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  • What is Iridite® or Alodine®?

    There is often a lot of confusion around these terms and for good reason because by themselves they do not alone define a coating or process. Decades ago they were synonymous with yellow, hexavalent chromate conversion coating of aluminum as MacDermid’s Iridite® 14-2 and Henkel’s Alodine® 1200 products were the leading products used to apply the coating. These yellow chromate conversion coatings, also known as chemical film, provide corrosion protection and act as an adhesion promoter for paint…

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