Skip to main content
About Us Solutions
Markets Quality Systems Sustainability News Events
Contact Us
About Us Solutions
Markets Quality Systems Sustainability News Events
Contact Us
abstract blue background with white dots creating a wave

Conversion Coatings



IRIDITE TCP™ System is a transparent passivation for aluminum based on Chrome-III compounds. It can be applied as post-treatment for pure, alloyed, and cast aluminum and produces a colorless to slightly iridescent protective film. 

Bare corrosion resistance

Passivated layers obtained provide bare, unpainted corrosion resistance values matching hexavalent chromium containing yellow chromate passivates.

Enhanced adhesion

The system is suitable for adhesive and paint applications, providing improved performance and extending the service life of the treated parts.

Operational advantage

Single or double component options are available, enabling better control of the process and enhancing adhesion and corrosion resistance properties.

aluminum heatsink

Features & Benefits

  • Cr(VI)-, lead- and cadmium-free 
  • Exceptionally high corrosion resistance (DIN EN ISO 9227/ASTM B-117)
  • High compatibility with adhesives and paint
  • Low electrical contact resistance
  • No aging or curing required after treatment
  • Meets ELV, RoHS, and WEEE directives
  • Approved by leading OEMs
world in a water droplet


We are committed to delivering safe and sustainable conversion coatings, including the IRIDITE TCP System. Our technologies offer safe, reliable, and future-focused solutions that meet today's regulatory requirements while preparing you for the future.

Get Connected!

Stay up to date on MacDermid Enthone insights, news and events.