Black Oxide

The commercial application of black conversion coatings to iron, steel, and cast iron is a process that gives your product important characteristics:

It produces an attractive black finish that enhances the salability of the coated pieces.
It offers an economical means of imparting moderate corrosion resistance to the coated pieces.
It yields a finish that, when properly sealed, resists galling and enhances lubricity.
Its application is economical as far as cost per square foot.