Coating patent: aluminum alloy surface passivation coating and its preparation method

Coating patent: aluminum alloy surface passivation coating and its preparation method

[China Aluminum Industry Network] title of the invention - aluminum alloy surface passivation coating and its preparation method

The invention relates to a metal surface coating and a preparation method thereof, in particular to an aluminum alloy surface passivation coating and a preparation method thereof. The following raw materials are prepared according to the parts by mass: -2-ethylhexyl acrylate 5-40 Parts, 0.5 to 1.2 parts of sulfonated oil, 0.2 to 0.8 parts of polydimethylsiloxane, 0.6 to 1.2 parts of polyethylene glycol, 0.5 to 1 part of propylene glycol butyl ether, 0.05 to 1.2 parts of phosphinecarboxylic acid, anhydrous ethanol 4 to 6 parts, 47 to 89 parts of deionized water, and 0.01 to 1 parts of phenol ethoxylated polyoxyethylene ether, which are applied to the surface of an aluminum alloy and dried to form a passivation coating having corrosion resistance and adhesion. The layer does not contain ingredients that pollute the environment.

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