Bonderizing is a process of coating a metal with a protective material. Automakers and other manufacturers use this process mainly on iron, steel, aluminum, or zinc. Bonderizing begins by spraying the metal with a hot solution of a phosphate (a chemical containing phosphorus) or by dipping the metal in this solution. A chemical reaction then changes the surface materials into an insoluble phosphate such as iron phosphate. Bonderizing prevents rust and corrosion (destruction by chemical action) and helps paint or lacquer stick to metals.
