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.