ts include electrolytic tinplate, electrolytic chromium coated steel (also referred to as tin free steel or TFS), and black plate (the uncoated steel). Tinplate is a thin steel sheet coated by tin, while TFS is an electrolytic chrome plated steel consisting of a thin layer of chromium and a layer of chromium oxide deposited on the steel base. Both of them have a beautiful, metllic luster as well as excellent properties in corrosion resistance and paint-ability.3. Features of Electrolytic Tinplat