Passive and active magnetic sensing to characterize corrosion of metals

G. E. Gallo, J. S. Popovics, P. L. Chapman

Research output: Contribution to journalConference article

Abstract

Corrosion is a serious and costly problem for the world's infrastructure. Traditional non-destructive methods have proven to be useful in determining extent and rate of corrosion; however they are limited by the need to electrically connect to the inspected metal. Magnetic sensing is proposed as a way to overcome these limitations. Preliminary results are presented here on the use of GMR magnetic field sensors to passively and actively detect corrosion of aluminum and steel plates. Passive sensing seems particularly useful to identify localized active corrosion on aluminum, while active sensing appears useful to identify active corrosion in steel.

Original languageEnglish (US)
Pages (from-to)1379-1385
Number of pages7
JournalAIP Conference Proceedings
Volume1096
DOIs
StatePublished - May 5 2009
EventReview of Progress in Quantitative Nondestructive Evaluation - Chicago, IL, United States
Duration: Jul 20 2008Jul 25 2008

Keywords

  • Concrete
  • Corrosion
  • Eddy current
  • GMR
  • Magnetic sensing

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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