ASTM F1136-04

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 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: 21.060.01 - Fasteners in general
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.03 - Coatings on Fasteners

Relations

• Replaces: ASTM F1136-88(1998)e1 - Standard Specification for Chromium/Zinc Corrosion Protective Coatings for Fasteners
• Effective Date: 01-Jul-2004
• Replaced By: ASTM F1136-10 - Standard Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners
• 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: F1136 – 04
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 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.
626°F.
3.1.1 Grade 1 requires a minimum basecoat thickness of
1.3 The coating process does not induce the possibility of
2
0.16 mil (0.052 oz/ft ). This is usually applied in two coats to
internal hydrogen embrittlement providing that the fasteners
bulk parts, or one coat to racked parts. No topcoat is applied in
have not been cleaned or pre-treated with an acid or phosphate.
Grade 1.
Alkaline cleaning or vapor degreasing is required along with
3.1.2 Grade 2 requires a minimum basecoat thickness of
shot blasting to remove rust or scale.
2
0.20 mil (0.066 oz/ft ). This is usually applied in two coats to
1.4 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 July 1, 2004. Published July 2004. Originally approved
´1
in 1988. Last previous edition approved in 1998 as F1136 – 88 (1998) . DOI:
4.1 Ordersforpartsunderthisspecificationshallincludethe
10.1520/F1136-04.
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 [e-mail]. For Annual Book of ASTM
4.1.2 Grade of coating as given in Table 1,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F1136 – 04
TABLE 1 Coating Classification
providing the finished product (after coating) meets all the
Minimum specified mechanical properties. Where mechanical properties
Coating Coating
SST
Grade Thickness Weight are not specified, oversizing is subject to the approval of the
Topcoat Type
Hours (h)
No. Average Average
purchaser.
2
(mil) (oz/ft )
(C) (NC)
5.6 Hydrogen Embrittlement—When specified in the pur-
1 None 0.16 to 0.20 0.052
...