ASTM F2833-11(2017)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F2833 −11 (Reapproved 2017)
Standard Specification for
Corrosion Protective Fastener Coatings with Zinc Rich Base
Coat and Aluminum Organic/Inorganic Type
This standard is issued under the fixed designation F2833; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D610 Practice for Evaluating Degree of Rusting on Painted
Steel Surfaces
1.1 This specification covers the basic requirements for
D3359 Test Methods for Rating Adhesion by Tape Test
chromium-free fastener coatings that combine an inorganic
F606/F606M Test Methods for Determining the Mechanical
zinc-rich basecoat with an aluminum-rich topcoat that contains
Properties of Externally and Internally Threaded
an integrated lubricant.
Fasteners, Washers, Direct Tension Indicators, and Rivets
1.2 These coatings are applied by conventional dip-spin,
F1137 Specification for Phosphate/Oil Corrosion Protective
dip-drain, or spray methods to ferrous parts which can be
Coatings for Fasteners
handled through a cleaning, or phosphate, coating, and baking
F1470 Practice for Fastener Sampling for Specified Me-
operation. Phosphating or shot blast is required to clean and
chanical Properties and Performance Inspection
prepare the surface of the steel. These coatings are bake cured
F1624 Test Method for Measurement of Hydrogen Em-
at temperatures up to 500°F.
brittlement Threshold in Steel by the Incremental Step
NOTE1—Ifused,phosphatetobeusedinaccordancewithSpecification
Loading Technique
F1137, grade 0.
F1789 Terminology for F16 Mechanical Fasteners
1.3 Units—The values stated in inch-pound units are to be
F1940 Test Method for Process Control Verification to
regarded as standard. No other units of measurement are
Prevent Hydrogen Embrittlement in Plated or Coated
included in this standard.
Fasteners
1.4 This standard does not purport to address all of the
3. Classification
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1 When the zinc phosphate option is used, its coating
priate safety, health, and environmental practices and deter-
weight shall be in the range of 8-20 g/square meter. If used,
mine the applicability of regulatory limitations prior to use.
phosphate to be used in accordance to Specification F1137
1.5 This international standard was developed in accor-
grade 0.
dance with internationally recognized principles on standard-
3.2 These coatings are classified into 5 different types:
ization established in the Decision on Principles for the
3.2.1 Grade 1—requires a minimum basecoat thickness of
Development of International Standards, Guides and Recom-
0.27 mils applied in one coat. An organic topcoat with an
mendations issued by the World Trade Organization Technical
integrated lubricant is applied at a minimum thickness of 0.20
Barriers to Trade (TBT) Committee.
mils in one coat and ; with no additional layers.
2. Referenced Documents
3.2.2 Grade 2—requires a minimum basecoat thickness of
2.1 ASTM Standards: 0.27 mils applied in two coats bulk or one coat sprayed. An
organic topcoat with an integrated lubricant is applied at a
B117 Practice for Operating Salt Spray (Fog) Apparatus
minimumthicknessof0.20milsinonecoat;withnoadditional
This specification is under the jurisdiction of ASTM Committee F16 on layers.
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
3.2.3 Grade 3—requires a minimum basecoat thickness of
Fasteners.
0.27 mils applied in one coat. This basecoat is dark gray in
Current edition approved Dec. 1, 2017. Published December 2017. Originally
color. A black organic topcoat with an integrated lubricant is
approved 2011. Last previous edition approved in 2011 as F2833–11. DOI:
10.1520/F2833–11R17.
applied at a minimum thickness of 0.20 mils in two coats bulk
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
or one coat sprayed; with no additional layers.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.2.4 Grade 4— requires a minimum basecoat thickness of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 0.27 mils applied in one coat. An inorganic topcoat with an
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F2833 − 11 (2017)
TABLE 1 Coating Properties
Grade Topcoat Total number of Average Coating Average Coating Minimum SST
type coating layers Thickness (mil) Weight (g/m ) hrs
1 Organic 2 0.47–0.59 32–40 840
2 Organic 3 0.47–0.71 32–51 1200
3 Organic/black 3 0.47–0.71 37–41 840
4 Inorganic 2 0.47–0.59 34–41 1000
5 Organic/various colors 2 0.47–0.59 32–39 840
integrated lubricant is applied at a minimum thickness of 0.20 the finished product (after coating) meets all the specified
mils and an inte
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