Historical
ASTM F1137-11e1
Standard Specification for Phosphate/Oil Corrosion Protective Coatings for Fasteners
1.1 This specification covers the basic requirements for four grades of corrosion protection for fasteners. Grade A consists of a zinc phosphate coating with no additional sealer (dry), Grade B consists of a zinc phosphate coating with a dry organic sealer, Grade C, and Grade D consist of a zinc phosphate coating with supplemental protective oil type compound.
1.2 This specification is intended primarily for fasteners such as nuts, clips, washers, and other ferrous threaded and non-threaded fasteners that require corrosion protection.
1.3 These coatings may or may not have a decorative finish.
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ASTM International [astm]
ASTM International [astm]