ASTM F1137-00(2006)

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Designation: F1137 – 00 (Reapproved 2006)
Standard Specification for
Phosphate/Oil and Phosphate/Organic 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.
TABLE 1 Classification and Performance Requirements of
1. Scope
Protective Coatings
1.1 This specification covers the basic requirements for
Grade No. Zinc Supplemental Coating Salt Spray,
seven grades of corrosion protection for fasteners. Grade 0A
Phosphate, Coating Thickness, h
consists of a zinc phosphate coating with no additional sealer
g/m µm
A
(dry), Grade 0B consists of a zinc phosphate coating with a dry
Grade 0A 11, min none see 5.5 72
organic sealer, Grade 0C, Grade 0D, and Grade I consist of a Grade 0B 11, min sealer see 5.5 72
Grade 0C 11, min protective oil-type see 5.5 24
zinc phosphate coating with supplemental protective oil type
compound
compound, and Grades II and III consist of a zinc phosphate
Grade 0D 11, min protective oil-type see 5.5 72
compound
with a supplemental zinc-rich epoxy resin coating (Grade II
Grade I 26–32 protective oil-type see 5.5 168
includes a clear organic topcoat).
compound
B
1.2 This specification is intended primarily for fasteners
Grade II 13–16 zinc-rich resin 15–25 240
flake
such as nuts, clips, washers, and other ferrous threaded and
Grade III 13–16 zinc-rich resin 10–20 400
non-threaded fasteners that require corrosion protection.
C
powder
1.3 These coatings may or may not have a decorative finish.
A
When testing Grade 0A finished parts, a protective oil coating shall be added
before salt spray testing.
2. Referenced Documents B
Zinc-rich resin to contain 60 % minimum metallic zinc flake by volume with 14
to 16 % aluminum.
2.1 ASTM Standards:
C
Zinc-rich resin to contain 80 % minimum metallic zinc powder by volume with
B117 Practice for Operating Salt Spray (Fog) Apparatus
trace aluminum.
D2247 Practice for Testing Water Resistance of Coatings in
100 % Relative Humidity
4.1.1 Quantity of parts,
D3359 Test Methods for Measuring Adhesion by Tape Test
4.1.2 Grade required (see Table 1), and
F1470 Practice for Fastener Sampling for Specified Me-
4.1.3 Any additions agreed upon between the purchaser and
chanical Properties and Performance Inspection
the supplier.
3. Classification
5. Requirements
3.1 The zinc phosphate treatment and subsequent protective
5.1 Appearance—Unless otherwise agreed upon between
coatings are classified into seven grades according to the
the purchaser and the producer, the color of the protective
requirements shown inTable 1. Phosphate bath concentrations,
coating shall be as-coated gray for Grades 0A, 0B, 0C, and 0D,
temperatures and immersion times recommended by the
black for Grade I, and metallic gray for Grades II and III. In
chemical manufacture should be followed.
addition, Grades II and III shall be free from tears, sags, and
excess coating that may affect appearance or performance, or
4. Ordering Information
both.
4.1 Orders for material under this specification shall include
5.2 Adhesion—The coating for Grades II and III shall show
the following information:
no evidence of blistering nor other appearance changes after
exposure to humidity testing for 96-h minimum. It shall show
This specification is under the jurisdiction of ASTM Committee F16 on
no more than 3.0-mm peal-back from intersection of lines
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
scribed and tape tested immediately after a 10-min recovery
Fasteners.
period following exposure, and no other peeling in area under
Current edition approved June 1, 2006. Published June 2006. Originally
the tape.
approved in 1988. Last previous edition approved in 2000 as F1137 – 00. DOI:
10.1520/F1137-00R06.
5.3 Corrosion Resistance—These coatings shall be capable
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
of withstanding neutral salt spray for the minimum h specified
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
inTable 1 with no base metal corrosion on significant surfaces.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Significant surfaces on threaded fasteners are defined as the
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