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Environment-friendly stainless steel electrochemical coloring liquid and coloring method

A stainless steel, electrochemical technology, applied in the field of green and environmentally friendly electrochemical coloring liquid, can solve the problems of environmental impact, weak bonding between the film layer and the substrate, etc., achieve uniform coloring, improve the stability of the color film, and reduce the energy barrier Effect

Active Publication Date: 2016-02-03
SHANGHAI LINKCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Through years of continuous research and development, the INCO method has become very mature, but there is still the problem that the formed film layer is not strongly bonded to the substrate. More importantly, the INCO method and its derivative methods need to use a large amount of high-concentration chromium-containing Coloring liquid, after use, the treatment of these coloring liquid wastes will have a very large impact on the environment. At the same time, the highly toxic and strongly acidic environment in the production process is also a great challenge to the operation process.

Method used

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  • Environment-friendly stainless steel electrochemical coloring liquid and coloring method
  • Environment-friendly stainless steel electrochemical coloring liquid and coloring method
  • Environment-friendly stainless steel electrochemical coloring liquid and coloring method

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Embodiment Construction

[0023] The content of the present invention is further described below by way of examples.

[0024] Adopt 430 stainless steel test pieces as the colored stainless steel sample piece in the embodiment.

[0025] 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.

[0026] The surface activation process is: 10% HCl, 5% H in mass percentage 2 SO 4 Soak in aqueous solution for 5 minutes at room temperature.

[0027] The second step: carry out electrochemical coloring, place the pretreated ...

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Abstract

The invention discloses stainless steel electrochemical coloring liquid. Water is adopted as a solvent. The coloring liquid is characterized by being prepared from, 115-140 g / L of sodium hydroxide, 50-90 g / L of sodium molybdate, 18-22 g / L of antimony nitrate, 15-32 g / L of cerous nitrate, 23-45 g / L of sodium tungstate and 3-6 g / L of a nonionic surfactant. The stainless steel coloring liquid is free of toxicity and harm to operating environment, and stainless steel can be effectively and evenly colored.

Description

technical field [0001] The invention relates to a stainless steel electrochemical coloring liquid, in particular to a green and environment-friendly electrochemical coloring liquid and a coloring method using the coloring liquid. Background technique [0002] The surface coloring technology of stainless steel is very mature, and the commonly used existing technologies include ion deposition oxide or oxide method, high temperature oxidation method, chemical oxidation method, electrochemical oxidation method, gas phase cracking method, etc. The ion deposition oxide or oxide method is to place the stainless steel workpiece in a vacuum coating machine for vacuum evaporation coating. This method has large investment and high cost, and is suitable for mass product processing. The high-temperature oxidation method is to enter the stainless steel workpiece in a specific molten salt, so that an oxide film of a certain thickness is formed on the surface of the stainless steel workpiec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
Inventor 李超林
Owner SHANGHAI LINKCHEM TECH CO LTD