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Antibacterial stainless steel with electrochemical oxidation film

An antibacterial stainless steel and oxide film technology, applied in the field of metal surface treatment, can solve the problems of difficulty and high cost

Inactive Publication Date: 2010-06-23
CHANGZHOU GARDENSUN ANTI BACTERIAL MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] A factory in my country has developed antibacterial stainless steel filled with silver in the vacuum titanium-coated film, but because of its high cost, it is difficult to solve the problem of silver discoloration on the surface

Method used

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  • Antibacterial stainless steel with electrochemical oxidation film
  • Antibacterial stainless steel with electrochemical oxidation film
  • Antibacterial stainless steel with electrochemical oxidation film

Examples

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Effect test

Embodiment 1

[0080] A preparation method of an electrochemical oxidation film antibacterial stainless steel, the method is, the stainless steel material after the degreasing treatment is placed in the electrochemical oxidation mixed solution, and the positive and negative electricity are alternately changed, and the current density is 10mA / dm 2 , after 5 minutes of treatment at a temperature of 30°C, a thin layer of spinel oxide film is formed, which is then washed in clear water and then dried. The proportion of the electrochemical oxidation mixed solution per liter is : 200 grams of sulfuric acid, 50 grams of chromic acid, 5 grams of ammonium molybdate, 5 grams of manganese sulfate, 0.1 grams of silver salt, 0.2 grams of rare earth sulfate or nitrate.

[0081] The time for alternating positive and negative currents is 5 seconds in the positive direction and 5 seconds in the negative direction.

Embodiment 2

[0083] A preparation method of electrochemical oxidation film antibacterial stainless steel, the method is, the stainless steel material after the degreasing treatment is placed in the electrochemical oxidation mixed solution, and the positive and negative electricity are alternately changed, and the current density is 100mA / dm 2 , after 20 minutes of treatment at a temperature of 60°C, a thin layer of spinel oxide film is formed, which is then washed in clear water and then dried. The proportion per liter of the electrochemical oxidation mixed solution is : 500 grams of sulfuric acid, 250 grams of chromic acid, 20 grams of ammonium molybdate, 20 grams of manganese sulfate, 10 grams of silver salt, 20 grams of rare earth sulfate or nitrate.

[0084] The time for alternating positive and negative currents is 30 seconds in the positive direction and 30 seconds in the negative direction.

Embodiment 3

[0086] The present invention also provides a preparation method of electrochemical oxidation film antibacterial stainless steel, the method is, the stainless steel material after the degreasing treatment is placed in the electrochemical oxidation mixed solution, and the positive and negative electricity are alternately changed, and the current density is 10-100mA / dm 2 (Example selection: 10, 60 or 100mA / dm 2 ), at a temperature of 30-60° C., after 5 to 20 minutes of treatment (selection of the embodiment: 5, 15 or 20 minutes of treatment at 30, 40 or 60° C.), a thin layer of spinel oxide film is formed , and then it is cleaned in clear water, and then dried. The proportion per liter of the electrochemical oxidation mixed solution is: 200-500 grams of sulfuric acid (selected in the embodiment: 200, 300 or 500 grams), and 50 grams of chromic acid. ~250 grams (embodiment selection: 50,180 or 250 grams), ammonium molybdate is 5~20 grams (embodiment selection: 5,15 or 20 grams), ...

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Abstract

The invention discloses antibacterial stainless steel with an electrochemical oxidation film. The stainless steel comprises a stainless steel matrix, wherein an antibacterial oxidation film is covered on the stainless steel matrix and the antibacterial oxidation film is a spinel type oxidation film. The invention also discloses a preparation method of the antibacterial stainless steel with the electrochemical oxidation film. The method comprises the following steps: placing a defatted stainless steel material in an electrochemical oxidation mixed solution, alternately changing positive electricity and negative electricity, wherein the current density is 10-100mA / dm<2>; processing for 5-20 minutes at 30-60 DEG C to form a thin spinel oxidation film, then cleaning the oxidation film with clean water and drying. The electrochemical oxidation mixed solution per litre is prepared by the following components: 200-500g of sulfuric acid, 50-250g of chromic acid, 5-20g of ammonium molybdate, 5-20g of manganese sulfate, 0.1-10g of silver salt and 0.2-20g of rare earth sulfate or rare earth nitrate. The invention has good antibacterial effect.

Description

technical field [0001] The invention belongs to the international patent C25D classification in the technical field of metal surface treatment, and relates to an antibacterial stainless steel with an electrochemical oxidation film. Background technique [0002] In recent years, many advanced industrial countries have competed to develop antibacterial stainless steel products. Taking Japan, which produces the most new products, as an example, there are coated antibacterial stainless steel, alloy antibacterial stainless steel, and composite antibacterial stainless steel. [0003] 1. Coated antibacterial stainless steel [0004] That is, coat epoxy resin, acrylic resin, polyester resin and other paint films on the surface of stainless steel materials, add 0.01-5.0% by mass of antibacterial agents such as 2-0 pyridine-1-sulfurized zinc oxide salt to the resin, and heat it at 280 ° C. Stainless steel material with antibacterial effect after baking for a few minutes, such as Daid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
CPCC25D11/34
Inventor 周国桢王思勤
Owner CHANGZHOU GARDENSUN ANTI BACTERIAL MATERIALS TECH
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