Preparation technology for bacterial-resistant stainless steel

Abstract

The invention discloses a preparation technology for bacterial-resistant stainless steel. The preparation technology comprises steps of (1) conducting alkali-cleaning, chemical oxidization, aluminum deposition and acid-cleaning for stainless steel orderly to achieve a primary work piece, and (2) spraying silver glue body on the surface of the primary work piece and then sintering the primary work piece for 30 to 35 mins at the temperature of 300 to 500 DEG C. The chemical oxidization process is that the stainless steel work piece is placed in a steaming chamber; the steam chamber is filled with water steam; the chemical oxidization time is one to two hours; then the stainless steel work piece is taken out of the steam chamber and then immersed into thick sulfuric acid solution for 5 mins; the aluminum deposition process is that the aluminum glue body is sprayed on the surface of the stainless steel work piece and sintered at the temperature of 200 DEG C; and during the spraying, the primary work piece is at a vibrating state with vibration frequency of 100 to 150 times / min. By the use of the preparation technology, bacterial-resistant stainless steel can be prepared.

Description

Technical field [0001] The invention relates to a preparation process of antibacterial stainless steel. Background technique [0002] At present, stainless steel products have been widely used in food, tableware, medical equipment, etc. This also makes the stainless steel surface easy to breed bacteria, fungi and other microorganisms to form a long-lasting biofilm. This biofilm is extremely beneficial to people's health. Big threat. Therefore, with the improvement of people's living standards, there is an increasing demand for safe, durable, efficient and broad-spectrum antibacterial stainless steel. [0003] At present, the antibacterial stainless steels on the market mainly include copper-added antibacterial stainless steel, surface-coated antibacterial stainless steel, silver-added antibacterial stainless steel, etc. The heat treatment process of copper-added stainless steel plate is complicated, and too much copper will increase the number of micro-cracks in stainless steel. ...

AI Technical Summary

Problems solved by technology

[0003] Antibacterial stainless steel currently on the market mainly includes copper-added antibacterial stainless steel, surface-coated antibacterial stainless steel, silver-added antibacterial stainless steel, etc. The heat treatment process of copper-added stainless steel plates is complicated, and excessive copper addition will also lead to increased micro-cracks in stainless steel. In the end, the cost of copper-added stainless steel is too high, so it is necessary to strictly limit the amount of copper added, which also makes the antibacterial ability of copper-added stainless steel not strong

Surface-coated antibacterial stainless steel is mainly covered with a layer of titanium dioxide film on the surface of stainless steel. Since titanium dioxide only strongly absorbs ultraviolet rays with a wavelength less than 400nm in sunlight, the antibacterial stainless steel is antibacterial in environments with weak or no light. not effectively

Therefore, from the comprehensive consideration of safety and antibacterial properties, silver-added antibacterial stainless steel is the best, but the antibacterial effect and cost of silver or silver compounds and stainless steel are also very different.