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 effects of low cost, reduced pollution and good corrosion resistance.

Inactive Publication Date: 2004-03-10
CHANGZHOU GARDENSUN ANTI BACTERIAL MATERIALS TECH
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  • Abstract
  • Description
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Problems solved by technology

Therefore, it has not been popul

Method used

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[0007] Mixed solution (liter)

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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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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
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