Stainless steel is a type of metal that does not easily stain, rust or corrode. Stainless appliances are those made from this material and designed to resist stains, rust and corrosion. These appliances include refrigerators, ovens, cooktops, dishwashers, microwaves, etc., that have a surface of stainless steel or are encased in it. They are popular for their durability, ease of maintenance, and sleek appearance.