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Pulse plating method of Ag-Ni alloy for electric contact material

An electrical contact material and pulse electroplating technology, which is applied in the field of preparation technology of electrical contact materials, can solve the problem of no electroplating Ag-Ni alloy, etc., and achieve the effects of good wear resistance and high hardness of the coating layer.

Inactive Publication Date: 2014-05-21
WUXI SANZHOU COLD ROLLED SILICON STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there is no report about electroplating Ag-Ni alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of pulse electroplating method of Ag-Ni alloy for electric contact material, comprises the following steps:

[0028] Sanding, water washing surfactant degreasing, water washing, activation, water washing, pulse plating, water washing, drying.

[0029] Among them, the substrate is made of pure copper;

[0030] Among them, the activation uses 250ml / L H 2 SO 4 solution, at room temperature for 1 to 2 minutes;

[0031] Among them, the composition of the electroplating solution is: 0.3mol / L NiSO 4 ·6H 2 O, 0.03mol / L AgCH 3 SO 3 , 1.5mol / L KI, 20g / L H 3 BO 3 , 10g / L H 2 NCONH 2 .

[0032] Wherein, the pulse electroplating parameters are: frequency 700Hz, duty cycle 20%, double pulse ratio 13:1, current density 0.4A / dm2, temperature 340°C.

Embodiment 2

[0034] A kind of pulse electroplating method of Ag-Ni alloy for electric contact material, comprises the following steps:

[0035] Sanding, water washing surfactant degreasing, water washing, activation, water washing, pulse plating, water washing, drying.

[0036] Among them, the substrate is made of pure copper;

[0037] Among them, the activation uses 250ml / L H 2 SO 4 solution, at room temperature for 1 to 2 minutes;

[0038] Among them, the composition of the electroplating solution is: 0.4mol / L NiSO 4 ·6H 2 O, 0.03mol / L AgCH 3 SO 3 , 1.5mol / L KI, 20g / L H 3 BO 3 , 10g / L H 2 NCONH 2 .

[0039]Wherein, the pulse plating parameters are: frequency 700 Hz, duty cycle 20%, double pulse ratio 14:1, current density 0.5 A / dm2, temperature 30°C.

Embodiment 3

[0041] A kind of pulse electroplating method of Ag-Ni alloy for electric contact material, comprises the following steps:

[0042] Sanding, water washing surfactant degreasing, water washing, activation, water washing, pulse plating, water washing, drying.

[0043] Among them, the substrate is made of pure copper;

[0044] Among them, the activation uses 250ml / L H 2 SO 4 solution, at room temperature for 1 to 2 minutes;

[0045] Among them, the composition of the electroplating solution is: 0.5mol / L NiSO 4 ·6H 2 O, 0.03mol / L AgCH 3 SO 3 , 1.5mol / L KI, 20g / L H 3 BO 3 , 10g / L H 2 NCONH 2 .

[0046] Wherein, the pulse plating parameters are: frequency 700 Hz, duty cycle 20%, double pulse ratio 12:1, current density 0.6 A / dm2, temperature 40°C.

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PUM

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Abstract

The invention relates to a pulse plating method of an Ag-Ni alloy for an electric contact material, and the pulse plating method comprises the following steps: sanding, washing a surfactant to remove oil, washing, activating, washing, performing pulse plating, washing and blow-drying, wherein a plating solution consists of 0.3-0.6mol / L NiSO4.6H2O, 0.03mol / L AgCH3SO3, 1.5mol / L KI, 20g / L H3BO3 and 10g / L H2NCONH2. The parameters of the pulse plating are as follows: the frequency is 700Hz, the duty cycle is 20%, the dual-pulse ratio is (12-14):1, the current density is (0.25-0.6)A / dm<2>, and the temperature is 30-40 DEG C. By adopting the method provided by the invention, the nickel content of the prepared Ag-Ni alloy is 20-30%, the plating hardness is high, the wear resistance is good, and the Ag-Ni alloy is an excellent electric contact material.

Description

technical field [0001] The present invention relates to a preparation process of an electrical contact material, in particular to a pulse electroplating method of an Ag-Ni alloy for an electrical contact material. Background technique [0002] The electrical contact material is the component that contacts, breaks and connects the current-carrying circuit through mechanical action in the switching device. The phenomenon of electrical contacts during the opening and closing process is extremely complex, and it is generally required to have high electrical conductivity, high thermal conductivity, good wear resistance, corrosion resistance, low and stable contact resistance and other characteristics. [0003] The early electrical contact materials mostly used pure silver, but due to the low melting point, low hardness and poor wear resistance of pure silver, the surface is easy to form a vulcanized film. In order to make up for the shortage of pure silver, a small amount of othe...

Claims

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Application Information

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IPC IPC(8): C25D5/18C25D3/64
Inventor 刘茂见
Owner WUXI SANZHOU COLD ROLLED SILICON STEEL
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