ASTM_F_2833_-_11.pdf

Designation:F283311Standard Specification forCorrosion Protective Fastener Coatings with Zinc Rich BaseCoat and Aluminum Organic/Inorganic Type1This standard is issued under the fixed designation F2833;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the basic requirements forchromium-free fastener coatings that combine an inorganiczinc-rich basecoat with an aluminum-rich topcoat that containsan integrated lubricant.1.2 These coatings are applied by conventional dip-spin,dip-drain,or spray methods to ferrous parts which can behandled through a cleaning,or phosphate,coating,and bakingoperation.Phosphating or shot blast is required to clean andprepare the surface of the steel.These coatings are bake curedat temperatures up to 500F.NOTE1If used,phosphate to be used in accordance with SpecificationF1137,grade 0.1.3 UnitsThe values stated in inch-pound units are to beregarded as standard.No other units of measurement areincluded in this standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray(Fog)ApparatusD610 Practice for Evaluating Degree of Rusting on PaintedSteel SurfacesD3359 Test Methods for Measuring Adhesion by Tape TestF606 Test Methods for Determining the Mechanical Proper-ties of Externally and Internally Threaded Fasteners,Washers,Direct Tension Indicators,and RivetsF606M Test Methods for Determining the Mechanical Prop-erties of Externally and Internally Threaded Fasteners,Washers,and Rivets(Metric)F1137 Specification for Phosphate/Oil Corrosion ProtectiveCoatings for FastenersF1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance InspectionF1624 Test Method for Measurement of Hydrogen Em-brittlement Threshold in Steel by the Incremental StepLoading TechniqueF1789 Terminology for F16 Mechanical FastenersF1940 Test Method for Process Control Verification toPrevent Hydrogen Embrittlement in Plated or CoatedFasteners3.Classification3.1 When the zinc phosphate option is used,its coatingweight shall be in the range of 8-20 g/square meter.If used,phosphate to be used in accordance to Specification F1137grade 0.3.2 These coatings are classified into 5 different types:3.2.1 Grade 1requires a minimum basecoat thickness of0.27 mils applied in one coat.An organic topcoat with anintegrated lubricant is applied at a minimum thickness of 0.20mils in one coat and;with no additional layers.3.2.2 Grade 2requires a minimum basecoat thickness of0.27 mils applied in two coats bulk or one coat sprayed.Anorganic topcoat with an integrated lubricant is applied at aminimum thickness of 0.20 mils in one coat;with no additionallayers.3.2.3 Grade 3requires a minimum basecoat thickness of0.27 mils applied in one coat.This basecoat is dark gray incolor.A black organic topcoat with an integrated lubricant isapplied at a minimum thickness of 0.20 mils in two coats bulkor one coat sprayed;with no additional layers.3.2.4 Grade 4 requires a minimum basecoat thickness of0.27 mils applied in one coat.An inorganic topcoat with anintegrated lubricant is applied at a minimum thickness of 0.20mils and an integrated lubricant in one coat;with no additionallayers.3.2.5 Grade 5requires a minimum basecoat thickness of0.27 mils applied in one coat.An organic pigmented topcoat1This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.03 on Coatings onFasteners.Current edition approved Feb.1,2011.Published February 2011.DOI:10.1520/F283311.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 with an integrated lubricant is applied at a minimum thicknessof 0.20 mils in one coat for additional corrosion protection withno additional layers.4.Ordering Information4.1 Orders for material in accordance with this specificationshall include the following information:4.1.1 Quantity of parts,4.1.2 Color of coating,4.1.3 Grade of coating(see Table 1),4.1.4 Any additions to specifications as agreed upon by thepurchaser and the supplier,and4.1.5 Certification and test report requirements.5.Performance Requirements5.1 AppearanceThe coating shall have a uniform appear-ance free from t