of sodium hypophosphite, hydroxylamine sulfate, sodium gluconate, and ascorbic acid, and the weight ratio of sodium hypophosphite, hydro...

Embodiment 2

[0026] A kind of cyanide-free gold-plating liquid for loudspeaker frame that the present invention proposes, its raw material comprises by concentration: tetrachloroalloy acid 16g / L, composite complexing agent 43g / L, potassium tartrate 24g / L, methallyl sulfonic acid Sodium 32mg / L, n-octyl sodium 5.8mg / L, reaction accelerator 53mg / L, potassium carbonate 2.7mg / L, polyacrylamide 1.1g / L, corrosion inhibitor 25mg / L, polyethylene glycol 1.4g / L, ethylenediamine 9.5g / L, composite reducing agent 8g / L;

[0027] The compound complexing agent is a mixture of 2-amino-5-mercapto-1,3,4-thiazole, sodium ethylenediamine tetramethylene phosphonate, triammonium citrate, and 2-amino-5-mercapto- The weight ratio of 1,3,4-thiazole, sodium ethylenediamine tetramethylene phosphonate and triammonium citrate is 12:1:9;

[0028] The composite reducing agent is a mixture of sodium hypophosphite, hydroxylamine sulfate, sodium gluconate, and ascorbic acid, and the weight ratio of sodium hypophosphite, hy...

Embodiment 3

[0033] A kind of cyanide-free gold-plating solution for loudspeaker frame proposed by the present invention, its raw material comprises by concentration: tetrachloroalloy acid 20g / L, 2-amino-5-mercapto-1,3,4-thiazole 16g / L, ethylene glycol Sodium amine tetramethylene phosphonate 2g / L, triammonium citrate 14g / L, potassium tartrate 30g / L, sodium methallyl sulfonate 26mg / L, sodium n-octyl sulfate 5mg / L, succinic acid 45mg / L, antimony potassium tartrate 4mg / L, polyacrylamide 0.6g / L, cerium nitrate 20mg / L, benzotriazole 2mg / L, 2-mercaptobenzothiazole 4mg / L, sodium tungstate 2mg / L , polyethylene glycol 1.6g / L, ethylenediamine 3g / L, sodium hypophosphite 1g / L, hydroxylamine sulfate 2.2g / L, sodium gluconate 0.8g / L, ascorbic acid 1g / L.

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PUM

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Abstract

The invention discloses a cyanide-free gold plating solution for a loudspeaker basin stand. The cyanide-free gold plating solution comprises the following raw materials: tetrachloro-alloyed acid, a composite complexing agent, potassium tartrate, sodium methylallyl sulfonate, sodium n-octyl sulfate, a reaction accelerator, a stabilizer, polyacrylamide, a corrosion inhibitor, polyethylene glycol, ethylenediamine and a composite reducing agent, the composite complexing agent is a mixture of 2-amino-5-sulfydryl-1, 3, 4-thiazole, sodium ethylenediamine tetramethylenephosphonate and triammonium citrate; the composite reducing agent is a mixture of sodium hypophosphite, hydroxylamine sulfate, sodium gluconate and ascorbic acid. The cyanide-free gold plating solution for the loudspeaker basin stand is good in stability and high in plating speed, and an obtained plating layer is uniform in thickness, good in brightness and excellent in corrosion resistance, wear resistance and discoloration resistance.

Description

technical field [0001] The invention relates to the technical field of loudspeakers, in particular to a cyanide-free gold plating solution for a loudspeaker frame. Background technique [0002] Gold has good physical properties and stable chemical properties. The gold-plated layer has a golden appearance, strong resistance to discoloration, and has excellent properties such as corrosion resistance and wear resistance. It can be used as a decorative layer and a functional layer at the same time, and is widely used in electronics. , instrumentation, packaging, aerospace and many other industrial fields. Electroless gold plating is a branch of electroless plating technology, which develops very rapidly. Compared with cyanide-based gold plating solutions, the existing cyanide-free gold plating solutions have the defects of instability and poor plating effect, which limits its application. Contents of the invention [0003] Based on the technical problems existing in the backg...

Claims

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Application Information

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IPC IPC(8): C23C18/44
Inventor 罗云锋
Owner GANZHOU KINGYUNG TECH CO LTD
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