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Differential arc oxidization abrasive polishing method for stainless steel surface

A technology of micro-arc oxidation and stainless steel, which is applied in the direction of anodic oxidation, etc., can solve the problems that ordinary stainless steel cannot meet the performance requirements, pitting corrosion, and high cost of stainless steel materials, so as to improve the protection performance and application field, the process is stable and reliable, and the equipment is simple Effect

Inactive Publication Date: 2008-10-01
江门市福斯特金属表面处理技术发展有限公司
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Problems solved by technology

[0002] Ordinary stainless steel materials have good corrosion resistance "stainless" performance in water, steam and air, but in many corrosive media such as Cl - , SO 4 2- It is easy to form pitting corrosion, pitting corrosion, crevice corrosion, etc. in the medium, so ordinary stainless steel cannot meet the performance requirements of more and more fields such as chemical industry, food, biopharmaceutical, etc.
Although it is now known that stainless steel with high nickel content has better oxidation resistance, so that it can achieve the expected "stainless" purpose, thereby expanding the application field of ordinary stainless steel materials, but due to the lack of resources of raw material nickel, resulting in high nickel content The cost of stainless steel material is higher
People generally use the method of oxidizing the surface of stainless steel to improve the corrosion resistance of stainless steel, but the effect is not very satisfactory.

Method used

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Embodiment

[0015] The micro-arc oxidation grinding and polishing method for the surface of stainless steel of the present invention is to first mechanically polish the surface of the stainless steel product, then perform degreasing treatment, and then clean the stainless steel product after the degreasing treatment, and then place the stainless steel product in a place containing polyphosphoric acid In the electrolyte solution of sodium 2-30%, sodium fluorosilicate 5-10%, potassium fluorotitanate 0.5-5%, p-aminobenzenesulfonic acid 0.1-1%, polyvinyl alcohol 0.1-0.5%, connect the sine wave The reversing power supply applies a voltage of 20-300V to the stainless steel product at a temperature of 20-35°C, forming a micro-arc discharge on the surface of the workpiece, making the surface of the stainless steel product interact with the electrolyte solution, resulting in reversible dissolution and passivation. reaction, so as to dissolve the protruding part of the stainless steel surface to pla...

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Abstract

The invention discloses a polishing method of non-corrosive steel surface by differential arc. The invention comprises the following steps: exerting mechanically polishing and degreasing on surface of stainless steel products; cleaning it; placing said stainless steel products in electrolyte solution and intensifying reaction near anode to form intensified oxidation film on it by using sine-wave differential arc that is generated by sine-wave current; cleaning and drying it. The invention resolves the previous problem that differential arc oxidization can not be processed on surface of stainless steel watch.

Description

technical field [0001] The invention relates to a stainless steel surface treatment method, in particular to a method for forming a reinforced oxide film on the stainless steel surface. Background technique [0002] Ordinary stainless steel materials have good corrosion resistance "stainless" performance in water, steam and air, but in many corrosive media such as Cl - , SO 4 2- Pitting corrosion, pitting corrosion, crevice corrosion, etc. are easy to form in the medium, so ordinary stainless steel cannot meet the performance requirements of more and more fields such as chemical industry, food, and biopharmaceuticals. Although it is now known that stainless steel with high nickel content has better oxidation resistance, so that it can achieve the expected "stainless" purpose, thereby expanding the application field of ordinary stainless steel materials, but due to the lack of resources of raw material nickel, resulting in high nickel content The cost of stainless steel ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/34
Inventor 梁伟平
Owner 江门市福斯特金属表面处理技术发展有限公司
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