Hot dip casting aluminum alloy containing Al-Zn-Si-Mg-RE-Ti-Ni and production method thereof

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The present invention relates to a hot dip casting aluminum alloy used for anticorrosion treatment of engineering part resistance to marine climate and a production method thereof. The casting aluminum alloy consists of Al, Zn, Si, Mg, RE, Ti, Ni and nano-oxide particles reinforcing agent. The nano-oxide particles reinforcing agent is selected from TiO and /or CeO. The constituents of the alloy in mass percent are 35-58% Zn, 0.3-4.0% Si, 0.1-5.0% Mg, 0.02-1.0% RE, 0.01-0.5% Ti, 0.1-3.0% Ni, 0.01-1.0% nano-oxide particles reinforcing agent, and the balance of aluminum and unavoidable impurities. The casting aluminum alloy in the present invention is used for coating, which makes the engineering part have corrosion resistance property and erosion resistance and anti-scouring property under the condition of marine climate.