How does the inclusion of zinc in galvanized coatings protect metal chairs from rust?

Galvanized coatings play a crucial role in protecting metal chairs from rust by incorporating zinc as a primary barrier against corrosion. When metal chairs are coated with zinc through the galvanization process, the zinc acts as a sacrificial layer. Even if the coating is scratched or damaged, the zinc oxidizes preferentially to the underlying steel or iron, preventing rust from forming. Additionally, zinc creates a protective patina when exposed to moisture, further shielding the metal. This electrochemical process, known as cathodic protection, ensures long-term durability and resistance to environmental factors, making galvanized metal chairs ideal for both indoor and outdoor use. The inclusion of zinc not only enhances the lifespan of the furniture but also reduces maintenance costs, providing a cost-effective solution for rust prevention.