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A brightener for alkaline chemical nickel-tungsten-phosphorus alloy plating and an electroless plating method using the brightener

A technology of electroless nickel-plating tungsten-phosphorus and brightener, applied in the direction of liquid chemical plating, metal material coating process, coating, etc. low brittleness, high binding force and low preparation cost

Active Publication Date: 2018-02-27
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the composite brightener can obtain a bright nickel plating layer on the surface of the part, its composition is complex, the preparation cost is high, and the adjustment between the components is difficult, resulting in low binding force of the brightener; and the above brightener is suitable for plating Nickel-phosphorus alloy, but not very suitable for the solution system and working conditions of nickel-plated tungsten-phosphorus alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment takes the electroless nickel-tungsten-phosphorus alloy plating of lead brass (HPb59-1) parts as an example to describe the method for electroless nickel-tungsten-phosphorus alloy plating.

[0022] In terms of 1L, the brightener for alkaline electroless nickel-plating tungsten-phosphorus alloy in this embodiment contains 100g saccharin, 1.5g propoxylated propynyl alcohol, 1.0g nonylphenol polyoxyethylene ether, and 1.0g sodium lauryl sulfate and the remainder of water.

[0023] Application has the electroless plating method of above-mentioned brightening agent in the present embodiment and comprises the following steps:

[0024] (1) Configure nickel-tungsten-phosphorus alloy basic solution: based on 1L, the basic solution contains 26g of nickel sulfate, 20g of sodium hypophosphite, 35g of sodium tungstate, 60g of sodium citrate, 20g of sodium gluconate, 30g of ammonium sulfate and four Sodium borate 6g;

[0025] (2) Add brightener: under stirring, add b...

Embodiment 2

[0029] In this embodiment, the method of electroless nickel-tungsten-phosphorus alloy plating on zinc alloy (ZnAl4-1) die-casting parts is taken as an example to describe the method.

[0030] In terms of 1L, the brightener for alkaline electroless nickel plating tungsten-phosphorus alloy in this embodiment contains 120g saccharin, 2.0g propoxylated propynyl alcohol, 1.5g nonylphenol polyoxyethylene ether, and 1.5g sodium lauryl sulfate and the remainder of water.

[0031] Application has the electroless plating method of above-mentioned brightening agent in the present embodiment and comprises the following steps:

[0032] (1) Configure nickel-tungsten-phosphorus alloy basic solution: based on 1L, the basic solution contains 26g of nickel sulfate, 20g of sodium hypophosphite, 35g of sodium tungstate, 60g of sodium citrate, 20g of sodium gluconate, 30g of ammonium sulfate and four Sodium borate 6g;

[0033] (2) Add brightener: add described brightener to the nickel-tungsten-p...

Embodiment 3

[0037] In this embodiment, the method of electroless nickel-tungsten-phosphorus alloy plating on a quenched and tempered steel (40Cr) part is taken as an example.

[0038] In terms of 1L, the brightener for alkaline electroless nickel plating tungsten-phosphorus alloy in this embodiment contains 90g saccharin, 1.0g propoxylated propynyl alcohol, 0.8g nonylphenol polyoxyethylene ether, 0.6g sodium lauryl sulfate and the remainder of water.

[0039] Application has the electroless plating method of above-mentioned brightening agent in the present embodiment and comprises the following steps:

[0040] (1) Configure nickel-tungsten-phosphorus alloy basic solution: based on 1L, the basic solution contains 26g of nickel sulfate, 20g of sodium hypophosphite, 35g of sodium tungstate, 60g of sodium citrate, 20g of sodium gluconate, 30g of ammonium sulfate and four Sodium borate 6g;

[0041] (2) Add brightener: add described brightener to the nickel-tungsten-phosphorus alloy base solu...

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Abstract

The invention relates to an alkaline electroless nickel-plating tungsten-phosphorus alloy brightener. The brightener contains 90-120g of saccharin, 1.0-2.0g of propoxylated propynyl alcohol, and 0.8-1.5g of nonylphenol poly Oxyethylene ether, 0.6-1.5g sodium lauryl sulfate and the rest of water. The present invention also relates to a preparation method using the above-mentioned brightener. The brightener comprising nickel sulfate, sodium hypophosphite, sodium tungstate, sodium citrate, sodium gluconate, ammonium sulfate and sodium tetraborate has simple components, low preparation cost, and is easy to control, so that the brightener has relatively high Good binding force, and well combined with the solution system of nickel-plated tungsten-phosphorus alloy, adapt to the working conditions of electroless plating of nickel-plated tungsten-phosphorus alloy; After the brightener is added to the alloy base solution, the formed nickel-tungsten-phosphorus alloy coating has uniformity, good brightness, low brittleness and high binding force, thereby effectively prolonging the service life of the nickel-tungsten-phosphorus alloy coating.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, specifically an alkaline electroless nickel-tungsten-phosphorus alloy brightener, and also relates to an electroless plating method using the above-mentioned brightener. Background technique [0002] Electroless nickel-phosphorus alloy plating is to use oxidation-reduction reaction to deposit a layer of alloy coating on the catalytic specific surface. The electroless nickel-phosphorus alloy coating has good corrosion resistance and wear resistance, uniform thickness, high hardness and good profiling. It has a wide range of applications in chemical machinery and even aerospace fields. Compared with electroless nickel-phosphorus alloy plating, electroless nickel-tungsten-phosphorus alloy plating has gained more and more attention and applications because it can further improve the wear resistance, corrosion resistance and thermal stability of the coating. [0003] In some demanding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/50
Inventor 陈耘刘子瑜李亮赵洁刘晓彬陈敏唐家耘朱宇瑾王超伦李德光谢宝奎
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH