Before-coating metal surface treatment method

A surface treatment, pre-metal technology, applied in the direction of metal material coating process, etc., can solve the problems of environmental treatment burden of phosphate, short service life of phosphating solution, and high phosphating temperature, reducing phosphating solution slag and low cost. , The effect of good corrosion resistance

Active Publication Date: 2016-03-02
苏州天成涂装系统股份有限公司
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  • Application Information

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Problems solved by technology

At present, the common problems of domestic phosphating technology are: high phosphating temperature, short service life of phosphating solution, difficult washing and water pollution, which not only bring burden to environmental governance but also consume a lot of water, phosphate and other resources

Method used

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  • Before-coating metal surface treatment method

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Embodiment Construction

[0018] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] Such as figure 1 Shown, a kind of metal surface treatment method of the present invention mainly comprises the following steps:

[0020] Step 1) Degreasing: soak the metal workpiece to be treated in an acetone solution, use an ultrasonic cleaner to clean it for 10-15 minutes, and fully clean the oil stain;

[0021] Step 2) Alkali cleaning: immerse the workpiece to be treated in an alkaline cleaning solution or use an alkaline cleaning solution for spraying;

[0022] Step 3) pickling: the above-mentioned metal workpieces after alkali washing are pickled, and the pickling solution used is 150mL / L of H 2 SO 4 , a mixed solution of 50mL / L HF and 30mL / L triethanolamine, the temperature is controlled at about 25°C, and the pickling time is about 2min; the pickling solution used is 150mL / L H 2 SO 4 , a mixed solution of 50mL / L HF ...

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Abstract

The invention discloses a before-coating metal surface treatment method. The before-coating metal surface treatment method comprises such steps as oil removal, alkali washing, acid washing, two times of water washing and phosphorization. Adopted environment-friendly alkaline cleaning liquid has the technical effects of energy conservation and environmental protection, and has an excellent cleaning effect on both black metal and nonferrous metal; adopted phosphorization liquid has such advantages as quick film formation, strong paint film bonding force, good corrosion resistance, capability of operating through brushing or spraying, simple operation and low cost; the prepared phosphorization liquid reduces phosphorization liquid sediments, and guarantees the quality of phosphorized film; and the film layers are uniform and exquisite, so that the metal surface treatment method can realize the before-coating metal surface treatment more environment-friendly and more efficiently, and has active effects on the coating process and the coating quality.

Description

technical field [0001] The invention relates to a metal surface treatment method before painting, which belongs to the technical field of metal smelting and processing. Background technique [0002] Pre-painting treatment refers to the preparation of the surface of the object before painting, which is the basis of the entire painting process. The quality of the treatment directly affects the quality of the entire painting, so it must be given important attention. During the processing and storage of metal workpieces, especially in the process of machining, they are easily polluted by oil, and the surface is prone to produce adhesions. For example, some workpieces need to be coated with anti-rust oil or anti-rust grease in order to prevent rust during storage. be protected. The existence of oil stains affects the wetting and bonding force of the paint on the metal substrate, so it is necessary to remove the metal material before painting, and perform a proper surface chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/18C23G1/02C23C22/44
CPCC23C22/44C23C22/78C23G1/02C23G1/18
Inventor 董晓娜
Owner 苏州天成涂装系统股份有限公司
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