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Chemical Conversion Coating
Chromate Conversion Coatings
MIL-DTL-5541F Type I, Class 1A or 3
Yellow Chromate Conversion (also known as Chemtreat, Chemfilm, Iridite® and Alodine®) is a procedure that chemically applies a protective coating on aluminum through immersion.
The two classes of Chromate Conversion:
Class 1A coatings are thicker and intended to provide better corrosion prevention when left unpainted as well as to improve adhesion of paint finish systems on aluminum alloys.
Class 3 coatings are intended for use as a corrosion preventative film for electrical and electronic applications where lower electrical resistance is needed or required.
The benefits to chemically treating aluminum:
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Good corrosion protection
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Conductive surface
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Good primer for painting
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Adds no weight
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Maintains pre-process dimensions
Clear RoHS Chemical Conversion Coating
MIL-DTL-5541F Type II, Class 1A or 3
Clear RoHS Chemical Conversion Coating (Trivalent) is a procedure that chemically applies a protective coating on aluminum through immersion.
The benefits to chemically treating aluminum:
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Good corrosion protection
-
Conductive surface
-
Good primer for painting
-
Adds no weight
-
Maintains pre-process dimensions
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Hex-Chrome Free
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Environmentally safer alternative
The two classes of Chromate Conversion:
-
Class 1A coatings are thicker and intended to provide better corrosion prevention when left unpainted as well as to improve adhesion of paint finish systems on aluminum alloys.
-
Class 3 coatings are intended for use as a corrosion preventative film for electrical and electronic applications where lower electrical resistance is needed or required.
