ASTM F1136/F1136M-11
(Specification)Standard Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners
Standard Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners
ABSTRACT
This specification covers the basic requirements and associated test methods for water-based corrosion protective zinc/aluminum dispersion inorganic basecoats, and optional sealers and topcoats for fasteners. The basecoat can contain chrome (C) or be non-chrome (NC). These coatings are applied to ferrous parts by conventional dip-spin, dip-drain, or spray methods, which can be handled through a cleaning, coating, and baking operation, and which are not adversely affected by baking temperatures up to 626 °F. The coatings are classified into six grades (Grades 1 to 6) according to the required minimum basecoat thickness, and when tested, shall conform accordingly to appearance, adhesion, corrosion resistance, blister, thread fit, and hydrogen embrittlement requirements. The coating process does not induce the possibility of internal hydrogen embrittlement provided that the fasteners have not been cleaned or pre-treated with an acid or phosphate. Alkaline cleaning or vapor degreasing is required along with shot blasting to remove rust or scale. No metric equivalents are presented in this specification.
SCOPE
1.1 This specification covers the basic requirements for water-based zinc/aluminum dispersion inorganic basecoats and optional sealers and topcoats for fasteners. The basecoat can contain chrome (C) or be non-chrome (NC).
1.2 These coatings are applied by conventional dip-spin, dip-drain, or spray methods to ferrous parts which can be handled through a cleaning, coating, and baking operation, and which are not adversely affected by baking temperatures up to 626°F.
1.3 The coating process does not induce the possibility of internal hydrogen embrittlement providing that the fasteners have not been cleaned or pre-treated with an acid or phosphate. Alkaline cleaning or vapor degreasing is required along with shot blasting to remove rust or scale.
1.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:F1136–10 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*
1.1 This specification covers the basic requirements for water-based zinc/aluminum dispersion inorganic basecoats and optional
sealers and topcoats for fasteners. The basecoat can contain chrome (C) or be non-chrome (NC).
1.2 These coatings are applied by conventional dip-spin, dip-drain, or spray methods to ferrous parts which can be handled
through a cleaning, coating, and baking operation, and which are not adversely affected by baking temperatures up to 330°C
[626°F].
1.3 The coating process does not induce the possibility of internal hydrogen embrittlement providing that the fasteners have not
been cleaned or pre-treated with an acid or phosphate.Alkaline cleaning or vapor degreasing is required along with shot blasting
to remove rust or scale.
1.4The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this
standard.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
B117 Practice for Operating Salt Spray (Fog) Apparatus
D610 Practice for Evaluating Degree of Rusting on Painted Steel Surfaces
D3359 Test Methods for Measuring Adhesion by Tape Test
F606 TestMethodsforDeterminingtheMechanicalPropertiesofExternallyandInternallyThreadedFasteners,Washers,Direct
Tension Indicators, and Rivets
F1624606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners,
Washers, and Rivets (Metric)
F1624 Test Method for Measurement of Hydrogen Embrittlement Threshold in Steel by the Incremental Step Loading
Technique
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F1624 Test Method for Measurement of Hydrogen Embrittlement Threshold in Steel by the Incremental Step Loading
Technique
F1789 Terminology for F16 Mechanical Fasteners
F1940 Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated Fasteners
3. Classification
3.1 These coatings are classified into six grades according to the requirements in Table 1.
3.1.1Grade 1 requires a minimum basecoat thickness of 0.16 mil (0.052 oz/ft
2
2
3.1.1 Grade 1 requires a minimum basecoat thickness of 4µm [ 16g/m ] or 0.16 mil (0.052 oz/ft ).This is usually applied in two
1
This specification is under the jurisdiction of ASTM Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on Fasteners.
Current edition approved Dec.Nov. 1, 2010.2011. Published JanuaryDecember 2011. Originally approved in 1988. Last previous edition approved in 20042010 as
F1136–04.F1136–10. DOI: 10.1520/F1136_F1136M-101.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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F1136/F1136M – 11
TABLE 1 Coating Classification
Minimum
Coating Thickness Coating Weight SSThickness
Hours (h)
Grade
Topcoat Type
No.
Metric CoatiIngch Metric Inimumch
Average WAveiraghte Average SSTAverage (C) (NC)
2 2
(mil) (mil) (ozg/ftm )Mi Hours(hoz/ft )
1 None 0.16 to 0.20 0.052 to 0.066 240 ----
1 None 4to5 0.16 to 0.20 16 to 20 0.052 to 0.066 240 ----
2 None 0.20 to 0
...
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