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
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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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