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Visualising dynamic passivation and localised corrosion processes occurring on buried steel surfaces under the effect of anodic transients

journal contribution
posted on 01.05.2016, 00:00 authored by Ying HuoYing Huo, Mike Yongjun TanMike Yongjun Tan, Maria ForsythMaria Forsyth
A new method of visualising dynamically changing electrode processes has been demonstrated by mapping localised corrosion processes occurring on buried steel surfaces under the effect of anodic transients. Dynamically shifting external electrical interferences such as anodic transients are known to affect the efficiency of cathodic protection (CP) of underground pipelines; however unfortunately conventional techniques including electrochemical methods have difficulties in measuring such effects. In this paper we report that the wire beam electrode has necessary temporal and spatial resolutions required for measuring and visualising the dynamic effects of anodic transients on CP, passivation and localised corrosion processes occurring on buried steel surfaces. For the first time a critical anodic transient duration has been observed and explained as the incubation period for the breakdown of passivity and the initiation of localised corrosion.

History

Journal

Electrochemistry communications

Volume

66

Pagination

21 - 24

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

1388-2481

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2016, Elsevier