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ASTM B488-01e1

(Specification)

Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses

Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses

SCOPE
1.1 This specification covers requirements for electrodeposited gold coatings that contain not less than 99.00 mass % gold and that are used for engineering applications.
1.2 Specifically excluded from this specification are autocatalytic, immersion, and vapor deposited gold coatings.
1.3 Gold coatings conforming to this specification are employed for their corrosion and tarnish resistance (including resistance to fretting corrosion and catalytic polymerization), bondability, low and stable contact resistance, solderability, and infrared reflectivity. Several types of coatings, differing in gold purity and hardness, are covered by this specification.
1.4 The values stated in SI units are to be regarded as the standard. Values provided in parentheses are for information only.
1.5 The following hazards caveat pertains only to the test methods section, Section 9, 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
09-Oct-2001
ICS
25.220.40 - Metallic coatings
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.04 - Precious Metal Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM B488-01 - Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses
Effective Date
10-Oct-2001
Replaced By
ASTM B488-01(2006) - Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses
Effective Date
01-Apr-2006
Referred By
ASTM B679-98(2021) - Standard Specification for Electrodeposited Coatings of Palladium for Engineering Use
Effective Date
10-Oct-2001
Referred By
ASTM B984-12(2020)e1 - Standard Specification for Electrodeposited Coatings of Palladium-Cobalt Alloy for Engineering Use
Effective Date
10-Oct-2001
Referred By
ASTM B867-95(2018) - Standard Specification for Electrodeposited Coatings of Palladium-Nickel for Engineering Use
Effective Date
10-Oct-2001
Referred By
ASTM B866-95(2018) - Standard Test Method for Gross Defects and Mechanical Damage in Metallic Coatings by Polysulfide Immersion
Effective Date
10-Oct-2001
Referred By
ASTM B877-96(2018) - Standard Test Method for Gross Defects and Mechanical Damage in Metallic Coatings by the Phosphomolybdic Acid (PMA) Method
Effective Date
10-Oct-2001

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ASTM B488-01e1 - Standard Specification for Electrodeposited Coatings of Gold for Engineering UsesASTM B488-01e1 - Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses
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ASTM B488-01e1 - Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses
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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
e1
Designation: B 488 – 01
Standard Specification for
1
Electrodeposited Coatings of Gold for Engineering Uses
This standard is issued under the fixed designation B 488; 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.
This standard has been approved for use by agencies of the Department of Defense.
1
e NOTE—Appendix X1 was editorially updated in July 2005.
1. Scope B 254 Practice for Preparation of and Electroplating on
Stainless Steel
1.1 This specification covers requirements for electrodepos-
B 281 Practice for Preparation of Copper and Copper Base
ited gold coatings that contain not less than 99.00 mass % gold
Alloys for Electroplating and Conversion Coatings
and that are used for engineering applications.
B 322 Practice for Cleaning Metals Prior to Electroplating
1.2 Specifically excluded from this specification are auto-
B 343 Practice for Preparation of Nickel for Electroplating
catalytic, immersion, and vapor deposited gold coatings.
with Nickel
1.3 Gold coatings conforming to this specification are em-
B 374 Terminology Relating to Electroplating
ployed for their corrosion and tarnish resistance (including
B 481 Practice for Preparation of Titanium and Titanium
resistance to fretting corrosion and catalytic polymerization),
Alloys for Electroplating
bondability, low and stable contact resistance, solderability,
B 482 Practice for Preparation of Tungsten and Tungsten
and infrared reflectivity. Several types of coatings, differing in
Alloys for Electroplating
gold purity and hardness, are covered by this specification.
B 487 Test Method for Measurement of Metal and Oxide
1.4 The values stated in SI units are to be regarded as the
Coating Thicknesses by Microscopical Examination of a
standard. Values provided in parentheses are for information
Cross Section
only.
B 489 Practice for Bend Test for Ductility of Electrodepos-
1.5 The following hazards caveat pertains only to the test
ited and Autocatalytically Deposited Metal Coatings on
methods section, Section 9, of this specification: This standard
Metals
does not purport to address all of the safety concerns, if any,
B 499 Test Method for Measurement of Coating Thick-
associated with its use. It is the responsibility of the user of this
nessesbytheMagneticMethod:NonmagneticCoatingson
standard to establish appropriate safety and health practices
Magnetic Basis Metals
and determine the applicability of regulatory limitations prior
B 504 Test Method for Measurement of Thickness of Me-
to use.
tallic Coatings by the Coulometric Method
2. Referenced Documents
B 507 PracticeforDesignofArticlestoBeElectroplatedon
2
Racks
2.1 ASTM Standards:
B 542 Terminology Relating to Electrical Contacts and
B 32 Specification for Solder Metal
Their Use
B 183 Practice for Preparation of Low-Carbon Steel for
B 558 Practice for Preparation of NickelAlloys for Electro-
Electroplating
plating
B 242 Practice for Preparation of High-Carbon Steel for
B 567 Test Method for Measurement of Coating Thickness
Electroplating
by the Beta Backscatter Method
B 253 Guide for Preparation ofAluminumAlloys for Elec-
B 568 Test Method for Measurement of Coating Thickness
troplating
by X-Ray Spectrometry
B 571 Test Methods for Adhesion of Metallic Coatings
1
This specification is under the jurisdiction of ASTM Committee B08 on
B 578 Test Method for Microhardness of Electroplated
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
Coatings
B08.08 on Engineering Coatings.
B 602 Test Method for Attribute Sampling of Metallic and
Current edition approved Oct. 10, 2001. Published October 2001. Originally
approved in 1968. Last previous edition approved in 1995 as B 488 – 95.
Inorganic Coatings
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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 ----------------------
e1
B488–01
B 678 Test Method for Solderability of Metallic Coated 4.1.2 Code, designating Knoop hardness in accordance with
Products 4.2.3, and
B 697 Guide for Selection of Sampling Plans for Inspection 4.1.3 a numeral designating thickness in micrometres in
of Electrodeposited Metallic and Inorganic Coatings accordance with 4.3.
B 735 Test Method for Porosity in Gold Coatings on Metal 4.2 Purity and Hardness:
Substrates by Nitric Acid Vapor 4.2.1 Purity—The issue of
...

