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Highly anti-corrosion chemical nickel-plating liquid and preparation method thereof

An electroless nickel plating solution and high corrosion resistance technology, which is applied in liquid chemical plating, metal material coating process, coating, etc., can solve the problems of poor anti-corrosion performance, unstable plating solution, and slow deposition speed, etc. Achieve the effects of fine and bright coating crystallization, improved protection performance, and low porosity

Inactive Publication Date: 2019-01-01
CHONGQING LIDAO SURFACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electroless plating started late in my country, and there are still many problems in industrial application, such as insufficient stability of plating solution, slow deposition rate, short service life, high cost, etc. At present, chemical nickel is directly used as a protective coating, and its anti-corrosion performance is still not good. , usually 10μm high phosphorus chemical nickel layer on carbon steel, the neutral salt spray test can only pass 24-36h
Various high-end products such as automobiles, motorcycles and aluminum alloy parts require higher corrosion resistance. Most of the requirements are met by multi-layer nickel plating, which has complex processes and high costs.

Method used

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  • Highly anti-corrosion chemical nickel-plating liquid and preparation method thereof
  • Highly anti-corrosion chemical nickel-plating liquid and preparation method thereof
  • Highly anti-corrosion chemical nickel-plating liquid and preparation method thereof

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Embodiment 1

[0030] The highly corrosion-resistant electroless nickel plating solution of this embodiment includes the following components: chemical nickel base solution, wetting agent, brightener, and stabilizer.

[0031] Wherein: the chemical nickel base liquid is nickel sulfate 25g / L, sodium hypophosphite 30g / L, citric acid 15g / L, lactic acid 10g / L, propionic acid 5g / L, sodium acetate 10g / L; the wetting agent It is polyethylene glycol (M=6000) 0.02g / L; the brightener is 2-mercaptobenzothiazole 5mg / L, polyalkyleneimine (M=5000) 1mg / L; the stabilizer is S- Carboxyethylisothiouronium salt 5mg / L; The preparation method of the high corrosion resistance chemical nickel plating solution of the present embodiment, comprises the steps:

[0032] (1) Use deionized water to prepare the base liquid, first mix and dissolve quantitative nickel sulfate with citric acid, lactic acid and propionic acid, and finally add quantitative sodium acetate and sodium hypophosphite, and fully stir;

[0033] (2) A...

Embodiment 2

[0052] The highly corrosion-resistant electroless nickel plating solution of this embodiment includes the following components: chemical nickel base solution, wetting agent, brightener, and stabilizer.

[0053] Wherein: the chemical nickel base liquid is nickel sulfate 25g / L, sodium hypophosphite 30g / L, citric acid 15g / L, lactic acid 10g / L, propionic acid 5g / L, sodium acetate 10g / L; the wetting agent It is polyethylene glycol (M=6000) 0.02g / L; the brightener is 2-mercaptobenzothiazole 5mg / L, polyalkyleneimine (M=5000) 1mg / L; the stabilizer is 3- Sulfur-isothiourea propane sulfonic acid compound 5mg / L; The preparation method of the high corrosion resistance electroless nickel plating solution of the present embodiment, comprises the steps:

[0054] (1) Use deionized water to prepare the base liquid, first mix and dissolve quantitative nickel sulfate with citric acid, lactic acid, and propionic acid, and finally add quantitative sodium acetate and sodium hypophosphite, and fully...

Embodiment 3

[0070] The highly corrosion-resistant electroless nickel plating solution of this embodiment includes the following components: chemical nickel base solution, wetting agent, brightener, and stabilizer.

[0071] Wherein: the chemical nickel base liquid is nickel sulfate 25g / L, sodium hypophosphite 30g / L, citric acid 15g / L, lactic acid 10g / L, propionic acid 5g / L, sodium acetate 10g / L; the wetting agent It is polyethylene glycol (M=6000) 0.02g / L; the brightener is 2-mercaptobenzothiazole 5mg / L, polyalkyleneimine (M=5000) 1mg / L; the stabilizer is 3- Amino-5-mercapto-1,2,4-triazole 5mg / L; The preparation method of the high corrosion resistance electroless nickel plating solution of the present embodiment comprises the steps:

[0072] (1) Use deionized water to prepare the base liquid, first mix and dissolve quantitative nickel sulfate with citric acid, lactic acid and propionic acid, and finally add quantitative sodium acetate and sodium hypophosphite, and fully stir;

[0073] (2)...

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Abstract

The invention relates to highly anti-corrosion chemical nickel-plating liquid. The chemical nickel-plating liquid is prepared from the following components: basic chemical nickel liquid, a wetting agent, a brightener and a stabilizer, wherein the basic chemical nickel liquid is prepared from the following components by weight: nickel sulfate, sodium hypophosphite, citric acid, lactic acid, propionic acid and sodium acetate; the wetting agent is polyethylene glycol, the brightener is 2-mercaptobenzothiazole and polyimide, and the stabilizer is one or a mixture of a 3-sulfur-isothiourea propanesulfonic acid compound, 3-amino-5-mercapto-1,2,4-triazole and S-carboxyethyl isothiuronium betaine. According to the highly anti-corrosion chemical nickel-plating liquid, working temperature is 85-95 DEG C, plating speed can reach about 10-12 mu m / h, plating is even, compact, bright and good in corrosion resistance, all ordinary steel plating thickness is 10 mu m or above, and resistance to neutralsalt spray is 48 h or above.

Description

technical field [0001] The invention belongs to the technical field of chemical electroplating, and relates to a highly corrosion-resistant chemical nickel plating solution and a preparation method thereof. Background technique [0002] Electroless nickel plating is a process in which nickel ions are reduced to metallic nickel by adding an appropriate reducing agent to the solution and deposited on the surface of the plated parts. Compared with electroplated nickel, electroless nickel has many advantages, mainly as follows: 1) The coating is uniform, and its composition is nickel or nickel and other elements, and the structure is compact and fine. Compared with the electroless nickel layer of the same thickness, the electroless nickel The micropores of the nickel layer are smaller than that of the electroplated nickel layer, so the corrosion resistance of the coating is far superior to that of the electroplated nickel layer; 2) Due to the dense structure of the electroless n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36
CPCC23C18/36
Inventor 胡国辉肖春艳包海生刘军李礼
Owner CHONGQING LIDAO SURFACE TECH
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