The invention relates to hot-dip cast aluminum
alloy for anticorrosion treatment on
engineering parts resistant to marine climate and a preparation method thereof, wherein said cast aluminum
alloy contains Al, Zn, Si, Mg, RE, Ti, Ni and nanometer
oxide particle reinforcing agent, said nanometer
oxide particle reinforcing agent is selected from one or two of TiO2 and CeO2, the
mass percentage of the components is as follows: Zn: 35-58%, Si: 0.3-4.0%, Mg: 0.1-5.0%, RE: 0.02-1.0%, Ti: 0.01-0.5%, Ni: 0.1-3.0%, and the total content of the nanometer
oxide particle reinforcing agent: 0.01-1.0%; and the balance consists of Al and unavoidable impurities. The
coating using cast aluminum
alloy prepared by the invention has sufficient
corrosion resistance and scour resistance in marine climate