In our daily life, many electronic products and devices like brackets, shells, fittings need plating, such as zinc plating and nickel plating. Zinc plating is mainly used in steel base board, frames, shells and standard workpiece as protective usage, and these workpieces usually require good appearance and high anti-corrosion. Some standard workpieces like screws are mainly applied with chloride bright zinc plating process and dyed in different colors to adapt to different equipments.