Chem Film -
Coatings for aluminum. Color can vary from colorless to golden - iridescent -brown. Materials should conform to Mil - C - 81706. Coatings shall be continuous, free from powdery areas, breaks, scratches, etc.
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Specification
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Thickness
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Comments
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MIL-C-5541E
superseded by MIL-DTL-5541F
MIL-DTL-81706
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Class 1A
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Class 1A is used as a corrosion preventative film (if unpainted) or to improve adhesion of paint finish systems (if painted).
Class 3 is used as a corrosion preventative
film for electrical and electronic applications, where low resistance contacts are required.
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Class 3
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MIL-DTL-5541F
MIL-DTL-81706
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Type I
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Compositions containing hexavalent chromium |
| Type II |
Compositions containing no hexavalent chromium
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AMS-C-5541
NG-PS80500KA(Rev. L, class 1A) |
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ASTM B449
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