Standard Specification for Phosphate/Oil Corrosion Protective Coatings for Fasteners
NORM herausgegeben am 1.5.2025
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Designation standards: ASTM F1137/F1137M-25
Publication date standards: 1.5.2025
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: American technical standard
Kategorie: Technische Normen ASTM
This specification covers the basic physical requirements and test methods for phosphate/oil and phosphate/organic corrosion protective coatings for fasteners such as nuts, clips, washers, and other ferrous threaded and non-threaded fasteners that require corrosion protection. The zinc phosphate treatment and subsequent protective coatings are classified into seven grades according to the following requirements: Grade 0A consists of a zinc phosphate coating with no additional sealer (dry); Grade 0B consists of a zinc phosphate coating with a dry organic sealer; Grades 0C, 0D, and I consist of a zinc phosphate coating with supplemental protective oil type compound; and Grades II and III consist of a zinc phosphate with a supplemental zinc-rich epoxy resin coating (with the addition of a clear organic topcoat for Grade II). These coatings may or may not have a decorative finish. The coatings shall meet the requirements specified for appearance, adhesion, corrosion resistance, coating flexibility, thread fit, and dry-to-touch characteristics. In addition, they shall also undergo humidity and coating thickness tests.
Keywords:
coating, corrosion, fasteners, protection, phosphate, resistance, rust,, ICS Number Code 21.060.01 (Fasteners in general),25.220.60 (Organic coatings)