The application relates to the technical field of
metal corrosion prevention, and particularly discloses a high-
corrosion-resistance
zinc-aluminum-
magnesium alloy plated plate and a continuous hot plating process. The
zinc-aluminum-
magnesium alloy plated layer comprises the following components in percentage by
mass: Al: 1.8-2.5 wt%, Mg: 1.0-2.0 wt%, B: 0.001-0.005 wt%, Sn: 0.03-0.08 wt%, and the rest is Zn. The preparation method comprises the following steps: S1, pre-oxidation treatment: performing controlled pre-oxidation treatment on a cold-rolled steel plate after reduction annealing to obtain an oxidized base plate; S2, incomplete
reduction treatment; S3, plating solution preparation and melting; S4, hot dipping and plating layer adhesion; and S5, low-temperature
temperature control and cooling winding. The plate can be used for outdoor high-
humidity environment components such as buildings, automobiles and household appliances, and has the advantages of simultaneously improving notch
corrosion resistance, plane corrosion resistance and bending adhesion.