ASTM B679-98(2015)

Standard Specification for Electrodeposited Coatings of Palladium for Engineering Use

ABSTRACT
This specification establishes the requirements for electrodeposited palladium coatings for use in engineering applications. This specification also covers composite coatings of palladium with a thin gold overplate for applications involving electrical contacts. The plating system shall indicate the basis metal involved, thickness of the underplates, thickness of the palladium coating, and grade of the gold overplate. Coatings shall be sampled, tested, and conform accordingly to specified requirements as to purity, appearance, thickness, dutility, adhesion (to be examined either by bend, heat, or cutting test), and integrity (gross defects, mechanical damage, and porosity).
SCOPE
1.1 This specification covers requirements for electrodeposited palladium coatings containing at least 99.7 mass % of palladium metal. Composite coatings consisting of palladium with 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. It has a specific gravity of 12.0, which is substantially less than gold (19.3) and platinum (21.5). This yields a greater volume or thickness of coating and, consequently, some saving of metal weight accompanied by a small sacrifice in corrosion resistance and reflectivity. The following table compares the hardness range of electrodeposited palladium with other electrodeposited noble metals and alloys (1,2).2    
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 the preferred values. Values provided 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Oct-2015
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.04 - Precious Metal Coatings

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:B679 −98 (Reapproved 2015)
Standard Specification for
Electrodeposited Coatings of Palladium for Engineering
1
Use
This standard is issued under the fixed designation B679; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
1.1 Thisspecificationcoversrequirementsforelectrodepos- 2.1 Thefollowingstandardsformapartofthisspecification
ited palladium coatings containing at least 99.7 mass % of to the extent referenced herein:
palladium metal. Composite coatings consisting of palladium 3
2.2 ASTM Standards:
with a thin gold overplate for applications involving electrical
B183Practice for Preparation of Low-Carbon Steel for
contacts are also covered.
Electroplating
1.2 Properties—Palladium is the lightest and least noble of B242Guide for Preparation of High-Carbon Steel for Elec-
the platinum group metals. It has a specific gravity of 12.0, troplating
which is substantially less than gold (19.3) and platinum B254Practice for Preparation of and Electroplating on
(21.5). This yields a greater volume or thickness of coating Stainless Steel
and, consequently, some saving of metal weight accompanied B281Practice for Preparation of Copper and Copper-Base
byasmallsacrificeincorrosionresistanceandreflectivity.The Alloys for Electroplating and Conversion Coatings
following table compares the hardness range of electrodepos- B322Guide for Cleaning Metals Prior to Electroplating
ited palladium with other electrodeposited noble metals and B343Practice for Preparation of Nickel for Electroplating
2
alloys (1,2). with Nickel
B374Terminology Relating to Electroplating
Approximate Hardness (HK )
25
Gold 50–250
B481Practice for Preparation of Titanium and Titanium
Palladium 75–600
Alloys for Electroplating
Platinum 150–550
B482Practice for Preparation of Tungsten and Tungsten
Palladium-Nickel 300–650
Rhodium 750–1100
Alloys for Electroplating
Ruthenium 600–1300
B487Test Method for Measurement of Metal and Oxide
1.3 The values stated in SI units are the preferred values.
Coating Thickness by Microscopical Examination of
Values provided in parentheses are for information only.
Cross Section
B488Specification for Electrodeposited Coatings of Gold
1.4 This standard does not purport to address all of the
for Engineering Uses
safety concerns, if any, associated with its use. It is the
B489Practice for Bend Test for Ductility of Electrodepos-
responsibility of the user of this standard to establish appro-
ited and Autocatalytically Deposited Metal Coatings on
priate safety and health practices and determine the applica-
Metals
bility of regulatory limitations prior to use.
B499Test Method for Measurement of CoatingThicknesses
by the Magnetic Method: Nonmagnetic Coatings on
1
This specification is under the jurisdiction of ASTM Committee B08 on
Magnetic Basis Metals
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
B08.04 on Precious Metal Coatings.
Current edition approved Nov. 1, 2015. Published December 2015. Originally
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approvedin1980.Lastpreviouseditionapprovedin2009asB679–98(2009).DOI:
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
10.1520/B0679-98R15.
2
Standards volume information, refer to the standard’s Document Summary page on
Theboldfacenumbersinparenthesesrefertothelistofreferencesattheendof
the ASTM website.
this specification.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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B679−98 (2015)
A
TABLE 1 Thickness Class
B507Practice for Design ofArticles to Be Electroplated on
Thickness Class Minimum Thickness of Pd (µm)
Racks
0.08 0.08
B542Terminology Relating to Electrical Contacts andTheir
0.15 0.15
Use
0.25 0.25
B558Practice for Preparation of Nickel Alloys for Electro-
0.50 0.50
0.75 0.75
plating
1.00 1.00
B567Test Method for Measurement of Coating Thickness
1.25 1.25
by the Beta Backscatter Method
1.5 1.5
2.5 2.5
B568Test Method for Measurement of Coating Thickness
3.0 3.0
by X-Ray Spectrometry
5.0 5.0
B571Practice for Qualitative Adhesion Testing of Metallic
A
See Appendix X4 for specific applications of the various thickness classes.
Coatings
B602Test Method for Attribute Sampling of Metallic and
A
Inorganic Coatings
TABLE 2 Gold Overplate
B689Specification for Electroplated Engineering Nickel
Thickness
Grade Type MIL-G-45204 Hardness (Code)
Coatings Range
0 No Overplate . . . . . . . . .
B697Guide for Selection of Sampling Plans
...

