Iridite is a N.C.P. (non-chrome chemical process) that produces a protective chromate conversion film coating on aluminium and its alloys. The process is RoHS and WEEE compliant.
Application of the Iridite coating can be by dip, brush, swab, or spray. The process produces coatings in shades ranging from clear to dark yellow. The darker the shade of the final coating, the greater the corrosion protection provided to the metal. The yellow coating can be used as a final finish or can be dyed various other colours.
Iridite coating can also act as a base key for paint application and high performance top coats, lacquers, or as a base for rubber bonding.
For high or low frequency electrical work, Iridite coating has a minimal effect on the aluminium’s electrical characteristics when used at lower concentrations.
It is often used as a protective coating for abraded anodized surfaces and to provide an electrical contact.
Once Iridite coated, the aluminium surface can be welded either by shielded arc method or by spot welding.