< div class=" SectionLevel2" > < p class=" subsec1 cdone2" > < span class=" Head3 cdone" > 1.1< / span> & #x00a0 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.

< / div> < div class=" SectionLevel2" > < p class=" subsec1 cdone2" > < span class=" Head3 cdone" > 1.2< / span> & #x00a0 Electroplating of nickel for engineering applications (< span class=" Body-link1 cdone" > Note 1< / span> ) requires technical considerations significantly different from decorative applications because the following functional properties are important:

< div class=" SectionLevel3" > < p class=" subsec2 cdone2" > < span class=" Head4 cdone" > 1.2.1< / span> & #x00a0 Hardness, strength, and ductility,

< / div> < div class=" SectionLevel3" > < p class=" subsec2 cdone2" > < span class=" Head4 cdone" > 1.2.2< / span> & #x00a0 Wear resistance,

< / div> < div class=" SectionLevel3" > < p class=" subsec2 cdone2" > < span class=" Head4 cdone" > 1.2.3< / span> & #x00a0 Load bearing characteristics,

< / div> < div class=" SectionLevel3" > < p class=" subsec2 cdone2" > < span class=" Head4 cdone" > 1.2.4< / span> & #x00a0 Corrosion resistance,

< / div> < div class=" SectionLevel3" > < p class=" subsec2 cdone2" > < span class=" Head4 cdone" > 1.2.5< / span> & #x00a0 Heat scaling resistance,

< / div> < div class=" SectionLevel3" > < p class=" subsec2 cdone2" > < span class=" Head4 cdone" > 1.2.6< / span> & #x00a0 Fretting resistance, and

< / div> < div class=" SectionLevel3" > < p class=" subsec2 cdone2" > < span class=" Head4 cdone" > 1.2.7< / span> & #x00a0 Fatigue resistance.

< div style=" text-align:left " class=" NoteLevel1" >

< span class=" note cdone" style=" text-transform: uppercase " > Note 1:< / span> & #x00a0 < span class=" note cdone" > Functional electroplated nickel coatings usually contain about 99& #8201 % 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 < span class=" Note-link1 cdone" > B832< / span> . 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 < span class=" Note-link1 cdone" > 4< / span> and < span class=" Note-link1 cdone" > Annex A3< / span> . Cobalt salts are sometimes added to the plating solution to produce harder nickel alloy deposits.< / span>

< / div> < / div> < / div> < div class=" SectionLevel2" > < p class=" caveat cdone2" > < span class=" Head3 cdone" > 1.3< / span> & #x00a0 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.

< / div> < div class=" SectionLevel2" > < p class=" WTOcaveat cdone2" > < span class=" Head3 cdone" > 1.4< / span> & #x00a0 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.

< / div>