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Iridite NCP

Increasing concerns over the health and ecological effects of hexavalent-chromium has inspired the development of alternative approaches and technologies for various coating types.Aluminum Corrosion Protection

At the center of the innovation efforts are companies like MacDermid, whose development of chromate conversion coatings for plated coatings helped seed developments in the field of aluminum treatments.


Specifications and Approvals

  • Qualified under  MIL-DTL-81706 Class 3
  • Bookman
  • Diehl Aerospace
  • Ericsson
  • General Dynamics 10544
  • Knorr-Bremse N12005-P25
  • Motorola
  • Synergie (Wheels)

Would like to know more? Don't hesitate to contact us for further information.


Iridite NCPAdvantages

Until now, most non-chrome conversion coatings have been based on a combination of organic polymers and fluoride compounds.  While these types of products have excellent paint adhesion characteristics, in most cases, they have no corrosion resistance properties.

Based on that deficiency, MacDermid have developed a product range that has shown to be both safe and effective as a true replacement for the hexavalent-chrome systems…Iridite NCP.

Iridite NCP provides both high adhesion values for paints and powder coatings as well as excellent  corrosion resistance in its own right. This means that even unpainted areas of aluminum are protected against corrosion.


Meets environmental directives

Iridite NCP is the safe, reliable and cost effective alternative to chromate based pre-treatments for aluminum and has been developed in response to the ELV, RoHS and WEEE directives.

Iridite NCP does not contain Lead, Cadmium, Chromium(hexavalent or trivalent), Mercury or PBB / PBDE  compounds.




The coating exhibits bare, unpainted, corrosion resistance that is equal to hexavalent chromates on many  aluminium alloys. The coating can be used as a final finish and can also serve as a base for paints, high performance topcoats, powder paints, lacquers, or as a base for rubber bonding.



When the application is for a paint base only, then Iridite EXD may be considered.