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Method for increasing high-temperature discoloration resistance of stainless steel workpiece

A stainless steel, high temperature resistant technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., to achieve the effect of improving anti-high temperature discoloration

Inactive Publication Date: 2018-10-30
ZHEJIANG SUPOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the defects existing in the above prior art, and provides a method for improving the high-temperature discoloration resistance of stainless steel workpieces. The problem to be solved is how to improve the high-temperature discoloration resistance of stainless steel workpieces so that yellowing is not easy to occur

Method used

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  • Method for increasing high-temperature discoloration resistance of stainless steel workpiece
  • Method for increasing high-temperature discoloration resistance of stainless steel workpiece
  • Method for increasing high-temperature discoloration resistance of stainless steel workpiece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Put the processed stainless steel workpiece (stainless steel cookware) into the following aqueous solution of sulfosalicylic acid to carry out anodic electrolytic treatment to selectively remove iron elements. The specific anodic electrolytic treatment conditions are as follows:

[0070]

[0071] After the anodic electrolysis treatment, the surface is cleaned to remove the electrolyte on the surface. It can be cleaned with lye first, then rinsed with water until it becomes neutral, and dried to obtain the corresponding stainless steel workpiece cookware products that are resistant to high temperature and discoloration.

Embodiment 2

[0073] Put the processed stainless steel workpiece (stainless steel cookware) into the following aqueous solution of sulfosalicylic acid to carry out anodic electrolytic treatment to selectively remove iron elements. The specific anodic electrolytic treatment conditions are as follows:

[0074]

[0075] After the anodic electrolysis treatment, the surface is cleaned to remove the electrolyte on the surface. It can be cleaned with lye first, then rinsed with water until it becomes neutral, and dried to obtain the corresponding stainless steel workpiece cookware products that are resistant to high temperature and discoloration.

Embodiment 3

[0077] Put the processed stainless steel workpiece (stainless steel cookware) into the following aqueous solution of citric acid to carry out anodic electrolytic treatment to selectively remove iron elements. The specific anodic electrolytic treatment conditions are as follows:

[0078]

[0079] After the anodic electrolysis treatment, the surface is cleaned to remove the electrolyte on the surface. It can be cleaned with lye first, then rinsed with water until it becomes neutral, and dried to obtain the corresponding stainless steel workpiece cookware products that are resistant to high temperature and discoloration.

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Abstract

The invention relates to a method for increasing the high-temperature discoloration resistance of a stainless steel workpiece, and belongs to the technical field of stainless steel surface treatment.In order to solve the problem of yellow discoloration of an existing stainless steel workpiece at high temperature, the invention provides an electrolytic treatment method for increasing the high-temperature discoloration resistance of the stainless steel workpiece. The method is characterized by comprising the steps of immersing the stainless steel workpiece into a solution of oxygenated ligand organic acid for anode electrolytic treatment, wherein the oxygenated ligand organic acid and metal iron ions can form metal chelate, and cleaning after the anode electrolytic treatment, so that the high-temperature discoloration resistant stainless steel workpiece is obtained. According to the method, the mode that the oxygenated ligand organic acid and anode electrolysis are combined is adopted to treat the stainless steel surface, so that the electrolytic iron ions and the oxygenated ligand organic acid can effectively form the metal chelate, iron elements on the stainless steel surface areeffectively removed, the characteristics of chromium or chromated nickel are enriched, and the capability of increasing the high-temperature discoloration resistance is achieved.

Description

technical field [0001] The invention relates to a method for improving the high-temperature discoloration resistance of stainless steel workpieces, and belongs to the technical field of stainless steel surface treatment. Background technique [0002] In the cookware industry, stainless steel is widely used due to its corrosion resistance and high strength. Stainless steel is highly praised for its hardness, wear resistance, and non-reaction with food. In addition, ferritic stainless steel has magnetic properties, which can be used as contact materials for induction cookers, and is also widely used in the cookware industry. [0003] However, during the cooking process of stainless steel products, when the temperature exceeds 200°C, the stainless steel will start to turn yellow. This means that the defect that the general stainless steel material is easy to turn yellow during use is a state. Analysis of the reason for its yellowing is mainly due to the fact that stainless st...

Claims

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Application Information

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IPC IPC(8): C25D11/00
CPCC25D11/00
Inventor 徐存荣
Owner ZHEJIANG SUPOR CO LTD
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