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Chemical nickeling phosphorus alloy plating liquid and coating process thereof

A technology of electroless nickel-phosphorus plating and plating solution, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problems of slow plating solution plating speed, poor coating corrosion resistance and poor stability, etc. Achieve stable coating composition, good corrosion resistance and good stability

Inactive Publication Date: 2005-05-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problems of slow plating speed, short service life, poor stability, unstable coating composition, poor corrosion resistance of the coating, and metal chromium contained in the plating solution cannot be widely used in civilian products in the prior art, and provides A nickel-phosphorus alloy coating has good corrosion resistance electroless nickel-phosphorus alloy plating solution and its plating process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take by weighing nickel sulfate 20g, copper sulfate 0.004g as composite stabilizer composition, citric acid 11g, glycine 3.6g, aspartic acid 3.2g and lactic acid 6g as composite complexing agent composition, add water and dissolve and be made into 600mL solution, This is liquid A; weigh 25.5g of sodium hypophosphite, 8.5g of sodium acetate and 0.001g of sodium thiosulfate as a composite stabilizer component, dissolve in water to form a 300mL solution, and this is liquid B. Slowly add solution B to solution A to obtain solution C, adjust the pH value of solution C to 4.6 with sodium hydroxide solution, add water to 1000mL to obtain the desired plating solution.

[0015] Immerse the carbon steel substrate in a chemical degreasing solution for degreasing for 2 hours, wash with water, ultrasonically clean, wash with water, immerse in 13% hydrochloric acid solution to derust, wash with water, quickly immerse in the above plating solution, and plate at 85°C to obtain a plating...

Embodiment 2

[0017] Take by weighing nickel sulfate 10g, copper sulfate 0.005g as composite stabilizer composition, citric acid 13g, glycine 5.8g, aspartic acid 2g and lactic acid 7g as composite complexing agent composition, add water and dissolve and be made into 600mL solution, this It is liquid A; weigh 30g of sodium hypophosphite, 14g of sodium acetate and 0.001g of sodium thiosulfate as a composite stabilizer component, add water to dissolve and make 300mL solution, this is liquid B. Slowly add solution B to solution A to obtain solution C, adjust the pH value of solution C to 4.6 with sodium hydroxide solution, add water to 1000mL to obtain the required plating solution.

[0018] Immerse the carbon steel substrate in a chemical degreasing solution for degreasing for 2 hours, wash with water, ultrasonically clean, wash with water, immerse in 13% hydrochloric acid solution for rust removal, wash with water, quickly immerse in the above plating solution, and plate at 83°C to obtain a pl...

Embodiment 3

[0020] Take by weighing nickel sulfate 18g, copper sulfate 0.003g as composite stabilizer composition, citric acid 10g, glycine 5.8g, aspartic acid 1.2g and lactic acid 9g as composite complexing agent composition, add water and dissolve and be made into 600mL solution, This is liquid A; weigh 31g of sodium hypophosphite, 9g of sodium acetate and 0.001g of sodium thiosulfate as a composite stabilizer component, add water to dissolve and make a 300mL solution, this is liquid B. Slowly add liquid B to liquid A to obtain liquid C, adjust the pH value of liquid C to 4.5 with sodium hydroxide solution, add water to 1000mL to obtain the desired plating solution.

[0021] Immerse the carbon steel substrate in a chemical degreasing solution for degreasing for 2 hours, wash with water, ultrasonically clean, wash with water, immerse in 13% hydrochloric acid solution for rust removal, wash with water, quickly immerse in the above plating solution, and plate at 86°C to obtain a plating spe...

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PUM

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Abstract

The invention relates to a chemical Ni-P alloy-plating liquid and its process. The liquid is stable, works fast, has long service life, and does not contain chromium. So, it was widely used in industry. The Ni-P alloy coating is of fine corrosion-proof, containing 10-30g nickel sulfate, 20-40g sodium hypophosphite, 5-20g sodium acetate, 12-60g complexing agent and 0.002-0.01g complex stabilizer, with pH value of 4.5-5.0.

Description

technical field [0001] The invention relates to a plating solution and a plating process thereof, in particular to an electroless nickel-phosphorus alloy plating solution and a plating process thereof. Background technique [0002] In 1946, A.Brenner and G.Riddel successfully prepared the self-catalyzed nickel-phosphorus alloy coating for the first time [see "Electroless Nickel-based Alloy Theory and Technology" Harbin Institute of Technology Press, 2000], The research and application of electroless nickel-phosphorus alloy plating has been greatly developed. The amorphous nickel-phosphorus alloy coating has good corrosion resistance and wear resistance, and the thickness of the coating is very uniform without obvious edge effects. The bonding force between the coating and the substrate is better than that of electroplating. [See "Electroless Plating Theory and Practice" National Defense Industry Press, 2000] [0003] The core of electroless nickel-phosphorus alloy plating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36
Inventor 唐永明杨文忠王锦堂尹晓爽
Owner NANJING UNIV OF TECH
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