• A coating can be applied to protect surfaces and/or improves appearances.
Chrome plating - a reaction with chromic acid leaves a chrome plating on a part
Phosphate plating - a reaction with phosphoric acid leaves a phosphoric coating on a part
Electroplating - thin metal coatings are made by dissolving an anode in an electrolytic solution with an electric current
Hot dip coating - parts are dipped in molten metal and get a new coating
Vacuum deposition (ion plating) - metals are vaporized in a vacuum chamber and these deposit in thin layers on a surface