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Organic amine system non-cyanide electroplating gold plating bath and method

An organic amine and gold electroplating technology, which is applied in the field of gold plating, can solve the problems of substandard coating performance and low stability of the plating solution, and achieve excellent welding performance, dense gold coating, and good bonding force

Active Publication Date: 2016-02-24
广东致卓环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main problem of cyanide-free electroplating at this stage is that the stability of the plating solution is not high and the performance of the coating is not up to standard in some aspects.

Method used

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  • Organic amine system non-cyanide electroplating gold plating bath and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Plating solution composition:

[0029]

[0030] Plating process conditions: brass nickel-plated plate as cathode, room temperature, pH8, current density 3A dm -2 , plating for 10min.

[0031] Effect: The coating is smooth and bright without obvious defects.

Embodiment 2

[0033] Plating solution composition:

[0034]

[0035] Plating process conditions: the circuit board nickel plating sample is used as the cathode, the temperature is controlled at 40 ° C, pH 6, the solution is convectively stirred, and the current density is 2A dm -2 , plating for 5 minutes.

[0036] Effect: The gold on the surface of the line is uniform without overflow, and the combination is firm.

Embodiment 3

[0038] Plating solution composition:

[0039]

[0040] Plating process conditions: iron-based metal decorative pendant as cathode, double anode control, temperature control 40 ℃, pH9, solution convection stirring, current density 4A dm -2 , plating for 5 minutes.

[0041] Effect: The gold on the surface of the pendant is uniform, bright without color difference, and without missing plating.

[0042] The formulation and process of the plating solution of the present invention are suitable for gold-plating treatment on the surface of copper, nickel, cobalt, palladium, silver, gold and other metals and their alloys. For non-metallic materials, a metal layer needs to be pre-plated and then gold-plated. The method of electroplating gold is as follows: after each component is dissolved and mixed, the pH of the plating solution is adjusted to 5-9, and the plating solution is heated at room temperature or below 50°C. The plated piece to be processed is the cathode, and the anode ...

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PUM

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Abstract

The invention discloses an organic amine system non-cyanide electroplating gold plating bath and method. The organic amine system non-cyanide electroplating gold plating bath is characterized in that the raw materials of the plating bath comprise: gold salt of 1-20 g / L, an organic amine coordinating agent of 20-200 g / L, conducting salt of 50-150 g / L, and additives of 0.01-10 g / L, wherein the organic amine type coordinating agent is compounded a from varied components of hydramine, acidamide and nitrogen containing heterocycles. According to the organic amine system non-cyanide electroplating gold plating bath disclosed by the invention, through the compound use of the organic amine type complexing agent, the stability of the plating bath can achieve the stability of a cyanide plating bath, and a gold plating film processed by the method is compact, good in binding force, and excellent in welding property.

Description

technical field [0001] The invention relates to the technical field of gold plating, and more specifically relates to an organic amine system cyanide-free electroplating gold plating solution and a method. Background technique [0002] Gold coating has good electrical conductivity, strong welding performance, low contact resistance, high temperature resistance and wear resistance, so it is widely used in hardware, electronics, instruments, aerospace and other industrial fields. Gold has high chemical stability, good corrosion resistance and tarnish resistance, so gold plating is also used as a decorative coating for electroplating jewelry, watch parts, artworks, etc. [0003] Traditional electroplating uses cyanide gold plating solution, but as we all know, CN - It is highly toxic and will cause great harm to electroplating workers and the environment. Therefore, in order to implement sustainable development, realize environmental protection and green production of electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/48
Inventor 谢金平李冰范小玲李宁宗高亮
Owner 广东致卓环保科技有限公司
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