Preparation method of corrosion-resistant titanium alloy micro-arc oxidation coating

A micro-arc oxidation, titanium alloy technology, applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems of complex process and unenvironmental protection, and achieve the effect of improving the film forming rate

Inactive Publication Date: 2021-04-16
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: the existing preparation of corrosion-resistant titanium alloy micro-arc oxidation coating requires the use of toxic substances, which is not environmentally friendly, and the process is complicated

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  • Preparation method of corrosion-resistant titanium alloy micro-arc oxidation coating

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[0019] The invention provides a method for preparing a corrosion-resistant titanium alloy micro-arc oxidation coating, comprising the following steps:

[0020] a. Polish and polish the titanium alloy, clean it and dry it with cold air for later use;

[0021] b. Prepare the electrolyte, the content of each component in the electrolyte is: NaOH 1~5g / L, NaOH 2 SiO 3 10~20g / L, Na 3 PO 4 5~15g / L;

[0022] c. putting the titanium alloy treated in step a into the electrolyte solution described in step b as an anode, using stainless steel as a cathode, under the conditions of voltage 400-450V, frequency 400-500Hz, and duty ratio 20-40%, Anodic current is applied to the titanium alloy sample and treated for 5-20 minutes to form a stable micro-arc on the surface, and a micro-arc oxidation coating is prepared.

[0023] Wherein, in the preparation method of the corrosion-resistant titanium alloy micro-arc oxidation coating, the titanium alloy described in step a is a TC-type titani...

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Abstract

The invention belongs to the technical field of iron and steel smelting, and particularly relates to a preparation method of a corrosion-resistant titanium alloy micro-arc oxidation coating. Aiming at the problems that toxic substances need to be used, the environment is not protected and the process is complex when the corrosion-resistant titanium alloy micro-arc oxidation coating is prepared in the prior art, the invention provides the preparation method of the corrosion-resistant titanium alloy micro-arc oxidation coating. The preparation method comprises the following steps of: a, polishing and grinding titanium alloy for later use; b, preparing an electrolyte; c, putting the titanium alloy serving as an anode into the electrolyte; under the conditions that the voltage is 400-450V, the frequency is 400-500Hz and the duty ratio is 20-40%, introducing anode current into a titanium alloy sample, treating for 5-20 minutes, forming a stable micro-arc on the surface of the titanium alloy sample, and thus obtaining the micro-arc oxidation coating. The electrolyte is safe and environmentally friendly, the operation is easy, and the obtained oxidation coating is high in thickness, large in hardness and excellent in performance.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a method for preparing a corrosion-resistant titanium alloy micro-arc oxidation coating. Background technique [0002] Titanium alloys with micro-arc oxidation coatings are widely used in national defense, national economy and daily life. Therefore, the performance requirements of the titanium alloy of the micro-arc oxidation coating are high, not only requiring excellent corrosion resistance and surface appearance quality, but also requiring a certain wear resistance to meet various possible application environments. [0003] At present, the main method for preparing corrosion-resistant titanium alloys is mainly micro-arc oxidation. [0004] For example, patent 2011101790723 discloses a micro-arc oxidation solution of titanium alloy wear-resistant coating and its application. The components and solute concentration of the micro-arc oxidation solution...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
Inventor 尹晶晶徐接旺王亮赟王飞龙余腾义靳阳
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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