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Corrosion resistant coating of silver combined coating

A corrosion-resistant, silver coating technology, applied in the field of corrosion-resistant coating, can solve the problems of reduced electrical conductivity, limited thickness, neglect of the bonding of base materials, etc., to achieve the effect of good adhesion and good wear resistance

Inactive Publication Date: 2019-11-01
东莞市合航精密科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the popularization of electronic products, the application of electronic products is becoming more and more extensive. During the use of electronic products, the electronic interface is often plugged and unplugged. Being oxidized and corroded, poor electrical contact often occurs. In order to improve wear resistance and corrosion resistance, many electronic interface terminals are electroplated with electroplating coatings. Electroplating coatings generally include a wear-resistant layer and an anti-oxidation corrosion layer. Due to the limited thickness of the coating, otherwise the excessive thickness will cause large internal stress and easy to fall off; therefore, the wear resistance and corrosion resistance of the terminal are not enough; if the thickness of the coating is too thick, its electrical conductivity will be reduced; in addition, Some electroplating coatings ignore the combination with the base material. After electroplating, the adhesion between the electroplating coating and the base material is poor, which will cause the electroplating layer to fall off during later use.

Method used

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  • Corrosion resistant coating of silver combined coating

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Effect test

Embodiment 1

[0026] This embodiment provides a coating with good wear resistance and corrosion resistance, including a nickel coating, a first silver coating 3 , a first gold coating 4 and a rhodium-ruthenium coating 5 electroplated on the surface of the substrate in sequence.

[0027] The coating structure of the above coating combination has good wear resistance, oxidation resistance, electrical conductivity and corrosion resistance, and the adhesion between the electroplating coating and the base material is good.

Embodiment 2

[0029] On the basis of embodiment 1, this embodiment provides a kind of the thinnest plating layer, and the thickness of described nickel plating layer is 0.5 micron, and the thickness of described first silver plating layer 3 is 0.5 micron, and the thickness of described first gold plating layer 4 has a thickness of 0.025 microns, and the rhodium-ruthenium coating 5 has a thickness of 0.25 microns.

Embodiment 3

[0031] On the basis of embodiment 1, this embodiment provides a corrosion-resistant coating with the best adhesion performance, and a pre-plating layer 2 is provided between the nickel coating layer and the first silver coating layer 3 . The bonding force between the nickel plating layer and the first silver plating layer 3 is increased by the pre-plating layer 2, and the first silver plating layer 3 and the rhodium-ruthenium plating layer 5 are also provided with the first gold plating layer to increase the bonding force between the two.

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Abstract

The invention relates to the technical field of electroplating, in particular to a corrosion resistant coating of a silver combined coating. The corrosion resistant coating comprises a base coating, afirst silver coating, a first gold coating and a rhodium ruthenium coating which are sequentially electroplated on the surface of a base material, the base coating is used for adjusting the surface flatness of the base material, the first silver coating is used for improving the conductivity of the base material, the first gold coating is used for improving the adhesion of the adjacent coating, and the rhodium ruthenium coating is used for improving the corrosion resistance and wear resistance of the base material. The coating structure prepared from the coating has good wear resistance, oxidation resistance, conductivity and corrosion resistance, and the adhesiveness between the electroplating coating and the base material is good.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a corrosion-resistant coating of a silver composite coating. Background technique [0002] With the popularization of electronic products, the application of electronic products is becoming more and more extensive. During the use of electronic products, the electronic interface is often plugged and unplugged. Being oxidized and corroded, poor electrical contact often occurs. In order to improve wear resistance and corrosion resistance, many electronic interface terminals are electroplated with electroplating coatings. Electroplating coatings generally include a wear-resistant layer and an anti-oxidation corrosion layer. Due to the limited thickness of the coating, otherwise the excessive thickness will cause large internal stress and easy to fall off; therefore, the wear resistance and corrosion resistance of the terminal are not enough; if the thickness of the coating is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/12
CPCC25D5/12
Inventor 周海湖
Owner 东莞市合航精密科技有限公司
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