Documented evidence of significant metal loss in aluminum crevice corrosion

B. S. Deforce, B. A. Shaw

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

Abstract

Crevice corrosion of aluminum has been studied extensively and several explanations of the mechanism have been proposed. However, evidence of significant metal loss due to aluminum crevice corrosion is not well documented. This paper shows evidence of significant corrosion of aluminum within a crevice. The crevice corrosion of high purity aluminum (99.999 wt. % Al) in neutral and mildly acidic solutions was investigated. Polarization curves were generated in simulated crevice solutions and potentiostatic crevice corrosion experiments with varying crevice gap opening dimensions were performed. Current was measured and in situ photographs of the developing crevice corrosion were obtained. Crevice corrosion of aluminum in a pH 6, 0.6M NaCI solution was not found to occur under open circuit or polarized conditions. Crevice corrosion was observed for aluminum in a mildly acidic (pH 3), chloride free solution. In this solution, crevice corrosion resulting in severe material loss was observed and a high current (10 mA) was measured. The corrosion occurred in the absence of pitting corrosion. The cause of corrosion in this case could be explained by alkalization of the crevice due to a high rate of hydrogen evolution reaction, driven by a potential drop within the crevice.

Original languageEnglish (US)
Title of host publicationNACE International - Corrosion Conference and Expo 2016
PublisherNational Assoc. of Corrosion Engineers International
Pages803-818
Number of pages16
ISBN (Electronic)9781510821354
StatePublished - Jan 1 2016
EventCorrosion 2016 - Vancouver, Canada
Duration: Mar 6 2016Mar 10 2016

Publication series

NameNACE - International Corrosion Conference Series
Volume1
ISSN (Print)0361-4409

Other

OtherCorrosion 2016
CountryCanada
CityVancouver
Period3/6/163/10/16

Fingerprint

Aluminum corrosion
Metals
Corrosion
Aluminum
Pitting
Chlorides
Hydrogen

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

Cite this

Deforce, B. S., & Shaw, B. A. (2016). Documented evidence of significant metal loss in aluminum crevice corrosion. In NACE International - Corrosion Conference and Expo 2016 (pp. 803-818). (NACE - International Corrosion Conference Series; Vol. 1). National Assoc. of Corrosion Engineers International.
Deforce, B. S. ; Shaw, B. A. / Documented evidence of significant metal loss in aluminum crevice corrosion. NACE International - Corrosion Conference and Expo 2016. National Assoc. of Corrosion Engineers International, 2016. pp. 803-818 (NACE - International Corrosion Conference Series).
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Deforce, BS & Shaw, BA 2016, Documented evidence of significant metal loss in aluminum crevice corrosion. in NACE International - Corrosion Conference and Expo 2016. NACE - International Corrosion Conference Series, vol. 1, National Assoc. of Corrosion Engineers International, pp. 803-818, Corrosion 2016, Vancouver, Canada, 3/6/16.

Documented evidence of significant metal loss in aluminum crevice corrosion. / Deforce, B. S.; Shaw, B. A.

NACE International - Corrosion Conference and Expo 2016. National Assoc. of Corrosion Engineers International, 2016. p. 803-818 (NACE - International Corrosion Conference Series; Vol. 1).

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

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Deforce BS, Shaw BA. Documented evidence of significant metal loss in aluminum crevice corrosion. In NACE International - Corrosion Conference and Expo 2016. National Assoc. of Corrosion Engineers International. 2016. p. 803-818. (NACE - International Corrosion Conference Series).