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: B679 − 98 (Reapproved 2009) B679 − 98 (Reapproved 2015)
Standard Specification for
Electrodeposited Coatings of Palladium for Engineering
1
Use
This standard is issued under the fixed designation B679; 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 requirements for electrodeposited palladium coatings containing at least 99.7 mass % of palladium
metal. Composite coatings consisting of palladium with 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. It has a specific gravity of 12.0, which
is substantially less than gold (19.3) and platinum (21.5). This yields a greater volume or thickness of coating and, consequently,
some saving of metal weight accompanied by a small sacrifice in corrosion resistance and reflectivity. The following table
2
compares the hardness range of electrodeposited palladium with other electrodeposited noble metals and alloys (1,2).
Approximate Hardness (HK )
25
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 the preferred values. Values provided 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 The following standards form a part of this specification to the extent referenced herein:
3
2.2 ASTM Standards:
B183 Practice for Preparation of Low-Carbon Steel for Electroplating
B242 Guide for Preparation of High-Carbon Steel for Electroplating
B254 Practice for Preparation of and Electroplating on Stainless Steel
B281 Practice for Preparation of Copper and Copper-Base Alloys for Electroplating and Conversion Coatings
B322 Guide for Cleaning Metals Prior to Electroplating
B343 Practice for Preparation of Nickel for Electroplating with Nickel
B374 Terminology Relating to Electroplating
B481 Practice for Preparation of Titanium and Titanium Alloys for Electroplating
B482 Practice for Preparation of Tungsten and Tungsten Alloys for Electroplating
B487 Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section
B488 Specification for Electrodeposited Coatings of Gold for Engineering Uses
B489 Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals
1
This specification is under the jurisdiction of ASTM Committee B08 on Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee B08.04 on
Precious Metal Coatings.
Current edition approved Sept. 1, 2009Nov. 1, 2015. Published November 2009December 2015. Originally approved in 1980. Last previous edition approved in 20042009
ε1
as B679 – 98(2004)(2009). . DOI: 10.1520/B0679-98R09.10.1520/B0679-98R15.
2
The boldface numbers in parentheses refer to the list of references at the end of this specification.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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

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B679 − 98 (2015)
B499 Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis
Metals
B507 Practice for Design of Articles to Be Electroplated on Racks
B542 Terminology Relating to Electrical Contacts and Their Use
B558 Practice for Preparation of Nickel Alloys for Electroplating
B567 Test Method for Measurement of Coating Thickness by the Beta Backscatter Method
B568 Test Method for Measurement of Coating Thickness by X-Ray Spectrometry
B571 Practice for Qualitative Adhesion Testing of Metallic Coatings
B602 Test Method for Attribute Sampling of Metallic and Inorganic Coatings
B689 Specification for Electroplated
...