Stainless steel surface treatment method capable of improving anti-corrosion capacity

A surface treatment, stainless steel technology, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as volatilization, protective coating and stainless steel substrate are easy to crack, and affect the performance of stainless steel products, etc., to achieve penetration The effect of good layer quality, easy process control and stable surface performance

Inactive Publication Date: 2018-02-27
江苏徐钢钢铁集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in vacuum sintering, the anti-rust Cr element in stainless steel will volatilize, thus affecting the performance of stainless steel products
Therefore, it can be considered to apply a protective coating on the surface of stainless steel to increase its corrosion resistance. However, practice has proved that the protective coating and the stainless steel substrate are easily detached, so how to improve the corrosion resistance of the stainless steel surface is a top priority.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The stainless steel surface treatment method to improve anti-corrosion ability includes the following steps:

[0016] (1) A steel sample with a size of 15*15*10mm was taken as the substrate, and aluminum nitride AlN was selected as the source material;

[0017] (2) The steel sample was polished with sandpaper for multiple passes, and then mechanically polished with 0.5 μm diamond spray polishing agent, then ultrasonically cleaned in acetone, alcohol, and deionized water for 10 minutes, dried, and packaged for use;

[0018] (3) Carry out aluminizing treatment with a double-layer glow plasma metallizing vacuum furnace, use a stainless steel cylinder as an auxiliary cathode, and place the substrate and aluminum nitride AlN in the auxiliary cathode;

[0019] (4) Start surface treatment: process parameters are frequency 55Hz, pole spacing 15mm, holding temperature 800°C, holding time 2h, source voltage 400V, cathode voltage 300V, after treatment the sample is cooled to room ...

Embodiment 2

[0025] The stainless steel surface treatment method to improve anti-corrosion ability includes the following steps:

[0026] (1) A steel sample with a size of 15*15*10mm was taken as the substrate, and aluminum nitride AlN was selected as the source material;

[0027] (2) The steel sample was polished with sandpaper for multiple passes, and then mechanically polished with 0.5 μm diamond spray polishing agent, then ultrasonically cleaned in acetone, alcohol, and deionized water for 10 minutes, dried, and packaged for use;

[0028] (3) Carry out aluminizing treatment with a double-layer glow plasma metallizing vacuum furnace, use a stainless steel cylinder as an auxiliary cathode, and place the substrate and aluminum nitride AlN in the auxiliary cathode;

[0029] (4) Start surface treatment: process parameters are frequency 60Hz, pole spacing 10mm, holding temperature 900°C, holding time 3h, source voltage 400V, cathode voltage 400V, after treatment the sample is cooled to room ...

Embodiment 3

[0032] The stainless steel surface treatment method to improve anti-corrosion ability includes the following steps:

[0033] (1) A steel sample with a size of 15*15*10mm was taken as the substrate, and aluminum nitride AlN was selected as the source material;

[0034] (2) The steel sample was polished with sandpaper for multiple passes, and then mechanically polished with 0.5 μm diamond spray polishing agent, then ultrasonically cleaned in acetone, alcohol, and deionized water for 10 minutes, dried, and packaged for use;

[0035] (3) Carry out aluminizing treatment with a double-layer glow plasma metallizing vacuum furnace, use a stainless steel cylinder as an auxiliary cathode, and place the substrate and aluminum nitride AlN in the auxiliary cathode;

[0036] (4) Start surface treatment: process parameters are frequency 55Hz, pole spacing 15mm, holding temperature 800°C, holding time 2h, source voltage 600V, cathode voltage 400V, after treatment the sample is cooled to room ...

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PUM

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Abstract

The invention discloses a stainless steel surface treatment method capable of improving the anti-corrosion capacity. The stainless steel surface treatment method comprises the following steps that a steel sample with the size being 15*15*10 mm is cut to serve as a base material, and AlN is selected to serve as a source electrode material; the steel sample is subjected to abrasive paper grinding and mechanical polishing many times and then sequentially cleaned and dried; and aluminum diffusion treatment is conducted through a double-layer glow plasma surface alloying vacuum furnace, a stainlesssteel cylinder serves as an auxiliary cathode, the base material and the AlN are placed in the auxiliary cathode, surface treatment begins to be conducted, and the sample is cooled to be the indoor temperature with a furnace after treatment. According to the stainless steel surface treatment method capable of improving the anti-corrosion capacity, operation is easy, the implementation process isenvironmentally friendly and free of pollution, and the combining force between a diffusion layer and a base body is increased; AlN is selected to serve as the source electrode material and can generate N2 in a reaction, other oxidation reactions are avoided, and the cleanliness of the surface layer of steel is improved; and an anti-corrosion aluminium oxide surface layer can be formed on the surface of the stainless steel with the passage of time, after an oxidation film is formed on the surface, further infiltration of oxygen atoms can be effectively prevented, and the overall surface performance is stable.

Description

technical field [0001] The invention relates to a stainless steel surface treatment method for improving anticorrosion capability, which belongs to the field of metal processing. Background technique [0002] Due to its excellent performance, stainless steel has been widely used in all aspects of production and life. Finished stainless steel can be obtained in a number of ways. In powder metallurgy, stainless steel powder is densified by high-temperature sintering to obtain products, among which vacuum sintering is a very common method. However, in vacuum sintering, the anti-rust Cr element in stainless steel will volatilize, thereby affecting the performance of stainless steel products. Therefore, it can be considered to apply a protective coating on the surface of stainless steel to increase its corrosion resistance. However, practice has proved that the protective coating and the stainless steel substrate are easily detached, so how to improve the corrosion resistance o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/28C23C10/02
CPCC23C10/28C23C10/02
Inventor 张晴晴罗锋魏贤文
Owner 江苏徐钢钢铁集团有限公司
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