ASTM F1136M-04

Standard Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners [Metric]

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 330 °C. 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. In this specification, units are presented in the metric scale.
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.
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 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.

General Information

• Status: Historical
• Publication Date: 30-Jun-2004
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.03 - Coatings on Fasteners

Relations

• Replaced By: ASTM F1136M-10 - Standard Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners [Metric] (Withdrawn 2011)
• Effective Date: 01-Dec-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F1136M – 04
Standard Specification for
Zinc/Aluminum Corrosion Protective Coatings for Fasteners
1
(Metric)
This standard is issued under the fixed designation F1136M; 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 F1470 Practice for Fastener Sampling for Specified Me-
chanical Properties and Performance Inspection
1.1 This specification covers the basic requirements for
F1789 Terminology for F16 Mechanical Fasteners
water-based zinc/aluminum dispersion inorganic basecoats and
F1940 Test Method for Process Control Verification to
optional sealers and topcoats for fasteners. The basecoat can
Prevent Hydrogen Embrittlement in Plated or Coated
contain chrome (C) or be non-chrome (NC).
Fasteners
1.2 These coatings are applied by conventional dip-spin,
dip-drain, or spray methods to ferrous parts which can be
3. Classification
handled through a cleaning, coating, and baking operation, and
3.1 Thesecoatingsareclassifiedintosixgradesaccordingto
which are not adversely affected by baking temperatures up to
the requirements in Table 1.
330°C.
3.1.1 Grade 1 requires a minimum basecoat thickness of 4
1.3 The coating process does not induce the possibility of
2
µm(16g/m ).Thisisusuallyappliedintwocoatstobulkparts,
internal hydrogen embrittlement providing that the fasteners
or one coat to racked parts. No topcoat is applied in Grade 1.
have not been cleaned or pre-treated with an acid or phosphate.
3.1.2 Grade 2 requires a minimum basecoat thickness of 5
Alkaline cleaning or vapor degreasing is required along with
2
µm(20g/m ).Thisisusuallyappliedintwocoatstobulkparts,
shot blasting to remove rust or scale.
or one coat to racked parts. No topcoat is applied in Grade 2.
1.4 This standard does not purport to address all of the
3.1.3 Grade 3 requires a minimum basecoat thickness of 5
safety concerns, if any, associated with its use. It is the
2
µm (20 g/m ) and a single coat of the clear sealer. The sealer
responsibility of the user of this standard to establish appro-
provides additional corrosion protection and greater lubricity
priate safety and health practices and determine the applica-
than Grade 2.
bility of regulatory limitations prior to use.
3.1.4 Grade 4 requires a minimum basecoat thickness of 8
2
2. Referenced Documents µm (28 g/m ). This is usually applied in three coats to bulk
2
parts, or one to two coats to racked parts. No topcoat is applied
2.1 ASTM Standards:
in Grade 4.
B117 Practice for Operating Salt Spray (Fog) Apparatus
3.1.5 Grade 5 requires a minimum basecoat thickness of 5
D610 Practice for Evaluating Degree of Rusting on Painted
2
µm (20 g/m ) and a single coat of the lubricated sealer. The
Steel Surfaces
sealer provides additional corrosion protection than Grade 2
D3359 Test Methods for Measuring Adhesion by Tape Test
and greater lubricity than Grade 3.
F606M Test Methods for Determining the Mechanical
3.1.6 Grade 6 requires a minimum basecoat thickness of 5
Properties of Externally and InternallyThreaded Fasteners,
2
µm (20 g/m ) with various pigmented topcoats applied. The
Washers, and Rivets (Metric)
topcoats can be black or various other colors.
4. Ordering Information
1
This specification is under the jurisdiction of ASTM Committee F16 on
4.1 Ordersforpartsunderthisspecificationshallincludethe
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
following information:
Fasteners.
4.1.1 Quantity of parts,
Current edition approved July 1, 2004. Published July 2004. DOI: 10.1520/
F1136M-04.
4.1.2 Grade of coating as given in Table 1,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.1.3 Specify chrome (C) or non-chrome (NC). Unless
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
otherwise specified, coating to this specification will be sup-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. plied with chrome,
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1

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F1136M – 04
TABLE 1 Coating Classification
specified mechanical properties. Where mechanical properties
Minimum are not specified, oversizing is subject to the approval of the
Coating Coating
SST
Grade Thickness Weight purchaser.
Topcoat Type
Hours (h)
No. Average Average
5.6 Hydrogen Embrittlement—When specified in the pur-
2
(µm) (g/m )
(C) (NC)
chase order, the applicator shall certify that the process did not
1 None 4 to 5 16 to 20 240 ----
expose the parts to acid
...