Development of electrochemical sensors and their application for characterizing the metal/electrolyte system during localized corrosion

Howard W. Pickering, Konrad G. Weil, Ryan C. Wolfe, Barbara Shaw

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

2 Scopus citations

Abstract

Electrochemical microprobes for in situ monitoring of the electrochemical conditions inside recesses are needed to better understand how localized corrosion and other charge transfer processes occur in confined spaces. The electrode potential distribution can be routinely measured in cavities of > 100 urn opening dimension, but the ability to measure the concentrations of chemical species and their change with time in the presence of potential gradients is only recently becoming possible. Microprobes for pH and chloride ion will be described and results with these sensors will be presented and discussed for creviced iron samples in aqueous electrolytes. Available results reveal that these species change in concentration and distribution with time both during the induction period before crevice corrosion starts and during propagation of crevice corrosion. Preliminary data show that ionic concentrations peak at locations of highest metal dissolution rate on the crevice wall.

Original languageEnglish (US)
Title of host publicationEPD Congress 2004 - Proceedings of the Symposium Sponsored by the Extraction and Processing Division of the Minerals, Metals and Materials Society, TMS
EditorsM.E. Schlesinger
Pages101-116
Number of pages16
StatePublished - 2004
Event2004 TMS Annual Meeting - Charlotte, NC, United States
Duration: Mar 14 2004Mar 18 2004

Other

Other2004 TMS Annual Meeting
CountryUnited States
CityCharlotte, NC
Period3/14/043/18/04

All Science Journal Classification (ASJC) codes

  • Geology
  • Metals and Alloys

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    Pickering, H. W., Weil, K. G., Wolfe, R. C., & Shaw, B. (2004). Development of electrochemical sensors and their application for characterizing the metal/electrolyte system during localized corrosion. In M. E. Schlesinger (Ed.), EPD Congress 2004 - Proceedings of the Symposium Sponsored by the Extraction and Processing Division of the Minerals, Metals and Materials Society, TMS (pp. 101-116)