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A kind of antibacterial thin-wall stainless steel pipe and preparation method thereof

A stainless steel tube and stainless steel plate technology, applied in the field of bacteriostatic thin-walled stainless steel tube and its preparation, can solve the problems of single visual effect, copper surface cracks, low antibacterial performance, etc., to avoid secondary pollution, improve surface hardness, and improve The effect of antibacterial properties

Active Publication Date: 2022-05-03
宁波市华涛不锈钢管材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At the end of the last century, plastic pipes such as PPR and PE, and composite pipes such as steel-plastic pipes and aluminum-plastic pipes were vigorously developed in building domestic water supply pipes. However, such plastic pipes and composite pipes generally have problems such as poor low-temperature toughness and easy cracking. limited in practical applications
Chinese patent CN107903507B provides a PPR pipe with good low-temperature toughness and stainless steel effect. Although it solves the problems of poor low-temperature toughness and single visual effect in the prior art, its product strength and hardness are still far lower than stainless steel pipes.
Such as Chinese patents CN108728768B and CN108728762B, all prepared copper-containing antibacterial stainless steel, wherein the copper content is no more than 5%, because the copper content is low, the excellent antibacterial performance cannot be obtained, so the Ga element is added in the chemical composition, but still needs The higher temperature heat treatment process causes the copper-rich phase particles to precipitate, and when it is actually in contact with food solutions or pharmaceutical reagents, a large amount of iron, the main element in stainless steel, will also dissolve, which promotes bacterial proliferation to a certain extent and weakens the antibacterial effect of copper ions
However, increasing the copper content will easily cause defects such as surface cracks in the material during thermal processing, which will affect the original physical and chemical properties of the stainless steel pipe, and although the dissolution of a large amount of copper ions has a strong antibacterial effect, it may also pollute the pipes. liquid, causing excess copper to dissolve in water or other solvents and accumulate in food or pharmaceuticals, posing health and safety hazards

Method used

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  • A kind of antibacterial thin-wall stainless steel pipe and preparation method thereof
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  • A kind of antibacterial thin-wall stainless steel pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Mix acrylamide, methacryloyloxyethylammonium chloride and 4-chloromethylstyrene, fill with nitrogen, control the reaction temperature to 60°C in a nitrogen atmosphere, then add ammonium sulfate as an initiator, and stir for 10 hours ;

[0047] After the reaction, add absolute ethanol to the product for extraction to obtain a white prepolymer, which is freeze-dried to obtain pure CPA;

[0048] After mixing CPA, EL and 1mol / L sodium hydroxide solution, react at 80°C for 4 hours to obtain a mixed solution;

[0049] After cooling to room temperature, add acetone for extraction, discard the upper liquid, put the remaining tan solid product into a dialysis bag for 72 hours of dialysis, concentrate and freeze-dry to obtain pure L-CPA;

[0050] And the prepared L-CPA is formulated into a 1.5g / L L-CPA solution for subsequent use;

[0051] Take 06Cr19Ni10 steel scrap raw material, forge it into a green body, carry out solid solution treatment at 880-890°C for 45min, and then ca...

Embodiment 2

[0056] Take 06Cr19Ni10 scrap steel raw material, forge it into a green body, carry out solid solution treatment at 900-910 ° C, the solution time is 40 minutes, and then carry out aging treatment at 700 ° C, the aging time is 1.5 hours, to obtain stainless steel plate, after testing the stainless steel plate The chemical composition in it is: Cr: 18.03%, Ni: 8.14%, Mo: 0.26%, Mn: 0.90%, Si: 0.54%, N: 0.042%, C: 0.051%, P: 0.033%, S: 0.001 %, the balance is Fe and unavoidable impurities;

[0057] Use 200-300 mesh quartz sand to sandblast the surface of the stainless steel plate for 25 minutes, then coat the surface with the L-CPA solution prepared in Example 1, and dry it at 85°C to form L-CPA film;

[0058] Put the stainless steel plate into the magnetron sputtering coating equipment, put Cu powder and C powder as the sputtering target material into the target holder, and vacuumize to 1×10 -3 Pa, flow argon and nitrogen at a flow ratio of 0.36:1, set the substrate bias to -1...

Embodiment 3

[0061] Take 06Cr19Ni10 scrap steel raw material, forge it into a green body, carry out solid solution treatment at 905-915°C for 40 minutes, and then carry out aging treatment at 656°C for 2 hours to obtain stainless steel plates. The chemical composition is as follows: Cr: 18.19%, Ni: 8.20%, Mo: 0.32%, Mn: 0.91%, Si: 0.49%, N: 0.038%, C: 0.05%, P: 0.029%, S: 0.002% , the balance being Fe and unavoidable impurities;

[0062] Use 200-300 mesh quartz sand to sandblast the surface of the stainless steel plate for 23 minutes, then coat the surface with the L-CPA solution prepared in Example 1, and dry it at 85°C to form L-CPA film;

[0063] Put the stainless steel plate into the magnetron sputtering coating equipment, put Cu powder and C powder as the sputtering target material into the target holder, and vacuumize to 1×10 -3 Pa, flow argon and nitrogen at a flow ratio of 0.3:1, set the substrate bias to -160V, set the Cu target sputtering power to 265W, the C target sputtering ...

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Abstract

The invention belongs to the technical field of stainless steel processing, and in particular relates to an antibacterial thin-walled stainless steel pipe and a preparation method thereof. The surface of the stainless steel pipe of the present invention has an antibacterial strengthening layer, and the stainless steel pipe includes the following chemical components in weight percentage: Cr: 17.50-19.50%, Ni: 8.00-10.50%, Mo: 0.20-0.40%, Mn≤2.00%, Si≤0.75%, N≤0.10%, C≤0.07%, P≤0.04%, S≤0.03%, the balance is Fe and unavoidable impurities; the antibacterial strengthening layer is L‑CPA / Cu / C composite film. The antibacterial strengthening layer of the present invention not only endows the surface of the stainless steel pipe with good antibacterial performance, but also greatly improves the surface hardness, wear resistance and corrosion resistance, and avoids the adverse effect of adding copper directly to the stainless steel raw material on the thermal processing performance. At the same time, through a reasonable process, the unique network structure of L-CPA can fully exert the adsorption and purification function, and the Cu element can fully exert the antibacterial effect.

Description

technical field [0001] The invention belongs to the technical field of stainless steel processing, and in particular relates to an antibacterial thin-walled stainless steel pipe and a preparation method thereof. Background technique [0002] At the end of the last century, plastic pipes such as PPR and PE, and composite pipes such as steel-plastic pipes and aluminum-plastic pipes were vigorously developed in building domestic water supply pipes. However, such plastic pipes and composite pipes generally have problems such as poor low-temperature toughness and easy cracking. limited in practical applications. Chinese patent CN107903507B provides a PPR pipe with good low-temperature toughness and stainless steel effect. Although it solves the problems of poor low-temperature toughness and single visual effect in the prior art, its product strength and hardness are still far lower than stainless steel pipes. With the development of water supply pipelines and the improvement of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/44C22C38/58C23C14/06C23C14/16C23C14/35B05D7/14
CPCC22C38/44C22C38/58C22C38/02C22C38/001C23C14/352C23C14/0611C23C14/16B05D7/14
Inventor 赵志江缪德伟
Owner 宁波市华涛不锈钢管材有限公司
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