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Aluminizing medium-free aluminizing method for surface of carbon steel

A carbon steel and aluminizing technology, applied in the field of aluminizing preparation technology on the surface of carbon steel, can solve the problems of easy adhesion, long aluminizing cycle, irritation, etc., and achieve dense coating, short aluminizing cycle, and production efficiency. high effect

Pending Publication Date: 2020-11-03
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface infiltrating agent of the aluminized layer prepared by powder aluminizing is prone to sticking, the aluminizing cycle is longer, and the infiltrating agent ammonium chloride is irritating to the skin and mucous membranes, and the ammonia gas decomposed will poison the aluminizing process.

Method used

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  • Aluminizing medium-free aluminizing method for surface of carbon steel
  • Aluminizing medium-free aluminizing method for surface of carbon steel
  • Aluminizing medium-free aluminizing method for surface of carbon steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The carbon steel substrate with a size of 2cm×2cm is polished step by step with 150#, 400#, 1000# and 2000#, then ultrasonically degreased with acetone for 5min, dried in cold air, and placed in a drying dish for use.

[0035] Place the processed sample in the vacuum chamber of the ion sputtering equipment, and discharge the air in the vacuum chamber. When the pressure of the vacuum chamber is less than 0.01Pa, turn on the heating switch and control the temperature of the vacuum chamber at about 100°C.

[0036] Argon is introduced into the vacuum chamber, and the pressure of the vacuum chamber is maintained at 0.9 Pa by adjusting the inlet valve and the outlet valve.

[0037] Turn on the ion sputtering power supply, adjust the substrate voltage at -500V, and maintain it for 5min.

[0038] Reduce the substrate voltage to -100V, start the sputtering current, adjust the sputtering current to about 25A, and maintain it for 120min;

[0039] Adjust the sputtering current to ...

Embodiment 2

[0041] A carbon steel substrate with a size of 2cm×3cm was blasted with 300-mesh diamond for 5 minutes, then ultrasonically dusted with acetone for 5 minutes, dried in cold air, and placed in a drying dish for use.

[0042] Place the processed sample in the vacuum chamber of the ion sputtering equipment, and discharge the air in the vacuum chamber. When the pressure of the vacuum chamber is less than 0.01Pa, turn on the heating switch and control the temperature of the vacuum chamber at about 300°C.

[0043] Argon is introduced into the vacuum chamber, and the pressure of the vacuum chamber is maintained at 1.5 Pa by adjusting the inlet valve and the outlet valve.

[0044] Turn on the ion sputtering power supply, adjust the substrate voltage at -600V, and maintain it for 10min.

[0045] Reduce the substrate voltage to -300V, start the sputtering current, adjust the sputtering current to about 60A, and maintain it for 60min;

[0046] Adjust the sputtering current to 0A, the su...

Embodiment 3

[0048] The carbon steel substrate with a size of 3cm×4cm is polished step by step with 150#, 400#, 1000# and 2000#, then ultrasonically degreased with acetone for 10min, dried in cold air, and placed in a drying dish for use.

[0049] Place the treated sample in the vacuum chamber of the ion sputtering equipment, and discharge the air in the vacuum chamber. When the pressure of the vacuum chamber is less than 0.01Pa, turn on the heating switch and control the temperature of the vacuum chamber at about 500°C.

[0050] Argon is introduced into the vacuum chamber, and the pressure of the vacuum chamber is maintained at 2.5 Pa by adjusting the inlet valve and the outlet valve.

[0051] Turn on the ion sputtering power supply, adjust the substrate voltage at -800V, and maintain it for 5min.

[0052] Reduce the substrate voltage to -500V, start the sputtering current, adjust the sputtering current to about 80A, and maintain it for 40min;

[0053] Adjust the sputtering current to 0A...

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Abstract

The invention relates to an aluminizing medium-free aluminizing method for the surface of carbon steel. At present, aluminizing processes comprise a hot-dip aluminizing process, a chemical vapor aluminizing process, a powder aluminizing process and the like, a surface aluminizing medium is prone to bond in the most common powder aluminizing process, a aluminizing promoter ammonium chloride has irritation to skin and mucous membranes, and decomposed ammonia gas causes poisoning to the aluminizing process. The invention relates to an aluminizing technology without an aluminizing medium on the surface of carbon steel. The technology comprises the steps that (1) rust removal, oil removal and drying are carried out on the surface of the carbon steel; (2) the carbon steel is placed in an ion sputtering vacuum chamber, and the pressure and the temperature of the vacuum chamber are regulated and controlled within a certain range; and (3) an aluminized coating is prepared on the carbon steel inthe vacuum chamber under certain voltage and current. The aluminized layer is obvious in structure and excellent in corrosion resistance, and the aluminizing medium-free aluminizing technology for the surface of the carbon steel is non-toxic, pollution-free, low in energy consumption and easy to operate, and has a certain promoting effect on improving the corrosion resistance and high-temperatureresistance of aluminized steel.

Description

technical field [0001] The invention belongs to the field of metal anticorrosion, and in particular relates to a preparation process for carbon steel surface aluminizing. Background technique [0002] Surface treatment is usually used to further improve the corrosion resistance of steel, and coating preparation technology is the most commonly used corrosion control method. In a corrosive environment, a dense oxide film can be formed on the surface of aluminum and aluminum alloys in a corrosive environment and high-temperature oxidation environment. It is often used as a corrosion-resistant coating material to achieve long-term anti-corrosion effects through different processes. [0003] Aluminizing is mainly used in pipes and containers used in chemical industry, metallurgy and construction departments, and can save a lot of stainless steel and heat-resistant steel. In the machine building sector, the application range of aluminizing is also constantly expanding. Low-carbo...

Claims

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Application Information

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IPC IPC(8): C23C14/16C23C14/34
CPCC23C14/165C23C14/34
Inventor 师超辛常乐高鹏军刘志鑫俞睽吕弘瑞徐子豪
Owner NANCHANG HANGKONG UNIVERSITY
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