Iridite™

A trade name for a bath concentrate used in the make-up of chromate conversion solution.

Alodine™

A trade name for a bath concentrate used in the make-up of chromate conversion solution.

MIL-DTL-5541

The most popular of the specifications for Chemical Conversion Coatings for aluminum. There are two “Types” and two “Classes” that can be designated. Type I has hexavalent chrome in it and Type II has trivalent chrome. The Class 1A is designed for maximum corrosion protection while the Class 3 is called out in applications where low electrical resistance is the primary function and/or RoHS compliance is required.

Nadcap

Nadcap is the National Aerospace and Defense Contractors Accreditation Program. Nadcap is a global cooperative accreditation program for aerospace engineering, defense, and related industries. This quality initiative is designed to provide superior performance and standardization across all platforms.

Trivalent Chem Film

Meets MIL-DTL-5541, Type II. This conductive conversion coating IS RoHS, ELV, and WEEE compliant. The trivalent system is gaining in popularity.

Hexavalent Chem Film

Meets MIL-DTL-5541, Type I. This conductive conversion coating contains hexavalent chrome which is being phased out due to environmental and health reasons. This is a NON-compliant RoHS coating.

Chemical Conversion Coating

(Chem Film) Meets MIL-DTL-5541, Type I (hexavalent) and II (trivalent). This is a protective chromic conversion film over aluminum that is conductive, enhances corrosion protection and is a good pretreatment for paint.