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Method for preparing micro-arc oxidation film with photocatalysis function

A technology of micro-arc oxidation and photocatalysis, which is applied in the field of surface treatment, can solve the problems of poor adhesion of TiO2, and achieve the effect of avoiding pre-treatment and post-treatment processes, uniform thickness and good corrosion resistance

Active Publication Date: 2014-01-22
BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
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Problems solved by technology

TiO 2 It is often loaded on substrates such as glass and ceramics. Glass has good light permeability, which is easy to design into photoreactors with complex shapes, and is cheap and easy to obtain. However, because the surface of glass is very smooth and flat, its effect on TiO 2 The adhesion performance is relatively poor

Method used

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Embodiment Construction

[0015] The method for preparing the micro-arc oxidation film layer with photocatalytic function provided by the present invention is specifically realized through the following steps:

[0016] The first step is the pretreatment of the matrix alloy.

[0017] Pretreatment generally refers to grinding, alkali washing, pickling. For the machining and die-casting surfaces of workpieces, only alkali cleaning and pickling can be carried out; for workpieces with sand mold casting surfaces, the surface sand grains should be removed by mechanical means, and then alkali cleaning and pickling should be carried out; and for flat workpieces, After sanding with water sandpaper, alkali cleaning and pickling are carried out.

[0018] The specific preprocessing steps are:

[0019] a. Mechanical pretreatment: Use sandblasting or sandpaper to polish the sample to remove burrs and surface oxides.

[0020] b. Alkali washing: the composition of the alkaline washing liquid is NaOH15g / L; 2 CO 3 1...

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Abstract

The invention belongs to the field of surface treatment technologies, and particularly relates to a method for preparing a micro-arc oxidation film with a photocatalysis function. The method comprises steps of performing pretreatment, water scrubbing, configuration of micro-arc oxidation tank liquor, micro-arc oxidation, water scrubbing and the like on a matrix. By adopting the method, the film with the photocatalysis function can be directly prepared on the surface of a light alloy through a micro-arc oxidization method. The method has simple technologies, and avoids complex pretreatment and aftertreatment processes. The prepared film can be firmly combined with the matrix and has the photocatalysis function.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and in particular relates to a preparation method of a micro-arc oxidation film layer with photocatalytic function. Background technique [0002] Since the 1970s, Professor Akira Fujishima of the University of Tokyo and Honda and others discovered TiO 2 Since single crystal electrode photo-splitting water, TiO 2 The research and application development of photocatalytic properties and semiconductor heterogeneous photocatalytic reactions have been extensively carried out. Due to TiO 2 With the advantages of high activity, strong photocatalytic effect, chemical and photocorrosion resistance, stable properties, non-toxic, and environmentally friendly, it has become a research hotspot in the field of photocatalytic materials. TiO 2 Photocatalysts need to have a certain practical form, and generally adopt two methods: suspension method and immobilization method. Although the former meth...

Claims

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Application Information

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IPC IPC(8): C25D11/02C25D11/30
Inventor 毕荣荣汤宏才
Owner BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
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