A kind of aluminum alloy resin composite body
A technology of aluminum alloy and composite body, applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problem of weak bonding between aluminum alloy and resin
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[0036] The present invention also provides a method for preparing the above-mentioned aluminum alloy resin composite body, comprising the following steps: placing the surface-treated aluminum alloy base material in a mold, and then injecting the resin composition into the mold to combine with the surface-treated aluminum alloy base material , to obtain an aluminum alloy composite body after molding, wherein the surface-treated aluminum alloy substrate is the above-mentioned surface-treated aluminum alloy.
[0037] According to the preparation method of the aluminum alloy resin composite provided by the present invention, the main resin and the polyolefin resin are uniformly mixed to prepare a resin composition. The preparation method of the resin composition adopts the method of physical blending commonly used by those skilled in the art, that is, the main resin and the polyolefin resin are uniformly mixed, extruded and granulated by a twin-screw extruder, and ready for use.
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Embodiment 1
[0043] This example prepares an aluminum alloy resin composite body;
[0044] 1. Pretreatment: Cut the commercially available 1mm thick 5052 aluminum alloy plate into 15mm*80mm rectangular pieces, put it into a polishing machine for grinding, and then wash it with absolute ethanol, and then dip the aluminum alloy substrate in 40g / L sodium hydroxide aqueous solution, after 2min, take it out and rinse it with deionized water to obtain a pretreated aluminum alloy sheet;
[0045] 2. Surface treatment 1: Put the above-mentioned aluminum alloy sheet as an anode into an H2SO4 anodizing tank with a concentration of about 20wt%, electrolyze it at 20V and 18°C for 10min, and dry it;
[0046] 3. Surface treatment 2: prepare 500ml of 10wt% sodium carbonate (pH=12) in a beaker, soak the obtained aluminum alloy sheet in it at 20°C, take it out after 5min, put it into a beaker filled with water and soak for 1min, Cycle like this for 5 times, after the last soaking in water, dry the alumin...
Embodiment 2
[0051] The aluminum alloy resin composite was prepared by the same method as in Example 1, except that the surface treatment 1 was to put the above-mentioned aluminum alloy sheet as an anode into an H2SO4 anodic oxidation tank containing a concentration of about 20 wt%, at a voltage of 15V and at 18°C. Electrolyze for 10min and blow dry. Adopt the same method as claim 1 to record the aluminum oxide film layer with a thickness of 5um on the surface of the aluminum alloy sheet after electrolysis, the aluminum oxide film layer contains nano-micropores with an aperture of 20-40nm, and the hole depth of the nano-micropores is 1um. It is measured that there are corrosion holes with a diameter of 300-1000nm on the surface of the aluminum alloy sheet after soaking, and the depth of the corrosion holes is 4um. It can be observed that there are such as figure 1 The structure shown is similar to the double-layer three-dimensional hollow structure, and there are interconnected structure...
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Abstract
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