Preparation method of Ni-SiC compound coating on surface of aluminum alloy and electroplating solution thereof
A technology of aluminum alloy surface and composite coating, which is applied in the direction of metal material coating process, coating, electrolytic coating, etc., can solve the problems of uneven distribution of silicon carbide, coarse coating structure, low content of silicon carbide, etc., and achieve silicon carbide dispersion The effect of uniformity, uniform distribution, and high stability of the plating solution
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[0069] The present invention is a kind of preparation method of Ni-SiC composite coating on the surface of aluminum alloy and its electroplating liquid,
[0070] The present invention describes the proposed technical scheme in detail through three embodiments.
[0071] The preparation process of the Ni-SiC composite coating on the surface of the aluminum alloy is as follows:
[0072] Step 1: Mechanical leveling. 240 # ~1500 # Sandpaper is used to grind the test piece in turn to remove the aluminum alloy surface covering. Rinse with deionized water for 2 minutes.
[0073] Step 2: Degreasing with hot lye and degreasing with acetone. After the aluminum alloy parts are machined, there will always be various greases, such as engine oil, diesel oil, lubricating oil, anti-rust oil, etc., and the combination of alkaline degreasing and organic solvent degreasing is used to remove the grease on the aluminum alloy surface of the parts. 3g / LNaOH, 30g / LNa 2 CO 3 , 30g / LNa 3 PO 4 ...
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