Depassivation and repassivation of titanium under particle impingements

E. Akiyama, K. Tsuzaki

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Current transients of a titanium microelectrode corresponding to an impingement of a single zirconia particle were measured in a buffer solution. It was found that the repassivation after a particle impact followed high field model of oxide growth. The apparent repassivation rate evaluated by the relation between the charge and the peak height of a current transient showed dependence on applied potential, and the apparent repassivation rate increased with increase of potential. The influence of potential applied passivation prior to particle impingement on the apparent repassivation rate was more predominant than that of the potential applied during impingement of relatively large particle. This indicates that the apparent repassivation rate does not represent the actual repassivation kinetics. It is suggested that the passive film formed prior to a particle impact and repassivation give rise to resistance against surface deformation and film breakdown, and that it affects the apparent repassivation behavior. copyright The Electrochemical Society.

Original languageEnglish
Title of host publicationCorrosion and Electrochemistry of Advanced Materials, In Honor of Koji Hashimoto
PublisherElectrochemical Society Inc.
Number of pages10
ISBN (Electronic)1566774977
ISBN (Print)1566774977, 9781566774970
Publication statusPublished - 2006
Event208th Meeting of the Electrochemical Society - Los Angeles, CA, United States
Duration: 2005 Oct 162005 Oct 21

Publication series

NameECS Transactions
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737


Conference208th Meeting of the Electrochemical Society
Country/TerritoryUnited States
CityLos Angeles, CA


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