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Description of ASTM-B689 2013ASTM B689-97-Reapproved2013Historical Standard: Standard Specification for Electroplated Engineering Nickel CoatingsASTM B689Scope 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 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.
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. Keywords ICS Code ICS Number Code 25.220.40 (Metallic coatings) DOI: 10.1520/B0689-97R13 This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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