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Preparation process of chemical plating rare earth cerium Ni-P-PTFE (Polytetrafluoroethylene) composite coating

A composite coating, rare earth cerium technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problem of uneven PTFE coating, achieve low cost, good self-lubricating effect, improve wear resistance and The effect of antifouling properties

Active Publication Date: 2015-03-18
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a kind of preparation method of chemical plating Ni-P-PTFE composite coating, solve the problems such as uneven PTFE plating, low PTFE content that chemical plating Ni-P-PTFE composite coating may exist, improve coating resistance Grinding and anti-scaling properties

Method used

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  • Preparation process of chemical plating rare earth cerium Ni-P-PTFE (Polytetrafluoroethylene) composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The bath configuration:

[0028] Plating: nickel sulfate 15g / L, sodium hypophosphite 15g / L, citric acid 10g / L, activator 0.2g / L, PTFE emulsion 6g / L, cerium sulfate 4g / L, pH 6, temperature 85°C, Time 1h; mechanical stirring: 400r / min;

Embodiment 2

[0030] The bath configuration:

[0031] Plating: nickel sulfate 10g / L, sodium hypophosphite 10g / L, citric acid 5g / L, activator 0.8g / L, PTFE emulsion 4g / L, cerium sulfate 2g / L, pH 6.0, temperature 80℃, Time 1.25h, mechanical stirring: 450r / min;

Embodiment 3

[0033] The bath configuration:

[0034] Plating: nickel sulfate 12g / L, sodium hypophosphite 12g / L, citric acid 8g / L, activator 0.6g / L, PTFE emulsion 8g / L, cerium sulfate 5g / L, pH 7, temperature 85℃, Time 1.5h; mechanical stirring: 500r / min;

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Abstract

The invention relates to a preparation method of a chemical sedimentation rare earth cerium Ni-P-PTFE (Polytetrafluoroethylene) composite coating. Based on a chemical Ni-P-PTFE composite plating process and the characteristics of a rare earth cerium atom, the Ni-P-PTFE composite coating is prepared on a steel 20 matrix by virtue of a mechanical stirring method. The method comprises the following specific steps of pretreating a sample; preparing a plating solution containing 10-15g / L nickel sulfate, 10-15g / L sodium hypophosphite, 5-10g / L citric acid and 2-8g / L cerium sulfate; preparing a mixed solution of 4-11g / L PTFE emulsion and 0.2-0.8g / L an active agent FC-134; mixing the plating solution with the mixed solution; cleaning the sample; activating with hydrochloric acid; washing with water; plating; and washing with water and drying. The Ni-P-PTFE composite coating prepared by the preparation method, which is disclosed by the invention, has the advantages of small friction coefficient, good wear resistance and antifouling property and the PTFE particles in the coating are evenly distributed.

Description

technical field [0001] The invention relates to an anti-corrosion and anti-scaling composite coating. More specifically, it relates to a coating process for chemically depositing rare earth cerium Ni-P-PTFE composite coating. Background technique [0002] At present, the electroless Ni-P-PTFE composite coating is widely used in the fields of chemical industry, national defense, and precision instrument manufacturing because it contains PTFE, which has good wear resistance, anti-scaling properties, and less porosity. However, the Ni-P-PTFE coating may be affected by factors such as stirring and temperature during the plating process, and there may be problems such as uneven distribution of PTFE particles or a small content, which will affect the wear resistance and anti-scaling performance of the coating. Rare earth cerium has a great influence on the anti-corrosion and anti-scaling properties of the coating, especially the influence of PTFE content in the coating, friction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36
CPCC23C18/50
Inventor 付传起王宙
Owner PETROCHINA CO LTD
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