Chemical Conversion Coating

Chemical Conversion Coating
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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:

  • Good corrosion protection
  • Conductive surface
  • Good primer for painting
  • Adds no weight
  • Maintains pre-process dimensions

Clear RoHS Chemical Conversion Coating

Chemical Conversion Coating
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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:

  • Good corrosion protection
  • Conductive surface
  • Good primer for painting
  • Adds no weight
  • Maintains pre-process dimensions
  • Hex-Chrome Free
  • 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.

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