镀铝工艺是在类似于热浸镀锌厚钢板的连续生产线上进行生产的，将冷轧薄钢板热浸于铝（镀铝）或硅质量百分数为5%～11%的铝合金（镀铝硅）的金属熔化液体里，获得所需的金属镀层。

The aluminization process is produced on a continuous production line similar to hot dip galvanized thick steel sheet, where the cold rolled thin steel sheet is hot immersed in aluminum (aluminum alloy or silicon) of 5%~11% to obtain the desired metal coating.

镀铝的薄钢板可应用于需要耐热、能热反射或耐腐蚀的，既美观又经济的薄钢板的情况下。铝镀层是通过浸在非合金的熔融铝里而生成的一种较厚（一般为30～50μrn）的镀层。

Aluminized sheet steel can be used to require heat resistance, heat reflection or corrosion resistance, both beautiful and economical sheet steel cases.Aluminum plating is a thick (generally 30 to 50 rn) coating produced by immersion in non-alloy molten aluminum.

♦耐腐蚀性

铝作为薄钢板保护层的价值主要在于其固有的耐腐蚀性,在大部分的环境中铝的长期腐蚀率只有锌的15%～25%。一般来说，铝镀层对于钢基板保护价值取决于其厚度。只要镀层能维持不受损伤，就能提供长期的保护。铝镀层在大部分的环境中特别当裸露在大气中无须提供牺牲阳极的保护。

♦ corrosion resistance

The value of aluminum as a protective layer of thin steel plate mainly lies in its inherent corrosion resistance. In most of the environment, the long-term corrosion rate of aluminum is only 15%~25% of that of zinc.In general, the protection value of aluminum coating for steel substrate depends on its thickness.Long-term protection provides as long as the plating is protected from damage.Aluminum plating in most of the environment especially when exposed in the atmosphere without providing protection from the sacrificial anode.

♦耐热性

镀铝的薄钢板有优异的抗高温氧化性。在表面温度不超过约510℃时，铝镀层能保护钢不受氧化，且其自身也不会发生色变。在510～675℃的温度下，镀层仍能为钢提供保护，但随着铝-铁-硅合金的形成会造成表面发暗。该合金层极为耐热，但由于它与钢有着不同的膨胀系数，故当超过675℃时，镀层就会变脆并发生剥落。

♦ heat resistance

Aluminium-plated sheet sheet has excellent high temperature oxidation resistance.When the surface temperature does not exceed about 510℃, the aluminum coating protects the steel from oxidation and does not change in color itself.The plating still protects the steel at 510 to 675℃, but the surface darkas the aluminum-iron-silicon alloy is formed.The alloy layer is extremely heat resistant, but because it has a different expansion coefficient from steel, the coating becomes brittle and flaoff over 675℃.

♦焊接性

镀铝薄钢板能用电阻焊（点焊或缝焊）进行连接，也可进行金属电弧焊、火花对接焊或乙炔氧焊。在连接前，建议用钢丝刷将油、脂、漆和脏物彻底清除。金属电弧焊和乙炔氧焊还要求使用专门的熔剂。在电阻焊过程中电极上有可能粘上铝，因此电焊极头或焊轮需要更频繁地修磨。同时，其焊接电流密度也应比焊接无镀层钢板更大一些。

♦ weldability

Alumized sheet steel can be connected with resistance welding (spot welding or seam welding), or metal arc welding, spark butt welding or acetylene oxygen welding.Before joining, it is recommended to thoroughly remove oil, fat, paint and dirt with a wire brush.Special fluxes are also required for metal arc welding and acetylene oxygen welding.It is possible to stick aluminum to the electrode during resistance welding, so the electrode head or wheel will need to be worn more frequently.At the same time, the welding current density should also be larger than the welded uncoated steel plate.

镀铝钢板的表面，不仅加工美丽，且有优秀的反射性能，在500℃以下的温度下，具有80%左右的光反射率；红外线下的反射率竟达到95%。因此镀铝板可制成高效的隔热屏障或者在高温应用中的热反射器，通过有效的热反射使炉内温度迅速升高。

The surface of aluminum steel plate is not only beautiful, but also has excellent reflective performance. At the temperature below 500℃, the light reflectivity is about 80%; the infrared reflectivity reaches 95%.Therefore, the aluminum plating plate can be made into an efficient heat insulation barrier or a heat reflector in high temperature applications, and the temperature in the furnace increases rapidly through the effective heat reflection.