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ASTM F1136-88(1998)e1

(Specification)

Standard Specification for Chromium/Zinc Corrosion Protective Coatings for Fasteners

Standard Specification for Chromium/Zinc Corrosion Protective Coatings for Fasteners

SCOPE
1.1 This specification covers the basic requirements for three grades of chromium/zinc inorganic coatings for threaded fasteners.
1.2 These coatings are applied by conventional dip-spin or dip-drain methods.
1.3 The coating process does not induce hydrogen embrittlement providing that the fasteners have not been pretreated with an acid.

General Information

Status
Historical
Publication Date
09-Oct-1998
ICS
21.060.01 - Fasteners in general
25.220.40 - Metallic coatings
Technical Committee
F16 - Fasteners
Drafting Committee
F16.03 - Coatings on Fasteners
Current Stage
Ref Project

Relations

Replaced By
ASTM F1136-04 - Standard Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners
Effective Date
01-Jul-2004

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ASTM F1136-88(1998)e1 - Standard Specification for Chromium/Zinc Corrosion Protective Coatings for FastenersASTM F1136-88(1998)e1 - Standard Specification for Chromium/Zinc Corrosion Protective Coatings for Fasteners
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ASTM F1136-88(1998)e1 - Standard Specification for Chromium/Zinc Corrosion Protective Coatings for Fasteners
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
e1
Designation: F 1136 – 88 (Reapproved 1998)
Standard Specification for
Chromium/Zinc Corrosion Protective Coatings for
Fasteners
This standard is issued under the fixed designation F 1136; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Section 2 was editorially updated in October 1998.
TABLE 1 Classification of Coatings
1. Scope
Chromium/Zinc
1.1 This specification covers the basic requirements for
Grade Supplemental Thickness, μm
Coating Weight, Salt Spray, h
No. Coating Average
three grades of chromium/zinc inorganic coatings for threaded 2
g/m
fasteners.
1 14.0–17.2 No 5.0–6.0 144
1.2 These coatings are applied by conventional dip-spin or 2 20.4–23.6 No 6.0–13.0 240
3 20.4–27.0 clear sealer 7.0–13.0 400
dip-drain methods.
1.3 The coating process does not induce hydrogen em-
brittlement providing that the fasteners have not been pre-
5. Requirements
treated with an acid.
5.1 Appearance—The coating shall have a uniform appear-
2. Referenced Documents
ance free from tears and other discontinuities which may affect
2.1 ASTM Standards: the appearance or performance, or both, of the coating.
B 117 Test Method of Salt Spray (Fog) Testing
5.2 Adhesion—The coating shall show no evidence of
D 1000 Test Methods for Pressure-Sensitive Adhesive- blistering or other changes in appearance after exposure to
Coated Tapes Used for Electrical and Electronic Applica-
humidity testing for a minimum of 96 h. In addition there shall
tions be no more than 3.0 mm peel-back from the intersection of
D 2247 Practice for Testing Water Resistance of Coatings in
scribed lines that are taped tested immediately following a 10
100 % Relative Humidity min recovery period from the humidity test and there shall be
F 1470 Guide for Fastener Sampling for Specified Mechani- no other peeling under tape (see 6.3 and 6.4).
cal Properties and Performance Inspection
5.3 Corrosion—These coatings shall be capable of with-
standing neutral salt spray testing for the minimum h specified
3. Classification
in Table 1. Unless otherwise defined, acceptable corrosion
3.1 These coatings are classified into three grades according
resistance shall be where there is no base metal corrosion on
to the requirements in Table 1.
significant surfaces.
5.3.1 Significant surfaces are defined as the exposed sur-
4. Ordering Information
faces of the fastener when it is installed in a normal manner.
4.1 Orders for material under this specification shall include
Surfaces on which a controlled deposit ordinarily cannot be
the following information:
obtained, such as holes, recesses, bases of angles, and similar
4.1.1 Quantity of parts.
areas are normally exempt from the requirements of significant
4.1.2 Grade of coating.
surfaces.
4.1.3 Any additions to the specification as agreed upon by
5.4 Blisters—There shall be no signs of blisters after testing
the purchaser and the supplier.
in accordance with 6.1 and 6.3.
5.5 Thread Fit—The coating shall not have an adverse
affect on normal installation and removal practices as deter-
This specification is under the jurisdiction of ASTM Committee F-16 on
mined by the proper GO thread gauge. Excessive coating on
Fasteners and is the direct responsibility of Subcommittee F16.03 on Metal Coatings
the threaded surface may be acceptable only when the fastener
on Threaded Fasteners.
Current edition approved Feb. 26, 1988. Published April 1988.
passes the torque test outlined in 7.2.3.
Annual Book of ASTM Standards, Vol 03.02.
5.5.1 The thickness of the coating is limited by the basic
Annual Book of ASTM Standards, Vol 10.01.
4 thread size. Where greater t
...

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1.4.1 Non-SI units are provided in Table 1 and Table 2 and in 7.1.2.1/7.1.2.2 because these are common units used in the industry.
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SCOPE
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SCOPE
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1.2 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 nonconformance with the standard.  
1.3 The following precautionary caveat applies only to the test method portion, Section 6, of this specification: 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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