ASTM F2833-11

Standard Specification for Corrosion Protective Fastener Coatings with Zinc Rich Base Coat and Aluminum Organic/Inorganic Type

ABSTRACT
This specification covers the basic requirements for chromium-free fastener coatings that combine an inorganic zinc-rich basecoat with an aluminum-rich topcoat that contains an integrated lubricant. These coatings are applied by conventional dip-spin, dip-drain, or spray methods to ferrous parts which can be handled through a cleaning, or phosphate, coating, and baking operation. Phosphating or shot blast is required to clean and prepare the surface of the steel. These coatings are bake cured at temperatures up to 500°F.
SCOPE
1.1 This specification covers the basic requirements for chromium-free fastener coatings that combine an inorganic zinc-rich basecoat with an aluminum-rich topcoat that contains an integrated lubricant.
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, or phosphate, coating, and baking operation. Phosphating or shot blast is required to clean and prepare the surface of the steel. These coatings are bake cured at temperatures up to 500°F.
Note 1—If used, phosphate to be used in accordance with Specification F1137, grade 0.
1.3 Units—The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
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: 31-Jan-2011
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.03 - Coatings on Fasteners

Relations

• Replaced 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-Dec-2017
• Referred By: ASTM A563/A563M-21ae1 - Standard Specification for Carbon and Alloy Steel Nuts (Inch and Metric)
• Effective Date: 01-Feb-2011
• Referred By: ASTM F3148-17a - Standard Specification for High Strength Structural Bolt Assemblies, Steel and Alloy Steel, Heat Treated, 144ksi Minimum Tensile Strength, Inch Dimensions
• Effective Date: 01-Feb-2011
• Referred By: ASTM F3394/F3394M-20 - Standard Specification for Hardened Steel Backup and Reaction Washers Inch and Metric Dimensions<rangeref></rangeref >
• Effective Date: 01-Feb-2011
• Referred By: ASTM F3125/F3125M-22 - Standard Specification for High Strength Structural Bolts and Assemblies, Steel and Alloy Steel, Heat Treated, Inch Dimensions 120 ksi and 150 ksi Minimum Tensile Strength, and Metric Dimensions 830 MPa and 1040 MPa Minimum Tensile Strength
• Effective Date: 01-Feb-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
Designation:F2833 −11
Standard Specification for
Corrosion Protective Fastener Coatings with Zinc Rich Base
1
Coat and Aluminum Organic/Inorganic Type
This standard is issued under the fixed designation F2833; 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 erties of Externally and Internally Threaded Fasteners,
Washers, and Rivets (Metric)
1.1 This specification covers the basic requirements for
F1137 Specification for Phosphate/Oil Corrosion Protective
chromium-free fastener coatings that combine an inorganic
Coatings for Fasteners
zinc-rich basecoat with an aluminum-rich topcoat that contains
F1470 Practice for Fastener Sampling for Specified Me-
an integrated lubricant.
chanical Properties and Performance Inspection
1.2 These coatings are applied by conventional dip-spin,
F1624 Test Method for Measurement of Hydrogen Em-
dip-drain, or spray methods to ferrous parts which can be
brittlement Threshold in Steel by the Incremental Step
handled through a cleaning, or phosphate, coating, and baking
Loading Technique
operation. Phosphating or shot blast is required to clean and
F1789 Terminology for F16 Mechanical Fasteners
prepare the surface of the steel. These coatings are bake cured
F1940 Test Method for Process Control Verification to
at temperatures up to 500°F.
Prevent Hydrogen Embrittlement in Plated or Coated
Fasteners
NOTE1—Ifused,phosphatetobeusedinaccordancewithSpecification
F1137, grade 0.
3. Classification
1.3 Units—The values stated in inch-pound units are to be
regarded as standard. No other units of measurement are
3.1 When the zinc phosphate option is used, its coating
included in this standard.
weight shall be in the range of 8-20 g/square meter. If used,
1.4 This standard does not purport to address all of the phosphate to be used in accordance to Specification F1137
safety concerns, if any, associated with its use. It is the
grade 0.
responsibility of the user of this standard to establish appro-
3.2 These coatings are classified into 5 different types:
priate safety and health practices and determine the applica-
3.2.1 Grade 1—requires a minimum basecoat thickness of
bility of regulatory limitations prior to use.
0.27 mils applied in one coat. An organic topcoat with an
integrated lubricant is applied at a minimum thickness of 0.20
2. Referenced Documents
mils in one coat and ; with no additional layers.
2
2.1 ASTM Standards:
3.2.2 Grade 2—requires a minimum basecoat thickness of
B117 Practice for Operating Salt Spray (Fog) Apparatus
0.27 mils applied in two coats bulk or one coat sprayed. An
D610 Practice for Evaluating Degree of Rusting on Painted
organic topcoat with an integrated lubricant is applied at a
Steel Surfaces
minimumthicknessof0.20milsinonecoat;withnoadditional
D3359 Test Methods for Measuring Adhesion by Tape Test
layers.
F606 Test Methods for Determining the Mechanical Proper-
3.2.3 Grade 3—requires a minimum basecoat thickness of
ties of Externally and Internally Threaded Fasteners,
0.27 mils applied in one coat. This basecoat is dark gray in
Washers, Direct Tension Indicators, and Rivets
color. A black organic topcoat with an integrated lubricant is
F606M Test Methods for Determining the Mechanical Prop-
applied at a minimum thickness of 0.20 mils in two coats bulk
or one coat sprayed; with no additional layers.
1
This specification is under the jurisdiction of ASTM Committee F16 on
3.2.4 Grade 4— requires a minimum basecoat thickness of
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
0.27 mils applied in one coat. An inorganic topcoat with an
Fasteners.
integrated lubricant is applied at a minimum thickness of 0.20
Current edition approved Feb. 1, 2011. Published February 2011. DOI: 10.1520/
F2833–11. mils and an integrated lubricant in one coat; with no additional
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
layers.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3.2.5 Grade 5—requires a minimum basecoat thickness of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 0.27 mils applied in one coat. An organic pigmented topcoat
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F2833−11
TABLE 1 Coating Properties
Grade Topcoat Total number of Average Coating Average Coating Minimum SST
3
type coating layers Thickness (mil) Weight (g/m ) hrs
1 Organic 2 0.47–0.59 32–40 840
2 Organic 3 0.47–0.71 32–51 1200
3
...