Microprobe study of pH during the induction period preceding crevice corrosion

Ryan C. Wolfe, Howard W. Pickering, Barbara Shaw

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

Abstract

Potential, pH, and their gradients are important parameters in determining the electrochemical reactivity of metals in crevices. Although a potential drop alone within crevices can be responsible for the activation of crevice corrosion, changes in pH may be necessary for crevice corrosion to occur. In cases where acidification forms an active peak in the polarization curve, pH and potential play synergistic roles in determining the onset of crevice corrosion. This synergistic relationship is explored by measuring gradients in pH and potential within crevices during the induction period preceding crevice corrosion. Crevice corrosion was found to initiate due to the potential drop in the crevice into an active peak in the polarization curve formed by acidification.

Original languageEnglish (US)
Title of host publicationPits and Pores III: Formation, Properties, and Significance for Advanced Materials - Proceedings of the International Symposium
Pages348-358
Number of pages11
VolumePV 2004-19
StatePublished - 2006
Event206th Electrochemical Society Meeting - Honolulu, HI, United States
Duration: Oct 3 2004Oct 8 2004

Other

Other206th Electrochemical Society Meeting
CountryUnited States
CityHonolulu, HI
Period10/3/0410/8/04

Fingerprint

Corrosion
Acidification
Polarization
Chemical activation
Metals

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Wolfe, R. C., Pickering, H. W., & Shaw, B. (2006). Microprobe study of pH during the induction period preceding crevice corrosion. In Pits and Pores III: Formation, Properties, and Significance for Advanced Materials - Proceedings of the International Symposium (Vol. PV 2004-19, pp. 348-358)
Wolfe, Ryan C. ; Pickering, Howard W. ; Shaw, Barbara. / Microprobe study of pH during the induction period preceding crevice corrosion. Pits and Pores III: Formation, Properties, and Significance for Advanced Materials - Proceedings of the International Symposium. Vol. PV 2004-19 2006. pp. 348-358
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Wolfe, RC, Pickering, HW & Shaw, B 2006, Microprobe study of pH during the induction period preceding crevice corrosion. in Pits and Pores III: Formation, Properties, and Significance for Advanced Materials - Proceedings of the International Symposium. vol. PV 2004-19, pp. 348-358, 206th Electrochemical Society Meeting, Honolulu, HI, United States, 10/3/04.

Microprobe study of pH during the induction period preceding crevice corrosion. / Wolfe, Ryan C.; Pickering, Howard W.; Shaw, Barbara.

Pits and Pores III: Formation, Properties, and Significance for Advanced Materials - Proceedings of the International Symposium. Vol. PV 2004-19 2006. p. 348-358.

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

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AB - Potential, pH, and their gradients are important parameters in determining the electrochemical reactivity of metals in crevices. Although a potential drop alone within crevices can be responsible for the activation of crevice corrosion, changes in pH may be necessary for crevice corrosion to occur. In cases where acidification forms an active peak in the polarization curve, pH and potential play synergistic roles in determining the onset of crevice corrosion. This synergistic relationship is explored by measuring gradients in pH and potential within crevices during the induction period preceding crevice corrosion. Crevice corrosion was found to initiate due to the potential drop in the crevice into an active peak in the polarization curve formed by acidification.

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Wolfe RC, Pickering HW, Shaw B. Microprobe study of pH during the induction period preceding crevice corrosion. In Pits and Pores III: Formation, Properties, and Significance for Advanced Materials - Proceedings of the International Symposium. Vol. PV 2004-19. 2006. p. 348-358