LOW-ZINC HOT DIP ALUMINUM ALLOY COATING MATERIAL CONTAINING BE AND COMBINATION OF AGENTS, AND PREPA

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A low-zinc hot dip aluminum alloy coating material containing Be and a combination of agents and a preparation method thereof. The alloy coating material comprises, by weight percent of the elements, Zn of less than 30, Be of 10-4 to 0.05, alloy strengthening agent of 10-4 to 6.0, solvent passivating agent of 10-4 to 1.0, precipitation hardening agent of 10-4 to 0.5, crystal grain size reducing agent of 10-4 to 1.0, rare earth additive of 10-4 to 1.0, and substrate-interface reaction buffer of 0.001 to 2.0, with the remainder being Al and inevitable trace impurities.