ASTM F1137-11e1

Standard Specification for Phosphate/Oil Corrosion Protective Coatings for Fasteners

ABSTRACT
This specification covers the basic physical requirements and test methods for phosphate/oil and phosphate/organic corrosion protective coatings for fasteners such as nuts, clips, washers, and other ferrous threaded and non-threaded fasteners that require corrosion protection. The zinc phosphate treatment and subsequent protective coatings are classified into seven grades according to the following requirements: Grade 0A consists of a zinc phosphate coating with no additional sealer (dry); Grade 0B consists of a zinc phosphate coating with a dry organic sealer; Grades 0C, 0D, and I consist of a zinc phosphate coating with supplemental protective oil type compound; and Grades II and III consist of a zinc phosphate with a supplemental zinc-rich epoxy resin coating (with the addition of a clear organic topcoat for Grade II). These coatings may or may not have a decorative finish. The coatings shall meet the requirements specified for appearance, adhesion, corrosion resistance, coating flexibility, thread fit, and dry-to-touch characteristics. In addition, they shall also undergo humidity and coating thickness tests.
SCOPE
1.1 This specification covers the basic requirements for four grades of corrosion protection for fasteners. Grade A consists of a zinc phosphate coating with no additional sealer (dry), Grade B consists of a zinc phosphate coating with a dry organic sealer, Grade C, and Grade D consist of a zinc phosphate coating with supplemental protective oil type compound.
1.2 This specification is intended primarily for fasteners such as nuts, clips, washers, and other ferrous threaded and non-threaded fasteners that require corrosion protection.
1.3 These coatings may or may not have a decorative finish.

General Information

• Status: Historical
• Publication Date: 30-Apr-2011
• ICS: 21.060.01 - Fasteners in general
• ICS: 25.220.60 - Organic coatings
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.03 - Coatings on Fasteners

Relations

• Replaces: ASTM F1137-11 - Standard Specification for Phosphate/Oil and Phosphate/Organic Corrosion Protective Coatings for Fasteners
• Effective Date: 01-May-2011
• Replaced By: ASTM F1137/F1137M-18 - Standard Specification for Phosphate/Oil Corrosion Protective Coatings for Fasteners
• Effective Date: 01-Jun-2018
• Referred By: ASTM F2833-11(2017) - Standard Specification for Corrosion Protective Fastener Coatings with Zinc Rich Base Coat and Aluminum Organic/Inorganic Type
• Effective Date: 01-May-2011
• Referred By: ASTM F1940-07a(2019) - Standard Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated Fasteners
• Effective Date: 01-May-2011

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
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Designation:F1137 −11
Standard Specification for
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Phosphate/Oil Corrosion Protective Coatings for Fasteners
This standard is issued under the fixed designation F1137; 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.
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´ NOTE—1.1 was editorially corrected in February 2012.
1. Scope* 5. Requirements
1.1 This specification covers the basic requirements for four
5.1 Appearance—Unless otherwise agreed upon between
grades of corrosion protection for fasteners. Grade A consists the purchaser and the producer, the color of the protective
of a zinc phosphate coating with no additional sealer (dry),
coating shall be as-coated gray for Grades A, B, C, and D.
GradeBconsistsofazincphosphatecoatingwithadryorganic
5.2 Corrosion Resistance—These coatings shall be capable
sealer, Grade C, and Grade D consist of a zinc phosphate
of withstanding neutral salt spray for the minimum h specified
coating with supplemental protective oil type compound.
in Table 1 with no base metal corrosion on significant surfaces.
1.2 This specification is intended primarily for fasteners
Significant surfaces on threaded fasteners are defined as the
such as nuts, clips, washers, and other ferrous threaded and exposed surfaces when the fasteners are installed in a normal
non-threaded fasteners that require corrosion protection. manner (bolt head, nut head, face, etc.). On other surfaces
where control of the coating cannot be obtained under normal
1.3 These coatings may or may not have a decorative finish.
processing such as holes, recesses, threads, etc., the above
requirements do not apply.
2. Referenced Documents
2 5.3 Thread Fit—The maximum thickness of coating which
2.1 ASTM Standards:
may be applied to threads on threaded products is limited by
B117 Practice for Operating Salt Spray (Fog) Apparatus
the basic thread size (see 8.2). Threads may be produced
F1470 Practice for Fastener Sampling for Specified Me-
undersize/oversize (before coating) to accommodate the coat-
chanical Properties and Performance Inspection
ing thickness, providing the finished product (after coating)
meets all specified mechanical properties. All undersize/
3. Classification
oversize must be within permissible limits as agreed upon
3.1 The zinc phosphate treatment and subsequent protective
between the supplier and the purchaser.
coatings are classified into four grades according to the
5.4 Dry-to-Touch—Grade C shall be evenly coated and
requirements shown in Table 1.
dry-to-touchsuchthatwhenheldwithfilterpaperorequivalent
and applying hand pressure for 5 to 10 s, there shall be no
4. Ordering Information
visible staining of the filter paper when viewed without use of
4.1 Orders for material under this specification shall include
supplementary magnification. For referee purposes, this test
the following information:
shall be performed using a force of 10 N as measured with a
4.1.1 Quantity of parts,
load-indicating gage.
4.1.2 Grade required (see Table 1), and
4.1.3 Any additions agreed upon between the purchaser and
6. Sampling
the supplier.
6.1 The purchaser may request samples in accordance with
Practice F1470.
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This specification is under the jurisdiction of ASTM Committee F16 on
7. Test Methods
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
Fasteners.
7.1 The corrosion resistance shall be determined in accor-
Current edition approved May 1, 2011. Published May 2011. Originally
dance with Practice B117.
approved in 1988. Last previous edition approved in 2006 as F1137 – 00(2006).
DOI: 10.1520/F1137-11E01.
7.2 The coating thickness may be determined by micro-
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
scopic examination of the cross-section taken perpendicular to
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
the significant surface or by determining the coating mass
Standards volume information, refer to the standard’s Document Summary page on
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the ASTM website. (g/m ) by a weigh-strip-weigh method and then converting to
*A Summary of Changes section appears at the end of this standard
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F1137−11
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TABLE 1 Classification and Performance Requirements of
A = area of deposit, m , and
Protective Coatings
3
D = density of coating, kg/m .
Grade No. Zinc Supplemental Coating Salt Spray,
Phosphate, Coating Thickness, µm h
8. Inspection
2
g/m
A
8.1 Samples shall be taken in accordance with Practice
Grade A 11, min
...