2024年4月7日发(作者：)

Class 1Non-dyed

Minimum weight 600 mg. / sq. ft.

Class 2Dyed

Minimum weight 2,500 mg. / sq. ft.

Black Oxide Coating

Black oxide is a uniform decorative black coating for ferrous metals. It has only very

limited corrosion protection under mild corrosion conditions.

Black oxide coatings should normally be given a supplementary treatment (i.e. oil

displacement per MIL-C-16173 Grade 3).

MIL-C-13924C RoHS Compliant

No Dimensional Change For moving parts which cannot tolerate the

dimensional change for a more corrosion

resistant finish. For decorative applications and

can be used to decrease light reflection.

Class 1Alkaline oxidizing.

For wrought iron, plain carbon, and low alloy

steels.

Class 3Fused salt oxidizing.

For steels having draw temperatures above

900?F.

Class 4Alkaline oxidizing.

For corrosion resistant steels.

Chemical Films

Chemical film is a coating for aluminum. Color can vary from colorless to golden-iridescent-brown. Coatings shall be

continuous, free from powdery areas, breaks, scratches, etc.

Salt-Spray Test - (unpainted surfaces)

Treatment Aluminum Alloy Exposure

to Salt Spray

Class 1A2024-T3168 Hours Class 36061-T6168 Hours

6063-T6

7074-T6

MIL-C-5541E RoHS Compliant Clear Chem Film Only

No Dimensional Change Used mainly as a base for paint, and where conductivity and corrosion resistance is required. Also

used for touch-up, where rework has removed

anodize. NOTE: Abrasion resistance is poor.

Class 1A For maximum protection against corrosion, painted or