CORROSION RESISTANT ALLOY MATERIAL, COATING WITH SAID MATERIAL AND PART WITH SAID COATING

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An alloy material comprises (in mass%) 5-7% of Al, 2.5-3.5% of Mg, 0.03-0.5% of rear earth，trace impurities and balance of Zn. A corrosion resistant coating with said alloy material and a part with said coating. Said coating has good corrosion resistance and processability.