"Rust-resistant" refers to materials or coatings that are designed to prevent or slow down the formation of rust, which is a type of corrosion that occurs when metal reacts with moisture and oxygen. Common rust-resistant materials include stainless steel and galvanized iron, which have protective layers that help keep moisture away from the metal surface. Many products, such as tools, outdoor furniture, and vehicles, are made with rust-resistant features to enhance their durability and lifespan. This is especially important in environments with high humidity or exposure to water, where rust can significantly weaken metal structures and lead to costly repairs or replacements.