A galvanized plate is a steel or iron plate that has been coated with a layer of zinc to protect it from corrosion or rusting. This process, known as galvanization, involves dipping the plate in a molten bath of zinc. The zinc forms a protective barrier that prevents oxygen and water from coming into direct contact with the underlying metal. Galvanized plates are commonly used in construction, automotive, and other industries where metal parts are exposed to harsh weather conditions or corrosive substances.