ASTM F1428-23
(Specification)Standard Specification for Aluminum Particle-Filled Basecoat/Organic or Inorganic Topcoat, Corrosion Protective Coatings for Fasteners
Standard Specification for Aluminum Particle-Filled Basecoat/Organic or Inorganic Topcoat, Corrosion Protective Coatings for Fasteners
ABSTRACT
This specification covers corrosion-resistant coating consisting of an inorganic aluminum particle-filled basecoat and an organic or inorganic topcoat. The basecoat is a water-dilutable slurry containing aluminum particles dispersed in a liquid binder of chromate/phosphate compounds. The organic topcoats consist of polymer resins and dispersed pigments. The inorganic topcoats consist of ceramic oxide pigments dispersed in a liquid binder of chromate/phosphate compounds. These coatings are applied by conventional dip/spin, dip/drain, or spray methods. The coating systems defined by this specification can be applied to ferrous alloy steels, aluminum, and ferritic and austenitic stainless steels. The inorganic aluminum particle-filled basecoat and the subsequent topcoats are classified into three groups, with subsequent subgroups. Materials shall be tested and the individual grades shall conform to specified values of appearance, adhesion, corrosion, thread-fit, weathering, coating thickness, and humidity.
SCOPE
1.1 This specification covers the basic requirements for a corrosion-resistant coating consisting of an inorganic aluminum particle-filled basecoat and an organic or inorganic topcoat, depending on the specific requirements.
1.2 The coating may be specified with basecoat only, or with the top coated with compatible organic polymer or inorganic topcoats, depending on the specific requirements.
1.3 The basecoat is a water-dilutable slurry containing aluminum particles dispersed in a liquid binder of chromate/phosphate compounds.
1.4 The organic topcoats consist of polymer resins and dispersed pigments and are for service where temperatures do not exceed 230 °C (450 °F).
1.5 The inorganic topcoats consist of ceramic oxide pigments dispersed in a liquid binder of chromate/phosphate compounds and are for service where temperatures do not exceed 645 °C (1200 °F).
1.6 These coatings are applied by conventional dip/spin, dip/drain, or spray methods.
1.7 The coating process does not normally induce hydrogen embrittlement, provided that the parts to be coated have not been subjected to an acid cleaner or pretreatment (see Note 1).
Note 1: Although this coating material contains water, it has a relatively low susceptibility to inducing hydrogen embrittlement in steel parts of tensile strengths equal to or greater than 1000 MPa (approximately RC31). Normal precautions for preparing, descaling, and cleaning steels of these tensile strengths must be observed. An initial stress relief treatment should be considered prior to any chemical treatment or cleaning operation. Acids or other treatments that evolve hydrogen should be avoided. Mechanical cleaning methods may be considered. Some steels are more susceptible to hydrogen embrittlement than others and may also require hydrogen embrittlement relief baking after cleaning but before coating. Since no process can completely guarantee freedom from embrittlement, careful consideration must be given to the entire coating process and the specific steel alloy employed.
1.8 The coating systems defined by this specification can be applied to ferrous alloy steels, aluminum, and ferritic and austenitic stainless steels.
1.9 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.10 The following safety hazards caveat pertains only to the test methods 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.
1.11 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of Inte...
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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.
Designation: F1428 − 23
Standard Specification for
Aluminum Particle-Filled Basecoat/Organic or Inorganic
1
Topcoat, Corrosion Protective Coatings for Fasteners
This standard is issued under the fixed designation F1428; 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.
process and the specific steel alloy employed.
1. Scope
1.8 The coating systems defined by this specification can be
1.1 This specification covers the basic requirements for a
applied to ferrous alloy steels, aluminum, and ferritic and
corrosion-resistant coating consisting of an inorganic alumi-
austenitic stainless steels.
num particle-filled basecoat and an organic or inorganic
topcoat, depending on the specific requirements.
1.9 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
1.2 The coating may be specified with basecoat only, or with
only.
the top coated with compatible organic polymer or inorganic
topcoats, depending on the specific requirements.
1.10 The following safety hazards caveat pertains only to
the test methods portion, Section 6, of this specification: This
1.3 The basecoat is a water-dilutable slurry containing
standard does not purport to address all of the safety concerns,
aluminum particles dispersed in a liquid binder of chromate/
if any, associated with its use. It is the responsibility of the user
phosphate compounds.
of this standard to establish appropriate safety, health, and
1.4 The organic topcoats consist of polymer resins and
environmental practices and determine the applicability of
dispersed pigments and are for service where temperatures do
regulatory limitations prior to use.
not exceed 230 °C (450 °F).
1.11 This international standard was developed in accor-
1.5 The inorganic topcoats consist of ceramic oxide pig- dance with internationally recognized principles on standard-
ments dispersed in a liquid binder of chromate/phosphate
ization established in the Decision on Principles for the
compounds and are for service where temperatures do not Development of International Standards, Guides and Recom-
exceed 645 °C (1200 °F).
