Buildings that have a combination of copper and galvanized steel are susceptible to pinholes and corrosion caused by the mobility of ions in the water.
水中离子的移动性会导致水管壁中出现气泡和腐蚀现象这些现象会危害建筑中镀锌结构和铜结构的坚固性。
Galvanized steel
原声例句
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英语百科
Hot-dip galvanization
（重定向自Galvanized steel）
![Crystalline surface of a hot-dip galvanized handrail.](/Images/godic/202501/14/Feuerverzinkte_Oberfläche1146.jpg")
![A street lamp in Singapore showing the characteristic spangle.](/Images/godic/202501/14/Lamppost-singapore1147.jpg")
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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