Tungsten disulfide/cobalt disulfide based composite coating and preparation method and application thereof

A tungsten disulfide and composite coating technology, applied in coatings, electrodes, electrolytic coatings, etc., to reduce friction coefficient and wear rate, excellent wear and corrosion resistance, and good economy.

Inactive Publication Date: 2019-01-04
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are few relevant patents and papers on cobalt-based composite coatings at home and abroad, especially tungsten disulfide / cobalt-based composite coatings integrating anti-wear, anti-friction and corrosion resistance.

Method used

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  • Tungsten disulfide/cobalt disulfide based composite coating and preparation method and application thereof
  • Tungsten disulfide/cobalt disulfide based composite coating and preparation method and application thereof
  • Tungsten disulfide/cobalt disulfide based composite coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Configure composite electroplating solution: dissolve cobalt sulfate, nickel sulfate, boric acid, sodium gluconate, n-octyltrimethylammonium bromide, and tungsten disulfide into deionized water to make a composite electroplating solution; among them, cobalt sulfate The concentration is 30g / L, the concentration of nickel sulfate is 30g / L, the concentration of boric acid is 20g / L, the concentration of sodium gluconate is 20g / L, and the concentration of n-octyltrimethylammonium bromide is 0.1g / L, The concentration of tungsten disulfide is 6g / L, and the pH value of the electroplating solution is adjusted to 2.5 with sodium hydroxide and dilute sulfuric acid.

[0034] 2. Take the anode as a cobalt sheet, and the cathode as a No. 45 steel substrate through degreasing-cleaning-acid activation, and the distance between the two electrodes is 3cm. The above-mentioned anode and cathode are immersed in the electroplating solution obtained in step S1, and the power is 50W. After ...

Embodiment 2

[0036] 1. Configure composite electroplating solution: dissolve cobalt sulfate, nickel sulfate, boric acid, sodium citrate, cetyltrimethylammonium bromide, and tungsten disulfide into deionized water to make a composite electroplating solution; among them, cobalt sulfate The concentration of nickel sulfate is 50g / L, the concentration of nickel sulfate is 50g / L, the concentration of boric acid is 40g / L, the concentration of sodium citrate is 40g / L, and the concentration of cetyltrimethylammonium bromide is 0.1g / L L, the concentration of tungsten disulfide is 8g / L, and the pH value of electroplating solution is adjusted to 3 with sodium hydroxide and dilute sulfuric acid.

[0037] 2. The anode is a nickel sheet, and the cathode is a brass substrate that has undergone degreasing-cleaning-acid activation. The distance between the two electrodes is 2cm. The above-mentioned anode and cathode are immersed in the electroplating solution obtained in step S1, and the power is 80W. Ultras...

Embodiment 3

[0040] 1. Configure a composite electroplating solution: dissolve cobalt sulfate, nickel chloride, boric acid, ammonium citrate, sodium lauryl sulfate, and tungsten disulfide into deionized water to make a composite electroplating solution; wherein the concentration of cobalt sulfate is 100g / L, the concentration of nickel chloride is 100g / L, the concentration of boric acid is 30g / L, the concentration of ammonium citrate is 30g / L, the concentration of sodium lauryl sulfate is 0.2g / L, the concentration of tungsten disulfide The concentration is 10g / L, and the pH value of the electroplating solution is adjusted to 4 with sodium hydroxide and dilute sulfuric acid.

[0041] 2. The anode is a nickel sheet, and the cathode is a No. 45 steel substrate that has undergone degreasing-cleaning-acid activation. The distance between the two electrodes is 4cm. The above-mentioned anode and cathode are immersed in the electroplating solution obtained in step S1. After ultrasonic vibration in ...

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Abstract

The invention belongs to the technical field of surface functional film materials, and discloses a tungsten disulfide / cobalt disulfide based composite coating and a preparation method and applicationthereof. Cobalt, nickel or cobalt-nickel alloy is used as an anode, a to-be-plated workpiece is used as a cathode, and after the anode and the cathode are soaked in a composite electroplating solutionand are ultrasonically vibrated, electrolytic deposition is carried out on the to-be-plated workpiece by pulse current to obtain the tungsten disulfide / cobalt disulfide based composite coating; and the composite electroplating solution comprises the following components under the condition that the total volume of deionized water and various substances is 1L: 30-100 g / L of cobalt salt, 30-100 g / Lof nickel salt, 10-50 g / L of boric acid, 10-50 g / L of a complexing agent, 0.05-0.3 g / L of a surfactant and 6-16 g / L of tungsten disulfide. The preparation method is simple, and the composite coatinghas high hardness, excellent wear resistance and friction reduction property and corrosion resistance. The composite coating is applied to a functional protection layer of a mechanical part which requires low friction coefficient, wear resistance and corrosion resistance, the overall performance of the mechanical part can be improved effectively, and the service life of the mechanical part is prolonged.

Description

technical field [0001] The invention belongs to the technical field of surface functional thin film materials, and more specifically relates to a tungsten disulfide / cobalt-based composite coating and its preparation method and application. Background technique [0002] It is well known that the wear, corrosion and fracture failure of mechanical parts can lead to huge economic losses. In the past, electroplating hard chrome (Cr) coating with good wear resistance and corrosion resistance on the surface of mechanical parts was an important measure to solve this problem. At present, with the continuous enhancement of human environmental protection awareness, the electroplating Cr process seriously pollutes the environment and endangers human health. Environmental protection departments around the world have restricted and prohibited this process. In addition, with the rapid development of modern industry, the requirements for the comprehensive performance of mechanical parts ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/18C25D15/00C25D17/10C25D21/10C25D21/12
CPCC25D3/562C25D5/18C25D15/00C25D17/10C25D21/10C25D21/12
Inventor 刘灿森揭晓华魏冬冬麦永津张留艳
Owner GUANGDONG UNIV OF TECH
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