Clear Chemical Conversion Coating

MIL-DTL-5541F Type II, Class 1A or 3

Clear Chemical Conversion Coating 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.