Coatings:

PTFE, teflon, stand-cote, etc… The resulting surfaces are even and the added coatings have thicknesses between 5 and 30 microns.

Main properties:

Low friction, resistance to fretting, atmospheric corrosion, sattern fog and chemical agents. Usable at temperatures between -250ºC and +280ºC. Self-lubrificating, nonadherent.

Surface treatment:

Hard chromium
Nickel
Manganese phosphatization
Zinc-plating
Olive – green bichromium – plating
Yellow bichromium – plating
Zinc Lamellar…