Standard Specification for Electroplated Engineering Nickel Coatings

SCOPE
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,
1.2.3 Load bearing characteristics,
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 B 832. 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.
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.

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ASTM B689-97(2003) - Standard Specification for Electroplated Engineering Nickel Coatings
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B 689 – 97 (Reapproved 2003)
Standard Specification for
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Electroplated Engineering Nickel Coatings
This standard is issued under the fixed designation B 689; 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. Scope B 183 Practice for Preparation of Low-Carbon Steel for
2
Electroplating
1.1 This specification covers the requirements for electro-
B 242 Practice for Preparation of High-Carbon Steel for
plated nickel coatings applied to metal products for engineer-
2
Electroplating
ing applications, for example, for use as a buildup for misma-
B 252 Guide for Preparation of ZincAlloy Die Castings for
chined or worn parts, for electronic applications, including as
2
Electroplating and Conversion Coatings
underplates in contacts or interconnections, and in certain
B 253 Guide for Preparation ofAluminumAlloys for Elec-
joining applications.
2
troplating
1.2 Electroplating of nickel for engineering applications
B 254 Practice for Preparation of and Electroplating on
(Note 1) requires technical considerations significantly differ-
2
Stainless Steel
ent from decorative applications because the following func-
B 281 Practice for Preparation of Copper and Copper-Base
tional properties are important:
2
Alloys for Electroplating and Conversion Coatings
1.2.1 Hardness, strength, and ductility,
B 320 Practice for Preparation of Iron Castings for Electro-
1.2.2 Wear resistance,
2
plating
1.2.3 Load bearing characteristics,
2
B 322 Practice for Cleaning Metals Prior to Electroplating
1.2.4 Corrosion resistance,
B 343 Practice for Preparation of Nickel for Electroplating
1.2.5 Heat scaling resistance,
2
with Nickel
1.2.6 Fretting resistance, and
2
B 374 Terminology Relating to Electroplating
1.2.7 Fatigue resistance.
B 480 GuideforPreparationofMagnesiumandMagnesium
2
NOTE 1—Functionalelectroplatednickelcoatingsusuallycontainabout
Alloys for Electroplating
99 % nickel, and are most frequently electrodeposited from aWatts nickel
B 487 Test Method for Measurement of Metal and Oxide
bath or a nickel sulfamate bath. Typical mechanical properties of nickel
Coating Thickness by Microscopical Examination of a
electroplated from these baths, and the combined effect of bath operation
2
Cross Section
and solution composition variables on the mechanical properties of the
electrodeposit are given in Guide B 832. When electroplated nickel is B 499 Test Method for Measurement of Coating Thick-
required to have higher hardnesses, greater wear resistance, certain
nessesbytheMagneticMethod:NonmagneticCoatingson
2
residual stress values and certain leveling characteristics, sulfur and other
Magnetic Basis Metals
substancesareincorporatedinthenickeldepositthroughtheuseofcertain
B 507 PracticeforDesignofArticlestoBeElectroplatedon
addition agents in the electroplating solution. For the effect of such
2
Racks
additives, see Section 4 andAnnexA3. Cobalt salts are sometimes added
B 530 Test Method for Measurement of Coating Thick-
to the plating solution to produce harder nickel alloy deposits.
nesses by the Magnetic Method: Electrodeposited Nickel
1.3 This standard does not purport to address all of the
2
Coatings on Magnetic and Nonmagnetic Substrates
safety concerns, if any, associated with its use. It is the
B 558 Practice for Preparation of NickelAlloys for Electro-
responsibility of the user of this standard to establish appro-
2
plating
priate safety and health practices and determine the applica-
B 568 Test Method for Measurement of Coating Thickness
bility of regulatory limitations prior to use.
2
by X-Ray Spectrometry
B 571 Practice for QualitativeAdhesion Testing of Metallic
2. Referenced Documents
2
Coatings
2.1 ASTM Standards:
B 602 Test Method for Attribute Sampling of Metallic and
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Inorganic Coatings
1
This specification is under the jurisdiction of ASTM Committee B08 on
B 697 Guide for Selection of Sampling Plans for Inspection
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
B08.08.01 on Engineering Coatings.
Current edition approved Feb. 10, 2003. Published May 2003. Originally
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approved in 1981. Last previous edition approved in 1997 as B 689 – 97. Annual Book of ASTM Standards, Vol 02.05.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B 689 – 97 (2003)
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of Electrodeposited Metallic and Inorganic Coatings 4.1.3 Type 3—Electrodepositednickelcontainingdispersed
B 762 Test
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