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ASTM F2329-05

(Specification)

Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners

Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners

ABSTRACT
This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners applied by the hot-dip coating process. The zinc used for the coating shall conform to the chemical composition required. The following tests shall be made to ensure that the zinc coating is being furnished in accordance with this specification: coating thickness; finish and appearance; embrittlement test; and adhesion test.
SCOPE
1.1 This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners applied by the hot-dip coating process. Nails and rivets are not included in this specification.
1.2 It is intended to be applicable to fasteners that are centrifuged or otherwise handled to remove excess galvanizing bath metal (free zinc).
1.3 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-2005
ICS
25.220.40 - Metallic coatings
Technical Committee
F16 - Fasteners
Drafting Committee
F16.03 - Coatings on Fasteners
Current Stage
Ref Project

Relations

Replaced By
ASTM F2329-05(2011) - Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
Effective Date
01-May-2011
Referred By
ASTM A449-14(2020) - Standard Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength, General Use
Effective Date
01-Feb-2005
Referred By
ASTM F436/F436M-19 - Standard Specification for Hardened Steel Washers Inch and Metric Dimensions
Effective Date
01-Feb-2005
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-2005
Referred By
ASTM A394-08(2015) - Standard Specification for Steel Transmission Tower Bolts, Zinc-Coated and Bare
Effective Date
01-Feb-2005

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ASTM F2329-05 - Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded FastenersASTM F2329-05 - Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
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ASTM F2329-05 - Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
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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: F2329 – 05
Standard Specification for
Zinc Coating, Hot-Dip, Requirements for Application to
Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and
1
Special Threaded Fasteners
This standard is issued under the fixed designation F2329; 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 requirements for hot-dip
F1789 Terminology for F16 Mechanical Fasteners
zinc coating applied to carbon steel and alloy steel bolts,
screws, washers, nuts, and special threaded fasteners applied
3. Terminology
by the hot-dip coating process. Nails and rivets are not
3.1 Terms used in this specification are defined in Termi-
included in this specification.
nology F1789 unless otherwise defined in this specification.
1.2 It is intended to be applicable to fasteners that are
3.1.1 batchlot—quantity of identical parts cleaned, pickled,
centrifuged or otherwise handled to remove excess galvanizing
fluxed, and galvanized together at one time in a galvanizing
bath metal (free zinc).
basket.
1.3 This standard does not purport to address all of the
3.1.2 galvanizing—hot-dip zinc coating.
safety concerns, if any, associated with its use. It is the
3.1.3 high temperature galvanizing—galvanizing process
responsibility of the user of this standard to establish appro-
carried out in a ceramic vessel (kettle) at an approximate
priate safety and health practices and determine the applica-
temperature ranging between 990 and 1040°F.
bility of regulatory limitations prior to use.
3.1.4 hot-dip zinc coating of mechanical fasteners—process
2. Referenced Documents whereby fasteners are zinc coated by immersion in a bath of
2
molten zinc, resulting in the formation of the iron/zinc alloy
2.1 ASTM Standards:
coating and a zinc coating at the surface of the fastener. This
A153/A153M Specification for Zinc Coating (Hot-Dip) on
process involves the removal of excess zinc by spinning the
Iron and Steel Hardware
parts in a centrifuge, or brushing the threaded portion, or
A563 Specification for Carbon and Alloy Steel Nuts
handling otherwise to remove the excess zinc.
B487 Test Method for Measurement of Metal and Oxide
3.1.5 production lot—batches of parts originating from the
CoatingThicknessbyMicroscopicalExaminationofCross
samemanufacturinglot,processedcontinuouslythroughclean-
Section
ing, pickling, fluxing, dipping in molten zinc and spun in a
E376 Practice for Measuring Coating Thickness by
centrifuge, or other means, without any significant change in
Magnetic-FieldorEddy-Current(Electromagnetic)Exami-
time, temperature, and concentration of the constituents of the
nation Methods
process.
F606 Test Methods for Determining the Mechanical Prop-
3.1.6 stress relief—process of heating parts for a definite
erties of Externally and Internally Threaded Fasteners,
timeatagiventemperatureinordertorelievestressinducedby
Washers, Direct Tension Indicators, and Rivets
work hardening.
1
4. Ordering Information
This specification is under the jurisdiction of ASTM Committee F16 on
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
4.1 Orders for zinc coating of fasteners to this specification
Fasteners.
shall include the following:
Current edition approved Feb. 1, 2005. Published February 2005. DOI: 10.1520/
F2329-05. 4.1.1 Name of product (that is bolt, stud, nut, washers, or
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
other);
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4.1.2 ASTM designation and year of issue, including fas-
Standards volume information, refer to the standard’s Document Summary page on
tener specification number;
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F2329 – 05
are established by the applicable product standard, such as Specification
4.1.3 Hydrogen embrittlement relief, as required by the
A563 (or others), or in writing by the purchaser, if needed.
purchaser see, 7.2.3;
4.1.4 Quantity of fasteners to be hot-dip zinc coated;
5.5 Secondary Processing:
4.1.5 Stress relief or tempering temperature to which the
5.5.1 When requested by the purchaser, treatments such as
fasteners where subjected, if applicable;
chromating or phosphating shall be applied to reduce the
4.1.6 Secondary processing such as chromating, phosphat-
possibility of wet storage staining (white
...

