Galvanizing is the process of applying a protective zinc coating to steel or iron to prevent rusting and corrosion. This is typically achieved through hot-dip galvanizing, where the metal is submerged in molten zinc, or by electroplating. The zinc acts as a sacrificial barrier, corroding preferentially to the underlying metal. Galvanizing is commonly used in construction, automotive, and outdoor applications to enhance durability and extend the lifespan of metal products.