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Ni-W-WS2 nano composite coating and preparation method thereof

A nano-composite and composite electroplating technology, applied in coatings, electrolytic coatings, etc., can solve problems such as low hardness, low cathode efficiency, and low corrosion resistance, and achieve the effects of increasing hardness, improving hardness, and enhancing adaptability

Active Publication Date: 2022-01-18
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the electrodeposition process, the Ni-W coating also has some defects, such as the low efficiency of the cathode, which is inevitably accompanied by the side reaction of hydrogen evolution, which will induce the generation of internal stress in the coating, resulting in cracks and pinholes.
In addition, in the actual application environment, Ni-W coating also has certain limitations, such as low corrosion resistance, weak hydrophobicity, low hardness, etc.

Method used

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  • Ni-W-WS2 nano composite coating and preparation method thereof
  • Ni-W-WS2 nano composite coating and preparation method thereof
  • Ni-W-WS2 nano composite coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A kind of Ni-W / WS 2 The nanocomposite coating is prepared through the following steps:

[0072] (1) Pretreatment of the substrate: the steel sheet is polished and derusted with sandpaper, then degreased by ultrasonic cleaning, and finally activated by pickling. The cleaning agent for degreasing the substrate is an aqueous solution, and the concentration of each component in the aqueous solution is: sodium hydroxide 50g / L, sodium carbonate 40g / L, sodium phosphate 40g / L, OP-10 emulsifier 3ml / L, temperature 70°C , Time 10min. Use glacial acetic acid with a concentration of 0.2-1mol / L to pickle and activate at room temperature for 30s.

[0073] (2) Preparation of electroplating solution: Ni-W-WS 2 The components of the composite electroplating solution are: nickel sulfate 15.8g / L, sodium tungstate 46.2g / L, sodium bromide 15.5g / L, trisodium citrate 147g / L, ammonium chloride 26.7g / L, surfactant (SDS)0.1g / L, WS 2 Nanoparticles 0.1g / L. After the preparation of the electro...

Embodiment 2

[0078] A kind of Ni-W / WS 2 Nanocomposite coating, differs from embodiment 1: in step (2), described Ni-W-WS 2 WS in composite plating solution 2 Nanoparticles are 0.2g / L. A coating sample 3 was obtained.

Embodiment 3

[0080] A kind of Ni-W / WS 2 Nanocomposite coating, differs from embodiment 1: in step (2), described Ni-W-WS 2 WS in composite plating solution2 Nanoparticles are 0.3g / L. A coating sample 4 was obtained.

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Abstract

The invention discloses a Ni-W-WS2 nano composite coating and a preparation method thereof. The preparation method comprises the following steps that S1, a base body is pretreated; S2, a Ni-W-WS2 composite electroplating solution is prepared, and ultrasonic pretreatment is performed on the Ni-W-WS2 composite electroplating solution; S3, the pretreated base body is put in the pretreated Ni-W-WS2 composite electroplating solution to be subjected to pulse electrodeposition, and an electrodeposition plated part is obtained; and S4, the electrodeposition plated part is cleaned, and the Ni-W-WS2 nano composite coating is obtained. By means of the Ni-W-WS2 nano composite coating and the preparation method thereof, the hardness of the nickel-tungsten coating can be remarkably improved, the friction coefficient of the coating can be reduced, the hydrophobic performance of the coating can be improved, even the super-hydrophobic effect can be achieved, the abrasion resistance, the corrosion resistance and the like can be remarkably improved, the adaptability of the coating to the actual application environment can be enhanced, and the base body also can be protected in the harsh industrial environment.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a Ni-W-WS 2 Nanocomposite coating and its preparation method. Background technique [0002] Ni-W coating has excellent properties such as high hardness, high wear resistance, strong oxidation resistance, uniform coating, and low porosity. Compared with the traditional Ni-Cr coating, the Ni-W coating does not have the harm of hexavalent chromium ions to the environment, which also makes it a strong competitor for new applications in the industrial field. During the electrodeposition process, the Ni-W coating also has some defects, such as the low efficiency of the cathode, which is inevitably accompanied by hydrogen evolution side reactions, which will induce the generation of internal stress in the coating, resulting in cracks and pinholes. In addition, in the actual application environment, the Ni-W coating also has certain limitations, such as low corrosion resistance,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/36C25D5/48C25D15/00
CPCC25D3/56C25D5/36C25D5/48C25D15/00
Inventor 何毅刘波何亚辉宋儒霞张志飞何腾李虹杰张意涵向宇鑫
Owner SOUTHWEST PETROLEUM UNIV
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