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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).  
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4.1 The specialized use of the electroplating process for electroforming results in the manufacture of tools and products that are unique and often impossible to make economically by traditional methods of fabrication. Current applications of nickel electroforming include: textile printing screens; components of rocket thrust chambers, nozzles, and motor cases; molds and dies for making automotive arm-rests and instrument panels; stampers for making phonograph records, video-discs, and audio compact discs; mesh products for making porous battery electrodes, filters, and razor screens; and optical parts, bellows, and radar wave guides (1-3).3  
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4.3 Electroforming is used whenever the difficulty and cost of producing the object by mechanical means is unusually high; unusual mechanical and physical properties are required in the finished piece; extremely close dimensional tolerances must be held on internal dimensions and on surfaces of irregular contour; very fine reproduction of detail and complex combinations of surface finish are required; and the part cannot be made by other available methods.
SCOPE
1.1 This guide covers electroforming practice and describes the processing of mandrels, the design of electroformed articles, and the use of copper and nickel electroplating solutions for electroforming.  
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This specification establishes the requirements for electrodeposited copper coatings used for engineering purposes including surface hardening, heat treatment stop-off, as an underplate for other engineering coatings, for electromagnetic interference shielding in electronic circuitry, and in certain joining operations. This specification does not cover electrodeposited copper used as a decorative finish, as an undercoat for other decorative finishes, or for electroforming. Coatings shall be classified according to thickness. Metal parts shall undergo pre- and post-coating treatment for reducing the risk of hydrogen embrittlement, and peening. Coatings shall be sampled, tested, and shall conform to specified requirements as to appearance, thickness, porosity, solderability, adhesion, embrittlement relief, and packaging.
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1.1 This specification covers requirements for electrodeposited coatings of copper used for engineering purposes. Examples include surface hardening, heat treatment stop-off, as an underplate for other engineering coatings, for electromagnetic interferences (EMI) shielding in electronic circuitry, and in certain joining operations.  
1.2 This specification is not intended for electrodeposited copper when used as a decorative finish, or as an undercoat for other decorative finishes.  
1.3 This specification is not intended for electrodeposited copper when used for electroforming.  
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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ASTM B556-90(2023)(Guide)
Standard Guide for Measurement of Thin Chromium Coatings by Spot Test

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4.1 The thickness of a decorative chromium coating is often critical to its performance.  
4.2 This procedure is useful for an approximate determination when the best possible accuracy is not required. For more reliable determinations, the following methods are available: Methods B504, B568, and B588.  
4.3 This test assumes that the rate of dissolution of the chromium by the hydrochloric acid under the specified conditions is always the same.
SCOPE
1.1 This guide covers the use of the spot test for the measurement of thicknesses of electrodeposited chromium coatings over nickel and stainless steel with an accuracy of about ±20 % (Section 9). It is applicable to thicknesses up to 1.2 μm.2
Note 1: Although this test can be used for coating thicknesses up to 1.2 μm, there is evidence that the results obtained by this method are high at thicknesses greater than 0.5 μm.3 In addition, for coating thicknesses above 0.5 μm, it is advisable to use a double drop of acid to prevent depletion of the test solution before completion of the test.  
1.2 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.  
1.3 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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ASTM B867-95(2023)(Specification)
Standard Specification for Electrodeposited Coatings of Palladium-Nickel for Engineering Use

ABSTRACT
This specification establishes the requirements for electrodeposited palladium-nickel (Pd-Ni) coatings for engineering applications. Composite coatings consisting of palladium-nickel and a thin gold over-plate for applications involving electrical contacts are also covered. The classification system for the coatings covered here shall be specified by the basis metal, the thickness of the underplating, the composition type and thickness class of the palladium-nickel coating, and the grade of the gold overplating. Coatings should be sampled, tested, and conform to specified requirements as to purity, appearance, thickness, composition, adhesion, ductility, and integrity (including gross defects, mechanical damage, porosity, and microcracks). Alloy composition shall be examined either by wet method, X-ray fluorescence (XRF), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Auger or electron probe X-ray microanalysis (EPMA), or wavelength dispersive spectroscopy (WDS). Coating adhesion shall be analyzed either by bend, heat, or cutting test.
SCOPE
1.1 Composition—This specification covers requirements for electrodeposited palladium-nickel coatings containing between 70 and 95 mass % of palladium metal. Composite coatings consisting of palladium-nickel and a thin gold overplate for applications involving electrical contacts are also covered.  
1.2 Properties—Palladium is the lightest and least noble of the platinum group metals. Palladium-nickel is a solid solution alloy of palladium and nickel. Electroplated palladium-nickel alloys have a density between 10 and 11.5, which is substantially less than electroplated gold (17.0 to 19.3) and comparable to electroplated pure palladium (10.5 to 11.8). This yields a greater volume or thickness of coating per unit mass and, consequently, some saving of metal weight. The hardness range of electrodeposited palladium-nickel compares favorably with electroplated noble metals and their alloys (1, 2).2  
Note 1: Electroplated deposits generally have a lower density than their wrought metal counterparts.
Approximate Hardness (HK25)  
Gold  
50–250  
Palladium  
75–600  
Platinum  
150–550  
Palladium-Nickel  
300–650  
Rhodium  
750–1100  
Ruthenium  
600–1300  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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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