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A kind of preparation method of magnesium alloy anti-corrosion composite film

A magnesium alloy, anti-corrosion technology, applied in anti-corrosion coatings, metal material coating processes, coatings, etc., can solve the problems of poor corrosion resistance and composite ability of chemical conversion coatings, and improve the overall adhesion and compactness. Avoid the effects of loose pores, poor adhesion and strong adsorption

Active Publication Date: 2019-11-26
温岭市合丰鞋材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a method for preparing a magnesium alloy anti-corrosion composite film, which solves the problems of poor corrosion resistance and composite ability of the existing chemical conversion film

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  • A kind of preparation method of magnesium alloy anti-corrosion composite film

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Embodiment 1

[0022] Preferred Embodiment 1 of the present invention provides a method for preparing a magnesium alloy anti-corrosion composite film, comprising the following steps:

[0023] Step 1, the magnesium alloy block is sequentially polished with 300 mesh, 800 mesh, and 1200 mesh sandpaper, and then put into deionized water and absolute ethanol in turn, and ultrasonic cleaning is performed respectively, and the ultrasonic cleaning time is 15 minutes;

[0024] Step 2: Spray a pretreatment liquid on the surface of the magnesium alloy block treated in step 1. The amount of pretreatment liquid sprayed is an average of 2.5 g per square centimeter of the surface of the magnesium alloy block. After spraying, leave it at room temperature for 12 minutes. The pretreatment solution is composed of the following components in weight percentage: 1.2% potassium phosphate, 3.5% sodium acetate, 1.5% sodium orthosilicate, and the rest is deionized water;

[0025] Step 3: Place the magnesium alloy blo...

Embodiment 2

[0031] Preferred embodiment 2 of the present invention provides a method for preparing a magnesium alloy anti-corrosion composite film, comprising the following steps:

[0032] Step 1, the magnesium alloy block is sequentially polished with 300-mesh, 800-mesh, and 1200-mesh sandpaper, and then put into deionized water and absolute ethanol in turn, and ultrasonic cleaning is performed respectively, and the ultrasonic cleaning time is 20 minutes;

[0033] Step 2: Spray a pretreatment liquid on the surface of the magnesium alloy block treated in step 1. The amount of the pretreatment liquid sprayed is 3g per square centimeter on the surface of the magnesium alloy block. After the spraying, let stand at room temperature for 15 minutes. The pretreatment solution is composed of the following components in weight percentage: 1.5% potassium phosphate, 4% sodium acetate, 1.8% sodium orthosilicate, and the rest is deionized water;

[0034] Step 3: Place the magnesium alloy block treated...

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Abstract

The invention provides a magnesium alloy anti-corrosion complex film preparation method. The magnesium alloy anti-corrosion complex film preparation method includes the steps that grinding is carriedout, and cleaning is carried out; pre-processing solution is processed; chemical conversion processing solution is processed, and the ultrasonic concussion is carried out with mechanical stirring simultaneously in the processing process; drying is carried out; etching liquids are adopted for etching; a beautify is adopted for decoration; and complex liquid is adopted for coating. An anti-corrosionfilm layer prepared according to the magnesium alloy anti-corrosion complex film preparation method is high in film layer adhesive force and especially in the adhesive force between the outer layer organic layer and the inner layer chemical conversion processing layer, surface cracks on the surface of the chemical conversion processing layer after being etched and decorated can be fine permeatedand filled by the organic coating, the entire anti-corrosion performance of a film layer is better while the outer layer film layer adhesive force is improved, and superexcellent anti-corrosion protection for a magnesium alloy substrate can be provided under the various severe natural environments.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy anticorrosion treatment, in particular to a preparation method of a magnesium alloy anticorrosion film. Background technique [0002] Magnesium alloy is an alloy composed of magnesium and other elements. Its characteristics are: low density (1.8g / cm 3 Magnesium alloy or so), high strength, large elastic modulus, good heat dissipation, good shock absorption, greater impact load capacity than aluminum alloy, and good corrosion resistance to organic substances and alkalis. The main alloying elements are aluminum, zinc, manganese, cerium, thorium and a small amount of zirconium or cadmium. Magnesium-aluminum alloys are currently the most widely used, followed by magnesium-manganese alloys and magnesium-zinc-zirconium alloys. Mainly used in aviation, aerospace, transportation, chemical industry, rocket and other industrial sectors. It is the lightest metal among practical metals. The specif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/18C23C22/76C09D4/02C09D4/06C09D7/63C09D5/08
CPCC09D4/06C09D5/08C23C22/18C23C22/76
Inventor 不公告发明人
Owner 温岭市合丰鞋材有限公司
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