▎ 摘　　要

NOVELTY - The utility model claims an aging-resistant zinc-nickel alloy silane chromium-free passivation coating structure, comprising an aluminium alloy substrate, and a chemical deposition zinc layer, a chemical nickel plating layer, a zinc-nickel alloy plating layer, a silane chromium-free passivation layer and a graphene sealing layer from inside to outside in turn on the aluminium alloy substrate. The coating structure claimed by the utility model has good corrosion resistance, and overcomes the technical defect of bad aging resistance of silane chromium-free passivation layer.