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Introduction to the Dehydrogenation Technology of Stainless Steel Tubes
I. Basic Principle
Stainless steel pipes are a type of high-strength and corrosion-resistant metal material. However, during the manufacturing process, they are prone to be contaminated by hydrogen peroxide, which affects their performance and quality. Therefore, dehydrogenation treatment is necessary.
The basic principle of dehydrogenation for stainless steel pipes is to remove hydrogen peroxide from the pipe body in order to reduce the content of oxides and increase the content of metal elements in the material. Dehydrogenation treatment can improve the mechanical properties and corrosion resistance of stainless steel pipes.
II. Common Dehydrogenation Technologies
1. Vacuum Dehydrogenation
Vacuum dehydrogenation is a process carried out under high vacuum conditions. Through the volatilization of hydrogen molecules in the environment at low pressure, the oxides on the surface of the stainless steel tube are removed, achieving the purpose of dehydrogenation. Vacuum dehydrogenation can effectively improve the quality and performance of the stainless steel tube, but the equipment cost is relatively high, and its application is relatively limited in general stainless steel tube manufacturers.
2. Hydrogen Dehydrogenation
Hydrogen dehydrogenation is a dehydrogenation method where stainless steel tubes are placed in a hydrogen atmosphere. This method has a fast dehydrogenation rate and excellent results, effectively reducing the oxide content in the stainless steel tubes. However, if not controlled properly, it may cause hydrogen to adhere to the surface of the stainless steel tubes, leading to potential safety hazards.
3. Hydrogen removal by oxidation film method
The oxidation film method for hydrogen removal is a commonly used surface treatment method for stainless steel. This method involves placing stainless steel tubes in a rotating kiln and using an oxidant for hydrogen removal. Compared to vacuum hydrogen removal, this method has lower costs and better effects, but it requires a longer processing time and has certain impacts on the material of the stainless steel tubes.
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