What is the role of zinc in relation to metal parts?

Zinc plays a crucial role in protecting metal parts from rust and corrosion, primarily through a process known as galvanization. When zinc is applied as a coating, it serves as a sacrificial anode; it corrodes preferentially to the underlying metal, effectively prolonging the lifespan of the metal components. This protective layer prevents moisture and oxygen from reaching the metal beneath, which are the primary contributors to rust formation.

Coating metal parts with zinc is especially important in environments where the materials are exposed to moisture or other corrosive elements, as it enhances durability and reliability. This attribute makes zinc coatings common in construction, automotive, and various manufacturing industries, where maintenance and replacement costs can be significantly reduced by preventing rust and corrosion.