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Rhodium  
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Ruthenium  
600–1300  
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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.  
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This specification covers the requirements for electroplated nickel coatings applied to metal products for engineering applications (for example, for use as a buildup for mismachined or worn parts), for electronics applications (including as underplates in contacts or interconnections), and in certain joining applications. Coatings shall be available in any one of the following types: Type 1, coatings electroplated from solutions not containing hardeners, brighteners, or stress control additives; Type 2, electrodeposits used at moderate temperatures, and contain sulfur or other codeposited elements or compounds that are present to increase the hardness, refine grain structure, or control internal stress; and Type 3, electroplates containing dispersed submicron particles such as silicon carbide, tungsten carbide, and aluminum oxide that are present to increase hardness and wear resistance at specified temperatures. Metal parts shall undergo pre- and post-coating treatments to reduce the risk of hydrogen embrittlement, and peening. Coatings shall be sampled, tested, and conform accordingly to specified requirements as to appearance, thickness (measured either destructively by microscopical or coulometric method, or nondestructively by magnetic or X-ray method), adhesion (examined either by bend, file, heat and quench, or push test), porosity (assessed either by hot water, ferroxyl, or flowers of sulfur test), workmanship, and hydrogen embrittlement relief.
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1.1 This specification covers the requirements for electroplated nickel coatings applied to metal products for engineering applications, for example, for use as a buildup for mismachined or worn parts, for electronic applications, including as underplates in contacts or interconnections, and in certain joining applications.  
1.2 Electroplating of nickel for engineering applications (Note 1) requires technical considerations significantly different from decorative applications because the following functional properties are important:  
1.2.1 Hardness, strength, and ductility,  
1.2.2 Wear resistance,  
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1.2.4 Corrosion resistance,  
1.2.5 Heat scaling resistance,  
1.2.6 Fretting resistance, and  
1.2.7 Fatigue resistance.  
Note 1: Functional electroplated nickel coatings usually contain about 99 % nickel, and are most frequently electrodeposited from a Watts nickel bath or a nickel sulfamate bath. Typical mechanical properties of nickel electroplated from these baths, and the combined effect of bath operation and solution composition variables on the mechanical properties of the electrodeposit are given in Guide B832. When electroplated nickel is required to have higher hardnesses, greater wear resistance, certain residual stress values and certain leveling characteristics, sulfur and other substances are incorporated in the nickel deposit through the use of certain addition agents in the electroplating solution. For the effect of such additives, see Section 4 and Annex A3. Cobalt salts are sometimes added to the plating solution to produce harder nickel alloy deposits.  
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4.1 The routine measurement of the ductility of electrodeposited and autocatalytically deposited metal coatings can be useful in process control, especially when the electroplating process is used for decorative and engineering purposes.
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1.1 This practice covers a test procedure for determining the ductility of electrodeposited and autocatalytically deposited coatings on sheet or strip basis metals. The purpose of the test is to determine the resistance of metal coatings to cracking during distortion.2  
1.2 Test Methods E8 can be used if the coatings are too ductile and require mandrels too small to be practical.  
1.3 The values stated in SI 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, 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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