What metal is used in building construction primarily as a coating to protect metal parts from rust and corrosion?

Zinc is widely used in building construction primarily as a coating to protect metal components from rust and corrosion through a process known as galvanization. When steel or iron is coated with zinc, the zinc acts as a sacrificial anode, meaning it corrodes preferentially and protects the underlying metal from environmental factors that can lead to rust.

This protective quality is essential in various construction applications, especially in areas exposed to moisture and harsh weather conditions. The application of zinc can extend the lifespan of metal structures and reduce maintenance costs, making it a valuable material in construction and building practices.

While tin also serves as a coating to prevent corrosion, it is less commonly used compared to zinc. Manganese is mainly used as an alloying element to improve the strength and toughness of steel, and sodium does not serve a protective role in this context; it is primarily involved in chemical processes rather than as a protective coating.