The role of nodules in the growth of Zn whiskers from alkaline cyanide-free Zn electrodeposits

L. Wu, M. A. Ashworth, G. D. Wilcox

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

1 Citation (Scopus)
11 Downloads (Pure)

Abstract

Electroplated zinc finishes have been widely used in the packaging of electronic products for many years as a result of their excellent corrosion resistance and relatively low cost. However, the spontaneous formation of whiskers on zinc electroplated components, which are capable of resulting in electrical shorting or other damaging effects, can be highly problematic for the reliability of long life electrical and electronic equipment. The current work investigated whisker growth from commercial alkaline cyanide-free zinc electrodeposits on mild steel substrates. The presence of nodules on the deposit surface significantly reduced the incubation time for whisker growth in comparison with that from planar regions of the deposit. The nodules were probably formed due to the built-in residual stress within the electrodeposit during deposition. The nodules were eliminated by grinding the surface of the steel prior to Zn deposition. However, in the absence of the nodules the incubation time for whisker growth was reduced compared with that from the as-received surface.

Original languageEnglish
Title of host publicationElectrochemical Engineering General Session
PublisherElectrochemical Society Inc.
Pages1-9
Number of pages9
Volume66
Edition21
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventSymposium on Electrochemical Engineering General Session - 227th ECS Meeting - Chicago, United States
Duration: 24 May 201528 May 2015

Conference

ConferenceSymposium on Electrochemical Engineering General Session - 227th ECS Meeting
CountryUnited States
CityChicago
Period24/05/1528/05/15

ASJC Scopus subject areas

  • Engineering(all)

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    Wu, L., Ashworth, M. A., & Wilcox, G. D. (2015). The role of nodules in the growth of Zn whiskers from alkaline cyanide-free Zn electrodeposits. In Electrochemical Engineering General Session (21 ed., Vol. 66, pp. 1-9). Electrochemical Society Inc.. https://doi.org/10.1149/06621.0001ecst