Varies from clear to dark yellow
The application of a clear coat cannot be visually confirmed
Good resistance to corrosion
Chemical film
MIL-DTL-5541
Class 1A
For maximum protection against corrosion
For Surfaces to be painted or left unpainted.
Class 1A chemical film conversion coating is Intended to provide corrosion prevention when Left unpainted and to improve adhesion of paint Finish system aluminium and aluminium alloy
Class 3
Class 3 chemical coating are intended as a corrosion preventive film for electrical and electronic applications where low resistance contacts are required.