Hot-dip galvanization

（重定向自Galvanised steel）

Crystalline surface of a hot-dip galvanized handrail.

A street lamp in Singapore showing the characteristic spangle.

Hot-dip galvanization is a form of galvanization. It is the process of coating iron and steel with a layer of zinc by immersing the metal in a bath of molten zinc at a temperature of around 840 °F (449 °C). When exposed to the atmosphere, the pure zinc (Zn) reacts with oxygen (O₂) to form zinc oxide (ZnO), which further reacts with carbon dioxide (CO₂) to form zinc carbonate (ZnCO₃), a usually dull grey, fairly strong material that protects the steel underneath from further corrosion in many circumstances. Galvanized steel is widely used in applications where corrosion resistance is needed without the cost of stainless steel, and can be identified by the crystallization patterning on the surface (often called a "spangle").

单词	Galvanised steel
释义	Galvanised steel 原声例句经济学人 Business Capital would be destroyed: once molten zinc used to galvanise steel solidifies in its vast tanks, it would be too costly to melt again. 资本将被摧毁：一旦用于镀锌钢的熔融锌在其巨大的罐中凝固，再次熔化的成本太高。英语百科 Hot-dip galvanization （重定向自Galvanised steel） Hot-dip galvanization is a form of galvanization. It is the process of coating iron and steel with a layer of zinc by immersing the metal in a bath of molten zinc at a temperature of around 840 °F (449 °C). When exposed to the atmosphere, the pure zinc (Zn) reacts with oxygen (O₂) to form zinc oxide (ZnO), which further reacts with carbon dioxide (CO₂) to form zinc carbonate (ZnCO₃), a usually dull grey, fairly strong material that protects the steel underneath from further corrosion in many circumstances. Galvanized steel is widely used in applications where corrosion resistance is needed without the cost of stainless steel, and can be identified by the crystallization patterning on the surface (often called a "spangle").
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