Packaging steel such as Tinplate and TFS or ECCS (Electrolytic chromium/chromium oxide-coated steel) has been growing with its superior performance to fit a can-making process. Since the end of the 20th century the packaging steel is facing a very difficult of time in competition among steel cans, aluminum D&I cans and PET bottles. In order to survive this tough war the packaging steel will has to be innovative with laminated steel to reflect consumer's preference, for example, environmental issues, safety, convenience and cost performance. One of technical key points to put an excellent performance on the packaging steel would be to explore not only amount and composition of coating layer, but a micro-fine structure on finished surface.
