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锌铝镁镀层钢板作为已广泛应用的热镀锌钢板的升级产品，其是通过在原热镀锌钢板镀层中加入适量的铝和镁元素制成的三元合金高耐蚀钢板。

而采用锌铝镁镀层钢板生产的汽车车身在复杂恶劣的使用环境中具有更长的寿命。目前，锌铝镁镀层（ZM）已经被广泛用于冷成形汽车用钢产品，

除了冷成型用钢板，在热成形钢板上锌铝镁镀层同样具有可行性。锌铝镁镀层钢板不仅具有突出的耐蚀耐摩擦特性，也有很好的兼容性。

从国外主流汽车厂以及首钢的研究结果来看，锌铝镁镀层钢板的点焊特性、激光焊接特性、磷化电泳涂装特性等均与传统镀层差异很小，

生产工艺上没有根本性差异，在可控范围内进行优化即可满足要求，不构成新产品应用方面的陌生感。

Zinc aluminum magnesium coated steel sheet as a widely used upgrade product of hot galvanized steel sheet,

it is made of ternary alloy high corrosion resistant steel sheet made of appropriate amount of aluminum and

magnesium in the original hot galvanized steel sheet. The car body produced by zinc, aluminum and magnesium coated steel plate has

a longer life in the complex and harsh use environment. At present, zinc aluminum magnesium plating (ZM) has been widely used in

cold forming automotive steel products. In addition to cold forming steel plate, zinc aluminum magnesium plating on hot forming steel plate is also feasible.

Zinc aluminum magnesium coated steel plate not only has outstanding corrosion resistance characteristics, but also has good compatibility.

From foreign mainstream automobile factory and shougang research results, zinc aluminum magnesium plating plate spot welding characteristics,

laser welding characteristics, phosphorus electrophoresis coating characteristics and traditional coating difference is very small,

there is no fundamental difference in production process, optimized within the controllable range can meet the requirements,

does not constitute the strangeness of new products.