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A kind of stainless steel electrochemical coloring solution and coloring method

A coloring liquid, stainless steel technology, applied in anodizing and other directions, can solve the problems of poor surface permeability of stainless steel, difficult electrolysis process, long coloring time, etc., to achieve short coloring time, avoid secondary corrosion, simple and easy to control operation. Effect

Active Publication Date: 2017-08-25
辽宁诚德新材料有限公司
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Problems solved by technology

[0003] The traditional INCO method only contains chromic anhydride and sulfuric acid. When treating different stainless steels, it often has poor permeability to the surface of specific stainless steels, which leads to problems such as long coloring time, uneven coloring, and difficult control of the electrolysis process.

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  • A kind of stainless steel electrochemical coloring solution and coloring method
  • A kind of stainless steel electrochemical coloring solution and coloring method
  • A kind of stainless steel electrochemical coloring solution and coloring method

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Embodiment Construction

[0024] The content of the present invention is further described below by way of examples.

[0025] Adopt 304 stainless steel test pieces as the colored stainless steel sample piece in the embodiment.

[0026] First, degreasing, derusting, polishing, and surface activation are carried out on the above-mentioned stainless steel parts. Oil and rust removal can be done by cleaning with acetone and rust remover. The polishing process uses chemical polishing. The polishing solution is composed of 230ml / L sulfuric acid, 70ml / L hydrochloric acid, 80ml / L nitric acid, and 8ml / L phosphoric acid. The stainless steel test piece is impregnated In the chemical polishing solution for 3-5 minutes, until the surface of the stainless steel sheet is smooth and bright.

[0027] The surface activation process is: 15% H in mass percentage 2 SO 4 Immerse in the aqueous solution at a temperature of 35°C for 5 minutes.

[0028] The second step: electrochemical coloring, the pretreated stainless st...

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Abstract

The invention discloses a stainless steel electrochemical coloring liquid, the solvent is water, and the feature is that: the component content of the coloring liquid is 100-120g / L chromium trioxide, 90-120g / L chromium sulfate, 98% concentrated sulfuric acid 160‑220ml / L, 5‑12g / L zinc nitrate, 3‑5g / L sodium citrate, 1‑3g / L coconut oil fatty acid diethanolamide. The application of the coloring liquid and the coloring method in the present invention can not only uniformly color all kinds of stainless steel, but also the coloring time does not exceed 15 minutes, and the electrolysis process is stable and easy to control.

Description

technical field [0001] The invention relates to a stainless steel electrochemical coloring liquid, in particular to an electrochemical coloring liquid with good permeability and a coloring method using the coloring liquid. Background technique [0002] Stainless steel surface coloring technology is becoming more and more mature, and there are more and more stainless steel coloring methods, among which the INCO method is the most widely used, that is, the chemical coloring method using chromic anhydride and sulfuric acid solution. The main point of the traditional INCO method is to heat the stainless steel in a strong oxidizing bath to form an oxide film of a certain thickness on the surface. In response to the improvement of the INCO method, subsequent researchers proposed the "controlled potential difference method", that is, to control the potential of the sample surface, and to control the coloring of stainless steel by changing the surface potential of the sample to pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/34
Inventor 李超林
Owner 辽宁诚德新材料有限公司
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