Gold-plating process of high-voltage contact head and contact finger

A high-voltage contact and process technology, applied in the field of gold plating process, can solve problems such as affecting service life, high local temperature, affecting safety, etc., and achieve the effect of prolonging service life, safe use and beautiful appearance

Inactive Publication Date: 2010-04-21
JIANGSU RUGAO HIGH VOLTAGE ELECTRIC APP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the silver-plated high-voltage contacts and fingers are: silver plating: active in nature, poor resistance to sulfur and halog

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] For the contact finger, use sodium hydroxide 7g / L, Na 2 CO 3 40g / L, trisodium phosphate 53g / L for degreasing, soak for 45 minutes at 87°C to remove surface oil stains. Soak in clean water for 2 more times, the first time is to soak in hot water at 87°C for 1 minute, and the second time is to soak in room temperature water for 1 minute. Then soak in diluted hydrochloric acid at room temperature for 1 minute, the ratio of hydrochloric acid to water is 1:1, remove the scale on the surface of the contacts and fingers, and then soak at room temperature for 1 minute. Soak for 3-5 seconds in the mixed acid configured by 98% concentrated nitric acid and 98% concentrated sulfuric acid in a volume ratio of 1:3. Soak the lighted contacts and fingers in water for 3-5 seconds, take them out, then soak them in a mixture of 94g / L chromic anhydride and 6g / L sulfuric acid for 3-5 seconds, take them out and soak them in room temperature water for 1 minute , then soak in hot water at ...

Embodiment 2

[0038] For the contact finger, use sodium hydroxide 10g / L, Na 2 CO 350g / L, trisodium phosphate 70g / L for degreasing, soak for 45 minutes at 90°C to remove surface oil stains. Soak in clean water for 2 more times, the first time is to soak in hot water at 87°C for 1 minute, and the second time is to soak in room temperature water for 1 minute. Then soak in diluted hydrochloric acid at room temperature for 1 minute, the ratio of hydrochloric acid to water is 1:1, remove the scale on the surface of the contacts and fingers, and then soak at room temperature for 1 minute. Soak for 3-5 seconds in the mixed acid configured by 98% concentrated nitric acid and 98% concentrated sulfuric acid in a volume ratio of 1:3. Soak the lighted contacts and fingers in water for 3-5 seconds, take them out, then soak them in a mixture of 100g / L chromic anhydride and 8g / L sulfuric acid for 3-5 seconds, take them out and soak them in room temperature water for 1 minute , then soak in hot water at ...

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PUM

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Abstract

The invention provides a gold-plating process of a high-voltage contact head and a high-voltage contact finger, which changes the traditional coppering process and carries out surface gold-plating treatment by adopting the steps of coppering, then nickeling and finally gold-plating. In the treatment process, the product is suitable for using outdoors for a long time and can not be vulcanized or halogenated by utilizing the inertness of gold, thereby effectively protecting the product and prolonging the service life; and in addition, during the use, as the product is not easy to vulcanize, the invention is attractive in appearance, favorable in contact and safe in use.

Description

technical field [0001] The invention relates to a gold-plating process for high-voltage contacts and contact fingers, in particular to a process of pre-plating two metals and then gold-plating, which effectively prevents product vulcanization. Background technique [0002] At present, the surfaces of high-voltage contacts and fingers on the market are all silver-plated. The disadvantages of the silver-plated high-voltage contacts and fingers are: silver-plated: lively in nature, poor in sulfur and halogen resistance. It is easy to vulcanize and turn black in the air, affecting appearance, conductivity and service life; high local temperature affects safety. Contents of the invention [0003] The main task of the present invention is to provide a gold-plating process for high-voltage contacts and fingers, in particular to a gold-plating process for high-voltage contacts and fingers that can effectively prevent product vulcanization and prolong the service life of the produ...

Claims

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Application Information

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IPC IPC(8): C25D5/12C25D3/38C25D3/12C25D3/48
Inventor 朱晓龙易少俊
Owner JIANGSU RUGAO HIGH VOLTAGE ELECTRIC APP
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