A kind of silver/graphene composite plating solution and its using method and silver/graphene composite coating

A technology of graphene composite and graphene sheet, applied in the direction of coating, electrolytic coating, etc., to achieve the effect of improving anti-sulfurization performance

Active Publication Date: 2022-03-11
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, research on the sulfur resistance of silver-based electrical contact materials at home and abroad has not been interrupted.

Method used

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  • A kind of silver/graphene composite plating solution and its using method and silver/graphene composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Step 1: Configure pre-silvering solution and composite plating solution

[0051]Pre-plating silver solution: KI 120g / L, AgNO 3 4g / L, Na 2 S 2 o 3 50g / L, HNO 3 4g / L and deionized water, pH 5;

[0052] Composite plating solution: AgNO 3 15g / L, KI 160g / L, Na 2 S 2 o 3 70g / L, HNO 3 4g / L, dispersant 3g / L, auxiliary agent 3g / L, defoamer 0.5g / L, graphene sheet 2g / L and deionized water, pH is 5; among them, the number of graphene sheet layers is 3 layers, medium The maximum particle size is 3 μm; the dispersant is sodium dodecylbenzenesulfonate, the auxiliary agent is isooctyl acetate and N-acetyl-L-proline with a mass ratio of 1:2, and the defoamer is polyoxyethylene Polyoxypropylene amine ether.

[0053] Step 2: Surface pretreatment of the substrate

[0054] Grinding: use 400 # Grind the substrate evenly with water sandpaper;

[0055] Degreasing: Soak the polished substrate in degreasing solution for 10 minutes, degreasing solution: 30g / L NaOH, 50g / L NaOH ...

Embodiment 2

[0065] Step 1: Configure pre-silvering solution and composite plating solution

[0066] Pre-plating silver solution: KI 240g / L, AgNO 3 6g / L, Na 2 S 2 o 3 60g / L, HNO 3 3g / L and deionized water, pH 3;

[0067] Composite plating solution: AgNO 3 18g / L, KI 360g / L, Na 2 S 2 o 3 50g / L, HNO 3 8g / L, dispersant 2.5g / L, auxiliary agent 4g / L, defoamer 0.02g / L, graphene sheet 1.5g / L and deionized water, pH is 5; among them, the number of graphene sheet is 2 layers , the median particle size is 6 μm; the dispersant is sodium dodecylbenzenesulfonate, the auxiliary agent is isooctyl acetate and N-acetyl-L-proline in a mass ratio of 3:5, and the defoamer is polyoxyethylene Polyoxypropylene amine ether;

[0068] Step 2: Surface pretreatment of the substrate

[0069] Grinding: use 400 # Grind the substrate evenly with water sandpaper;

[0070] Degreasing: Soak the polished substrate in degreasing solution for 6 minutes, degreasing solution: 150g / L NaOH, 40g / L NaOH 2 CO 3 ,...

Embodiment 3

[0080] Step 1: Configure pre-silvering solution and composite plating solution;

[0081] Pre-plating silver solution: KI 120g / L, AgNO 3 4g / L, Na 2 S 2 o 3 50g / L, HNO 3 4g / L and deionized water, pH 5;

[0082] Composite plating solution: AgNO 3 50g / L, KI 200g / L, Na 2 S 2 o 3 60g / L, HNO 3 10g / L, dispersant 3g / L, auxiliary agent 1g / L, defoamer 0.5g / L, graphene sheet 1g / L and deionized water, pH is 7; among them, the number of graphene sheets is 2 layers, medium The maximum particle size is 2μm; the dispersant is sodium dodecylbenzenesulfonate, the auxiliary agent is isooctyl acetate, and the defoamer is polyoxyethylene polyoxypropyleneamine ether;

[0083] Step 2: Surface pretreatment of the substrate

[0084] Grinding: use 400 # Grind the substrate evenly with water sandpaper;

[0085] Degreasing: Soak the polished substrate in degreasing solution for 10 minutes, degreasing solution: 100g / L NaOH, 50g / L NaOH 2 CO 3 , 30g / L Na 3 PO 4 .

[0086] Cleaning: wa...

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Abstract

The invention provides a silver / graphene composite plating solution, comprising AgNO 3 3~80g / L, KI 30~400g / L, Na 2 S 2 o 3 6~300g / L, HNO 3 1-20g / L, dispersant 0.1-10g / L, auxiliary agent 0.1-10g / L, defoamer 0.01-3g / L, graphene sheet 0.5-5g / L and water. The silver / graphene composite plating solution provided by the invention can control the complex compound on the graphene surface by adding dispersant, auxiliary agent and defoamer, so that the graphene sheets are uniformly parallel to the substrate surface, preventing the vulcanization of the silver layer, Realize the isolation of silver and harmful gases, and improve the anti-sulfurization performance of the composite coating. The experimental results show that the silver / graphene composite coating provided by the present invention has a large amount of Na in volume fraction 5%. 2 Soaked in S solution for 240 hours without discoloration, the sulfur resistance far exceeds the requirements of the navigation mark QJ485-1988.

Description

technical field [0001] The invention belongs to the field of composite electroplating, and in particular relates to a silver / graphene composite plating solution, a method for using the same, and a silver / graphene composite coating. Background technique [0002] The southeast coastal area of ​​my country belongs to the high-temperature, high-humidity and high-salt atmospheric environment, coupled with the development of industry, the atmospheric environment of the substation in this area is harsh, and the corrosion and failure of conductor materials are very serious. There are serious corrosion and failure problems in the silver-plated layer of electrical contacts for high-voltage disconnectors. Corrosion has seriously threatened the service safety of high-voltage isolating switches, circuit breakers and other equipment. The main reason is that the silver-plated layer of electrical contacts is vulcanized in a high-temperature, high-humidity, and high-salt atmosphere, which ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D3/46C25D5/10
CPCC25D15/00C25D3/46C25D5/10
Inventor 裴锋周宇田旭刘欣叶志国于金山贾蕗路周友武
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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