Preparation method of metal resin complex and metal resin complex prepared thereby
A metal resin and composite technology, applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., can solve problems such as unfavorable safety production, discoloration and toxicity of aluminum alloy surface
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[0016] The invention provides a method for preparing a metal-resin composite, comprising the following steps:
[0017] S1, anodic oxidation: anodize the pretreated metal substrate to obtain a metal substrate with an anodized film layer on the surface, and the metal substrate is an aluminum alloy substrate or an aluminum substrate; anodization is required by those skilled in the art Known anodic oxidation technology, the present invention preferably can include putting the pretreated metal substrate as an anode into a sulfuric acid or phosphoric acid solution with a concentration of 10wt%-30wt%, electrolyzing 2- 15 minutes to obtain a metal substrate with a 1-20um thick anodized film layer on the surface. The anodized equipment adopts known anodized equipment, such as an anodized tank. Preferably, the thickness of the anodized film layer prepared by anodic oxidation is 1-10um.
[0018] S2, phosphoric acid treatment: immerse the metal substrate containing the anodized film laye...
Embodiment 1
[0043] This example prepares an aluminum alloy resin composite body;
[0044] 1. Pretreatment: Cut the commercially available 1mm thick 6063 aluminum alloy plate into 15mm*80mm rectangular pieces, put it into a polishing machine for grinding, then degrease and clean it, and then oxidize it at 60°C Alkaline etching treatment in a solution with a sodium content of 40g / L for 10s, rinse with water and put in HNO 3 Neutralize in a neutralization tank with a content of about 6wt% for 30s, and then wash with water to obtain a pretreated aluminum alloy sheet;
[0045] 2. Surface treatment 1: Put the above aluminum alloy sheet as an anode into H with a concentration of about 15wt%. 2 SO 4 In the anodizing tank, electrolyze at 15V for 5 minutes at 18°C, and bake at 80°C for 20 minutes;
[0046] 3. Surface treatment 2: prepare 10wt% H in a beaker 3 PO 4500ml of aqueous solution, at room temperature, immerse 10PCS of the above-mentioned aluminum alloy sheet in it, take it out after 2...
Embodiment 2
[0051] Aluminum alloy resin composites A2 and B2 were prepared in the same manner as in Example 1, except that surface treatment 2 was prepared in a beaker containing 10wt% H 3 PO 4 500ml of aqueous solution, at room temperature, immerse 10PCS of the above-mentioned aluminum alloy sheet in it, take it out after 10 minutes, put it in a beaker filled with water and soak it for 2 minutes, then put the aluminum alloy in an oven at 80°C for drying. Using the same method as in Example 1, it was measured that a 5-6um thick loose layer, a 75-100nm thick barrier layer and a 25nm-50um thick corrosion layer were obtained on the surface of the aluminum alloy sheet after electrolysis. The pore diameter of the micropores of the anodized film in the loose layer is 30nm-45um; the pore diameter of the barrier layer corrosion holes in the barrier layer is 30nm-50um; the pore diameter of the aluminum alloy corrosion holes in the corrosion layer is 60nm-200um. It can also be observed that there ...
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