HOT-DIP ALLOY CONTAINING ALUMINIUM, SILICON, ZINC, RARE EARTH, MAGNESIUM, IRON, COPPER, MANGA

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The invention relates to a special hot-dip plating alloy for a coating on the surface of a titanium alloy part, wherein the hot-dip plating alloy contains the following components by mass percentage : 8-24 % of Si, 1.2-3.1 % of Zn, 0.02-0.5 % of RE, 0.5-3.2 % of Mg, 0.05-1 % of Fe, 0.05-0.5 % of Cu, 1.0-2.0 % of Mn, 0.5-2.0 % of Cr, 0.02-0.5 % of Zr, 1-2 % of a nano-oxide particle reinforcing agent and the balance of Al and inevitable impurities, and the nano-oxide particle reinforcing agent is selected from one or two of TiO 2 and CeO 2 . The adoption of the hot-dip plating alloy produced by the invention can form a coating which has corrosion resistance and good wear resistance, and is well metallurgically bonded with a matrix on the surface of the titanium alloy.