ASTM F1136-10
(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 – 10
Standard Specification for
Zinc/Aluminum Corrosion Protective Coatings for
1
Fasteners
This standard is issued under the fixed designation F1136; 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* F1624 Test Method for Measurement of Hydrogen Em-
brittlement Threshold in Steel by the Incremental Step
1.1 This specification covers the basic requirements for
Loading Technique
water-based zinc/aluminum dispersion inorganic basecoats and
F1470 Practice for Fastener Sampling for Specified Me-
optional sealers and topcoats for fasteners. The basecoat can
chanical Properties and Performance Inspection
contain chrome (C) or be non-chrome (NC).
F1789 Terminology for F16 Mechanical Fasteners
1.2 These coatings are applied by conventional dip-spin,
F1940 Test Method for Process Control Verification to
dip-drain, or spray methods to ferrous parts which can be
Prevent Hydrogen Embrittlement in Plated or Coated
handled through a cleaning, coating, and baking operation, and
Fasteners
which are not adversely affected by baking temperatures up to
626°F.
3. Classification
1.3 The coating process does not induce the possibility of
3.1 Thesecoatingsareclassifiedintosixgradesaccordingto
internal hydrogen embrittlement providing that the fasteners
the requirements in Table 1.
have not been cleaned or pre-treated with an acid or phosphate.
3.1.1 Grade 1 requires a minimum basecoat thickness of
Alkaline cleaning or vapor degreasing is required along with
2
0.16 mil (0.052 oz/ft ). This is usually applied in two coats to
shot blasting to remove rust or scale.
bulk parts, or one coat to racked parts. No topcoat is applied in
1.4 The values stated in inch-pound units are to be regarded
Grade 1.
as standard. No other units of measurement are included in this
3.1.2 Grade 2 requires a minimum basecoat thickness of
standard.
2
0.20 mil (0.066 oz/ft ). This is usually applied in two coats to
1.5 This standard does not purport to address all of the
bulk parts, or one coat to racked parts. No topcoat is applied in
safety concerns, if any, associated with its use. It is the
Grade 2.
responsibility of the user of this standard to establish appro-
3.1.3 Grade 3 requires a minimum basecoat thickness of
priate safety and health practices and determine the applica-
2
0.20 mil (0.066 oz/ft ) and a single coat of the clear sealer.The
bility of regulatory limitations prior to use.
sealer provides additional corrosion protection and greater
2. Referenced Documents lubricity than Grade 2.
2 3.1.4 Grade 4 requires a minimum basecoat thickness of
2.1 ASTM Standards:
2
0.31 mil (0.092 oz/ft ). This is usually applied in three coats to
B117 Practice for Operating Salt Spray (Fog) Apparatus
bulk parts, or one to two coats to racked parts. No topcoat is
D610 Practice for Evaluating Degree of Rusting on Painted
applied in Grade 4.
Steel Surfaces
3.1.5 Grade 5 requires a minimum basecoat thickness of
D3359 Test Methods for Measuring Adhesion by Tape Test
2
0.20mil(0.066oz/ft )andasinglecoatofthelubricatedsealer.
F606 Test Methods for Determining the Mechanical Prop-
The sealer provides additional corrosion protection than Grade
erties of Externally and Internally Threaded Fasteners,
2 and greater lubricity than Grade 3.
Washers, Direct Tension Indicators, and Rivets
3.1.6 Grade 6 requires a minimum basecoat thickness of
2
0.20 mil (0.066 oz/ft ) with various pigmented topcoats ap-
1
This specification is under the jurisdiction of ASTM Committee F16 on
plied. The topcoats can be black or various other colors.
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
Fasteners.
4. Ordering Information
Current edition approved Dec. 1, 2010. Published January 2011. Originally
approved in 1988. Last previous edition approved in 2004 as F1136–04. DOI: 4.1 Ordersforpartsunderthisspecificationshallincludethe
10.1520/F1136-10.
following information:
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.1.1 Quantity of parts,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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
---------------------- Page: 1 ----------------------
F1136 – 10
TABLE 1 Coating Classification
specified mechanical properties. Where mechanical properties
Minimum are not specified, oversizing is subject to the approv
...
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:F1136–04 Designation: F1136 – 10
Standard Specification for
Zinc/Aluminum Corrosion Protective Coatings for
1
Fasteners
This standard is issued under the fixed designation F1136; 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*
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
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.
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
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
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.
2
3.1.1 Grade 1 requires a minimum basecoat thickness of 0.16 mil (0.052 oz/ft ). This is usually applied in two coats to bulk
parts, or one coat to racked parts. No topcoat is applied in Grade 1.
2
3.1.2 Grade 2 requires a minimum basecoat thickness of 0.20 mil (0.066 oz/ft ). This is usually applied in two coats to bulk
parts, or one coat to racked parts. No topcoat is applied in Grade 2.
2
3.1.3 Grade 3 requires a minimum basecoat thickness of 0.20 mil (0.066 oz/ft ) and a single coat of the clear sealer. The sealer
provides additional corrosion protection and greater lubricity than Grade 2.
2
3.1.4 Grade 4 requires a minimum basecoat thickness of 0.31 mil (0.092 oz/ft ). This is usually applied in three coats to bulk
parts, or one to two coats to racked parts. No topcoat is applied in Grade 4.
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.
´1
Current edition approved July 1, 2004. Published July 2004. Originally approved in 1988. Last previous edition approved in 1998 as F1136–88(1998) . DOI:
10.1520/F1136-04.
Current edition approved Dec. 1, 2010. Published January 2011. Originally approved in 1988. Last previous edition approved in 2004 as F1136–04. DOI:
10.1520/F1136-10.
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
---------------------- Page: 1 ----------------------
F1136 – 10
TABLE 1 Coating Classification
Minimum
Coating Coating
SST
Grade Thickness Weight
Topcoat Type
Hours (h)
No. Average Average
2
(mil) (oz/ft )
(C) (NC)
1 None 0.16 to 0.20 0.052 to 0.066 240 ----
2 None 0.20 to 0.3
...
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