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.6 These coatings are applied by conventional dip/spin,
dip/drain, or spray methods.
2. Referenced Documents
1.7 The coating process does not normally induce hydrogen
2
2.1 ASTM Standards:
embrittlement, provided that the parts to be coated have not
B117 Practice for Operating Salt Spray (Fog) Apparatus
been subjected to an acid cleaner or pretreatment (see Note 1).
B487 Test Method for Measurement of Metal and Oxide
NOTE 1—Although this coating material contains water, it has a
Coating Thickness by Microscopical Examination of
relatively low susceptibility to inducing hydrogen embrittlement in steel
Cross Section
parts of tensile strengths equal to or greater than 1000 MPa (approxi-
B568 Test Method for Measurement of Coating Thickness
mately RC31). Normal precautions for preparing, descaling, and cleaning
by X-Ray Spectrometry
steels of these tensile strengths must be observed. An initial stress relief
treatment should be considered prior to any chemical treatment or
D1186 Test Methods for Nondestructive Measurement of
cleaning operation. Acids or other treatments that evolve hydrogen should
Dry Film Thickness of Nonmagnetic Coatings Applied to
be avoided. Mechanical cleaning methods may be considered. Some steels 3
a Ferrous Base (Withdrawn 2006)
are more susceptible to hydrogen embrittlement than others and may also
D2247 Practice for Testing Water Resistance of Coatings in
require hydrogen embrittlement relief baking after cleaning but before
100 % Relative Humidity
coating. Since no process can completely guarantee freedom from
embrittlement, careful consideration must be given to the entire coating
D3359 Test Methods for Rating Adhesion by Tape Test
1 2
This specification is under the jurisdiction of ASTM Committee F16 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Fasteners. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Feb. 1, 2023. Published February 2023. Originally the ASTM website.
3
approved in 1992. Last previous edition a
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1428 − 92 (Reapproved 2017) F1428 − 23
Standard Specification for
Aluminum Particle-Filled Basecoat/Organic or Inorganic
1
Topcoat, Corrosion Protective Coatings for Fasteners
This standard is issued under the fixed designation F1428; 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
1.1 This specification covers the basic requirements for a corrosion-resistant coating consisting of an inorganic aluminum
particle-filled basecoat and an organic or inorganic topcoat, depending on the specific requirements.
1.2 The coating may be specified with basecoat only, or with the top coated with compatible organic polymer or inorganic
topcoats, depending on the specific requirements.
1.3 The basecoat is a water-dilutable slurry containing aluminum particles dispersed in a liquid binder of chromate/phosphate
compounds.
1.4 The organic topcoats consist of polymer resins and dispersed pigments and are for service where temperatures do not exceed
230°C (450°F).230 °C (450 °F).
1.5 The inorganic topcoats consist of ceramic oxide pigments dispersed in a liquid binder of chromate/phosphate compounds and
are for service where temperatures do not exceed 645°C (1200°F).645 °C (1200 °F).
1.6 These coatings are applied by conventional dip/spin, dip/drain, or spray methods.
1.7 The coating process does not normally induce hydrogen embrittlement, provided that the parts to be coated have not been
subjected to an acid cleaner or pretreatment (see Note 1).
NOTE 1—Although this coating material contains water, it has a relatively low susceptibility to inducing hydrogen embrittlement in steel parts of tensile
strengths equal to or greater than 1000 MPa (approximately RC31). Normal precautions for preparing, descaling, and cleaning steels of these tensile
strengths must be observed. An initial stress relief treatment should be considered prior to any chemical treatment or cleaning operation. Acids or other
treatments that evolve hydrogen should be avoided. Mechanical cleaning methods may be considered. Some steels are more susceptible to hydrogen
embrittlement than others and may also require hydrogen embrittlement relief baking after cleaning but before coating. Since no process can completely
guarantee freedom from embrittlement, careful consideration must be given to the entire coating process and the specific steel alloy employed.
1.8 The coating systems defined by this specification can be applied to ferrous alloy steels, aluminum, and ferritic and austenitic
stainless steels.
1.9 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1
This specification is under the jurisdiction of ASTM Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on Fasteners.
Current edition approved Dec. 1, 2017Feb. 1, 2023. Published December 2017February 2023. Originally approved in 1992. Last previous edition approved in 20112017
as F1428 – 92 (2011). DOI: 10.1520/F1428-92R17.(2017). DOI: 10.1520/F1428-23.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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F1428 − 23
1.10 The following safety hazards caveat pertains only to the test methods 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.
1.11 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B117 Practice for Operating Salt Spray (Fog) Apparatus
B487 Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section
B568 Test Method for Measurement of Coating Thickness by X-Ray Spectrometry
D1186 Test Methods for Nondestructive Measureme
...
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