ASTM F1136/F1136M-11

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Designation:F1136/F1136M −11
Standard Specification for
Zinc/Aluminum Corrosion Protective Coatings for
1
Fasteners
ThisstandardisissuedunderthefixeddesignationF1136/F1136M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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* D3359 Test Methods for Measuring Adhesion by Tape Test
F606 Test Methods for Determining the Mechanical Proper-
1.1 This specification covers the basic requirements for
ties of Externally and Internally Threaded Fasteners,
water-based zinc/aluminum dispersion inorganic basecoats and
Washers, Direct Tension Indicators, and Rivets
optional sealers and topcoats for fasteners. The basecoat can
F606M Test Methods for Determining the Mechanical Prop-
contain chrome (C) or be non-chrome (NC).
erties of Externally and Internally Threaded Fasteners,
1.2 These coatings are applied by conventional dip-spin,
Washers, and Rivets (Metric)
dip-drain, or spray methods to ferrous parts which can be
F1624 Test Method for Measurement of Hydrogen Em-
handled through a cleaning, coating, and baking operation, and
brittlement Threshold in Steel by the Incremental Step
which are not adversely affected by baking temperatures up to
Loading Technique
330°C [626°F].
F1470 Practice for Fastener Sampling for Specified Me-
chanical Properties and Performance Inspection
1.3 The coating process does not induce the possibility of
internal hydrogen embrittlement providing that the fasteners F1624 Test Method for Measurement of Hydrogen Em-
brittlement Threshold in Steel by the Incremental Step
have not been cleaned or pre-treated with an acid or phosphate.
Alkaline cleaning or vapor degreasing is required along with Loading Technique
F1789 Terminology for F16 Mechanical Fasteners
shot blasting to remove rust or scale.
F1940 Test Method for Process Control Verification to
1.4 The values stated in either SI units or inch-pound units
Prevent Hydrogen Embrittlement in Plated or Coated
are to be regarded separately as standard. The values stated in
Fasteners
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
3. Classification
values from the two systems may result in non-conformance
3.1 Thesecoatingsareclassifiedintosixgradesaccordingto
with the standard.
the requirements in Table 1.
1.5 This standard does not purport to address all of the
3.1.1 Grade 1 requires a minimum basecoat thickness of
2 2
safety concerns, if any, associated with its use. It is the
4µm [ 16g/m ] or 0.16 mil (0.052 oz/ft ). This is usually
responsibility of the user of this standard to establish appro-
applied in two coats to bulk parts, or one coat to racked parts.
priate safety and health practices and determine the applica-
No topcoat is applied in Grade 1.
bility of regulatory limitations prior to use.
3.1.2 Grade 2 requires a minimum basecoat thickness of
2 2
5µm [ 20 g/m ] or 0.20 mil (0.066 oz/ft ). This is usually
2. Referenced Documents
applied in two coats to bulk parts, or one coat to racked parts.
2
2.1 ASTM Standards:
No topcoat is applied in Grade 2.
B117 Practice for Operating Salt Spray (Fog) Apparatus
3.1.3 Grade 3 requires a minimum basecoat thickness of
2 2
D610 Practice for Evaluating Degree of Rusting on Painted
5µm [ 20 g/m ] or 0.20 mil (0.066 oz/ft ) and a single coat of
Steel Surfaces
the clear sealer. The sealer provides additional corrosion
protection and greater lubricity than Grade 2.
1
This specification is under the jurisdiction of ASTM Committee F16 on
3.1.4 Grade 4 requires a minimum basecoat thickness of
2 2
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
8µm [ 28 g/m ] or 0.31 mil (0.092 oz/ft ). This is usually
Fasteners.
applied in three coats to bulk parts, or one to two coats to
Current edition approved Nov. 1, 2011. Published December 2011. Originally
racked parts. No topcoat is applied in Grade 4.
approved in 1988. Last previous edition approved in 2010 as F1136–10. DOI:
10.1520/F1136_F1136M-11.
3.1.5 Grade 5 requires a minimum basecoat thickness of
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 2 2
5µm [ 20 g/m ] or 0.20 mil (0.066 oz/ft ) and a single coat of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
the lubricated sealer. The sealer provides additional corrosion
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. protection than Grade 2 and greater lubricity than Grade 3.
*A Summary of Changes section appears at the end of this standard
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