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Electrochemical oxidation method for treating surface of stainless steel

An oxidation treatment and electrochemical technology, applied in the direction of surface reaction electrolytic coating, electrolytic coating, coating, etc., can solve the problem of not being popularized and applied, and achieve the effect of low cost, good corrosion resistance and improved corrosion resistance.

Inactive Publication Date: 2006-02-22
CHANGZHOU GARDENSUN ANTI BACTERIAL MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it has not been popularized and applied in engineering

Method used

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Embodiment Construction

[0007] The present invention can be implemented in the following specific ways: select SUS304 stainless steel material, a mirror panel with a thickness of 1 mm, and degrease the stainless steel material according to a conventional method; then place it in an electrochemical oxidation mixture with a temperature of 40-60 ° C for treatment 8-15 minutes, the alternating current density is 20-50mA / dm 2 , the ratio per liter of the electrochemical oxidation mixed solution is 300-500 grams of sulfuric acid, 150-250 grams of chromic acid, 5-10 grams of molybdate, 5-10 grams of manganese salt, and the rest is water; then the surface Thickness is 10~100A 0 The stainless steel material with the oxide film is cleaned in clean water, and then conventionally dried. The working principle of the present invention is that the stainless steel material is produced in the anode area under the action of an alternating electric field in the oxidation mixture (Me refers to Fe, Ni, Mn, etc.), ...

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Abstract

A process for electrochemically oxidizing the surface of stainless steel includes degreasing the stainless steel material, and immersing it in the mixture of sulfuric acid, chromic acid, molybdate, Mn salt and water at 30-60 deg.C for 5-20 min while alternatively applying positive and negative currents by 10-100 mA / se.dm of current density at 5-30 S of intervals.

Description

1. Technical field [0001] The invention relates to a stainless steel surface oxidation treatment method, in particular to a stainless steel surface electrochemical oxidation treatment method. 2. Background technology [0002] Stainless steel materials are corrosion-resistant "stainless" in water, steam, and air, but in many corrosive media, especially those containing Nox, Sox, and CL - , SO 4 2- Pitting corrosion, pitting corrosion, crevice corrosion, etc. are easy to form in the gas and ion medium, and cannot meet the corrosion resistance requirements of more and more chemical, food, cosmetic, biopharmaceutical, electromechanical...etc. products. For this reason, in recent years, there have been many international technical patents, the use of materials through electrochemical grinding (polishing) and high-temperature passivation (non-dynamic) treatment in oxidizing acids (such as nitric acid, etc.) or oxidizing atmospheres, but it The corrosion resistance of the stainl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/00
Inventor 周国桢王思勤陈文银陈恩连周国良
Owner CHANGZHOU GARDENSUN ANTI BACTERIAL MATERIALS TECH