Tin-zinc alloy plating exhibits a shiny, silver-white appearance, and a uniform spread further brightens the surface. This type of plating is highly resistant to the corrosive effects of salt water and sulfur dioxide, can withstand harsh weather testing, and retains a high level of corrosion resistance even after bending or curling due to stress deformation. Furthermore, this type of plating is highly weldable, and may be safely used with metal sealing parts. Waste material is recyclable, allowing for low environmental pollution, and the operation process is simple and safe.