Galvanization is a process used to protect metal from rust and corrosion. It involves coating the metal, often steel, with a layer of zinc. This layer acts as a barrier, preventing moisture and air from reaching the underlying metal. If the coating gets scratched, the zinc still protects the steel by corroding first, which is known as sacrificial protection. This technique is commonly used in various applications, such as in the construction of bridges, fences, and roofs. By using galvanization, these structures can last much longer, reducing the need for frequent repairs and replacements, ultimately saving time and money.