Chicago Plating, Inc.
(630)718-1600 Fax: (630)718-1690
P.O. Box 164 Naperville IL. 60566
Bill Crawford, President


Mil-C-5541, 7.3.1of Mil-STD 171


Chromates are a conversion coating used to passivate Aluminum, Zinc and Cadmium plating. They coat the surface and slow down corrosion of the underlying metal. Clear coatings names include Irridite, chemical film and clear chromate. The yellow chromates are referred to as dichromate, yellow dichromate, or just yellow. The historic formulations of yellow chromate contained hexavalent Chrome so they were not RoHS compliant.