A kind of metal surface bluing method using low temperature plasma

A low-temperature plasma and metal surface technology, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of oxide film defects, large environmental pollution, and many parameters, and achieve simple operation and wide application range Broad, low-cost effects

Active Publication Date: 2020-07-31
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the process of bluing is relatively complicated, because the chemicals used in the chemical method are relatively polluting to the environment, which is not conducive to environmental protection and long-term industrial production; while the method of bluing with oxygen needs to control many parameters, which is inconvenient to operate
The bluing effect on the surface of steel or steel parts is not good, the formed oxide film is not beautiful enough, or the oxide film is defective, which affects the anti-corrosion effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A metal surface bluing method utilizing low-temperature plasma, comprising the steps of:

[0027] (1) Degreasing: boil the steel or steel parts in boiling degreasing solution for 20 minutes, then rinse in flowing deionized water to remove the degreasing solution on the surface of the steel or steel parts to remove surface oil stains;

[0028] The formula of the degreasing solution is: NaOH: 50~60g, NaOH 2 CO 3 : 70~80g, H 2 O: 1L;

[0029] (2) Pickling: Pickle the steel or steel parts in industrial hydrochloric acid with a mass concentration of 20% added with 0.2% urea of ​​hydrochloric acid for 60 seconds; after pickling, the steel or steel parts are first deionized Rinse with water, then add Na with a mass concentration of 3% 2 CO 3 Neutralize the residual acid in the solution, and the surface of the pickled steel or steel parts is silver-gray, so as to remove the rust and scale on the surface of the steel or steel parts and activate the surface at the same time;...

Embodiment 2

[0041] A metal surface bluing method utilizing low-temperature plasma, comprising the steps of:

[0042] (1) Degreasing: boil the steel or steel parts in a boiling degreasing solution for 30 minutes, then rinse in flowing deionized water to remove the degreasing solution on the surface of the steel or steel parts to remove surface oil stains;

[0043] The formula of the degreasing solution is: NaOH: 50~60g, NaOH 2 CO 3 : 70~80g, H 2 O: 1L;

[0044] (2) Pickling: Pickle the steel or steel parts in industrial hydrochloric acid with a mass concentration of 35% added with 0.5% urea of ​​hydrochloric acid for 35 seconds; after pickling, the steel or steel parts are first deionized Rinse with water, then put in 5% Na 2 CO 3 Neutralize the residual acid in the solution, and the surface of the pickled steel or steel parts is silver-gray, so as to remove the rust and scale on the surface of the steel or steel parts and activate the surface at the same time;

[0045] (3) Blue: the...

Embodiment 3

[0056] A metal surface bluing method utilizing low-temperature plasma, comprising the steps of:

[0057] (1) Degreasing: boil the steel or steel parts in a boiling degreasing solution for 25 minutes, then rinse in flowing deionized water to remove the degreasing solution on the surface of the steel or steel parts to remove surface oil stains;

[0058] The formula of the degreasing solution is: NaOH: 50~60g, NaOH 2 CO 3 : 70~80g, H 2 O: 1L;

[0059] (2) Pickling: Pickle the steel or steel parts in industrial hydrochloric acid with a mass concentration of 27% added with 0.3% urea of ​​hydrochloric acid for 50 seconds; after pickling, the steel or steel parts are first deionized Rinse with water, then put in 4% Na 2 CO 3 Neutralize the residual acid in the solution, and the surface of the pickled steel or steel parts is silver-gray, so as to remove the rust and scale on the surface of the steel or steel parts and activate the surface at the same time;

[0060] (3) Blue: the...

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PUM

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Abstract

The purpose of the present invention is to overcome the defects of the bluing process in the prior art, and provide a method for bluing metal surfaces using low-temperature plasma, which belongs to the technical field of metal material surface treatment. This method uses vacuum equipment to apply an electric field under a certain pressure to make the inert gas and H 2 O molecules undergo glow discharge and ionize to form a low-temperature plasma, producing activated O 2+ ion. o 2+ The ions are attracted by the negative potential applied to the steel or steel parts and bombard the workpiece surface. Active O 2+ The ions combine with the iron on the surface of the steel workpiece to cause a bluing reaction. The prepared bluish oxide film is compact, beautiful, low in cost, simple in operation, beneficial to industrialized production, and free of pollution. The preparation method of the invention realizes low-temperature plasma bluing treatment and has a wide range of applications.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment, and in particular relates to a metal surface bluing method using low-temperature plasma. Background technique [0002] The process of heating steel or steel parts to an appropriate temperature in air + water vapor or chemicals to form a protective blue or black oxide film on the surface is called bluing, also known as blackening. At present, the process of bluing is relatively complicated, because the chemicals used in the chemical method pollute the environment greatly, which is not conducive to environmental protection and long-term industrial production; while the method of introducing oxygen for bluing requires more parameters to be controlled, which is inconvenient to operate. As a result, the bluing effect on the surface of steel or steel parts is not good, the formed oxide film is not beautiful enough, or the oxide film is defective, which affects the anti-corrosio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/38C23C8/80
CPCC23C8/38C23C8/80
Inventor 赵卓赵志伟周艳文佟欣儒武俊生陈雪娇腾越张鑫张豫坤方方
Owner UNIV OF SCI & TECH LIAONING
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