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Stable chemical nickel-plating plating solution and preparation method thereof

A technology of electroless nickel plating and plating solution, which is applied in liquid chemical plating, metal material coating process, coating, etc. The effect of preventing the service life from being too low and high stability

Inactive Publication Date: 2009-11-25
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current nickel-containing main salt and stabilizer in the plating solution, the Chinese patent CN1152629A main salt is nickel chloride, the temperature in actual industrial production is generally above 90 ° C, nickel chloride will cause a large amount of poisonous gas, which is harmful to the human body Larger; due to containing a large amount of impurity in the bath in industrial production, if the stabilizer effect of choosing is not good, these impurities will poison bath, cause the service life of bath to reduce, the stabilizer that Chinese patent CN1424430A uses is iodine Potassium acid, its tolerance to the plating solution is relatively small

Method used

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  • Stable chemical nickel-plating plating solution and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] 1. Take a 1L beaker and put in 500ml of water; weigh 6g of sodium carbonate into the beaker and stir to dissolve completely;

[0026] 2. Pour 5 grams of succinic acid dissolved in water into the beaker and stir evenly;

[0027] 3. Pour 16ml of lactic acid solution into a beaker and stir evenly, then use sodium carbonate to adjust the Ph=4 of the plating solution;

[0028] 4. Weigh 5 grams of citric acid to dissolve it, pour it into a beaker and stir evenly;

[0029] 5. Pour 2ml of propionic acid into a beaker and stir evenly;

[0030] 6. Pour 5g of malic acid dissolved in water into the beaker and stir evenly;

[0031] 7. Weigh 30g of sodium hypophosphite and pour it directly into a beaker to dissolve it completely and stir evenly.

[0032] 8. Weigh 30g of nickel sulfate and pour it directly into the beaker to make it completely dissolve and stir evenly;

[0033] 9. Weigh 4 mg of thiosemicarbazide that has been completely dissolved in water and pour it into a beaker...

Embodiment 2

[0038] 1. Take a 1L beaker and put in 500ml of water, weigh 5g of sodium carbonate into the beaker and stir to dissolve completely;

[0039] 2. Pour 3 grams of succinic acid dissolved in water into the beaker and stir evenly;

[0040] 3. Pour 10ml of lactic acid solution into a beaker and stir evenly, then use sodium carbonate to adjust the Ph=4 of the plating solution;

[0041] 4. Weigh 15 grams of citric acid to dissolve it, pour it into a beaker and stir evenly;

[0042] 5. Pour 4ml of propionic acid into a beaker and stir evenly;

[0043] 6. Pour 12g of malic acid dissolved in water into the beaker and stir evenly;

[0044] 7. Weigh 35g of sodium hypophosphite and pour it directly into a beaker to dissolve it completely and stir evenly.

[0045] 8. Weigh 32g of nickel sulfate and pour it directly into the beaker to make it completely dissolve and stir evenly;

[0046] 9. Weigh 4 mg of thiosemicarbazide that has been completely dissolved in water and pour it into a beak...

Embodiment 3

[0051] 1. Take a 1L beaker and put in 500ml of water, weigh 4g of sodium carbonate into the beaker and stir to dissolve completely;

[0052] 2. Pour 8 grams of succinic acid dissolved in water into the beaker and stir evenly;

[0053] 3. Pour 20ml of lactic acid solution into a beaker and stir evenly, then use sodium carbonate to adjust the Ph=4 of the plating solution;

[0054] 4. Weigh 15 grams of citric acid to dissolve it, pour it into a beaker and stir evenly;

[0055] 5. Pour 6ml of propionic acid into a beaker and stir evenly;

[0056] 6. Pour 19g of malic acid dissolved in water into the beaker and stir evenly;

[0057] 7. Weigh 35g of sodium hypophosphite and pour it directly into a beaker to dissolve it completely and stir evenly.

[0058] 8. Weigh 35g of nickel sulfate and pour it directly into the beaker to make it completely dissolve and stir evenly;

[0059] 9. Weigh 6 mg of thiosemicarbazide that has been completely dissolved in water, pour it into a beaker ...

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Abstract

The invention discloses a stable chemical nickel-plating plating solution and a preparation method thereof. The plating solution comprises following substances per liter: 3-10g of succinic acid, 20-25g of sodium acetate, 8-20ml of lactic acid, 4-16g of citric acid, 1-7ml of propanoic acid, 8-20g of malic acid, 30-35g of sodium hypophosphite, 30-35g of nickel sulfate and 1-9mg of aminothiourea. The preparation method comprises steps of dissolving succinic acid and sodium acetate in water, adding lactic acid, using sodium carbonate to adjust pH=3-4 of solution, then adding citric acid, propanoic acid, malic acid, sodium hypophosphite, nickel sulfate and aminothiourea, at last using sodium carbonate to adjust pH=3.8-4.1 of solution. Compared with the prior art, the plating solution has high stability with no chlorine when using, and high tolerance.

Description

technical field [0001] The invention relates to a nickel plating bath and a preparation method thereof, in particular to an electroless nickel plating bath and a preparation method thereof. Background technique [0002] Electroless nickel plating is based on the mechanism of self-catalytic reaction, and metal deposition reaction occurs under certain process conditions. It has uniform coating, high hardness, good wear resistance, good corrosion resistance, and convenient operation. All industrial sectors are increasingly used. [0003] The current nickel-containing main salt and stabilizer in the plating solution, the Chinese patent CN1152629A main salt is nickel chloride, the temperature in actual industrial production is generally above 90 ° C, nickel chloride will cause a large amount of poisonous gas, which is harmful to the human body Larger; due to containing a large amount of impurity in the bath in industrial production, if the stabilizer effect of choosing is not go...

Claims

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Application Information

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IPC IPC(8): C23C18/36
Inventor 宋仁军程功豆忠颖刘昌权卢礼华
Owner CHERY AUTOMOBILE CO LTD
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