Plating layer structure of aluminium alloy plating zinc - nickel alloy and passivation of no chromium

The utility model discloses a plating layer structure of aluminium alloy plating zinc - nickel alloy and passivation of no chromium, include and soak the zinc layer at the chemistry of aluminum alloy matrix surface the chemistry soaks the pyrophosphate copper plate on the zinc layer zinc - nickel alloy cladding material on the pyrophosphate copper plate no chromium passivation layer on zinc - nickel alloy cladding material. The utility model provides a plating layer structure of aluminium alloy plating zinc - nickel alloy and passivation of no chromium carries out neutral salt atmosphere test 240h according to 1997 " artificial atmosphere corrosion test salt atmosphere test " of GBT10125 -, and the cladding material surface nos white corrosion product generate, is higher than standard QJ453 -1988 " cadmium plating layer technical conditions " the 96h of ministry of astronautics industry neutrality salt atmosphere test's requirement. Replace traditional cadmium plating layer with this kind of plating layer structure, can overcome the shortcoming of cadmium plating technology high toxicity, promote environment friendly society's construction.