Passive and active corrosion sensing for metals using magnetic sensors

John S. Popovics, Gonzalo E. Gallo, Melanie Johnson, Patrick L. Chapman

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

Abstract

Metal corrosion is a significant problem for the US concrete infrastructure. Accurate and continuous corrosion sensing methods would help reduce this cost and enable effective health monitoring and service life prediction. In this paper, recent efforts to apply giant magneto-resistive response (GMR) and eddy current sensors for corrosion sensing are described. The sensors are applied in passive and active sensing configurations, neither of which require excavation of the concrete, so remote sensing at a surface and internal sensing with an embedded unit are possible. The passive and active testing configurations are described. Then experimental results for aluminum corrosion are presented, with the aim of identifying existing corrosion state to date and rate of active corrosion at time of sensing.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems 2008
DOIs
StatePublished - Jun 2 2008
EventHealth Monitoring of Structural and Biological Systems 2008 - San Diego, CA, United States
Duration: Mar 10 2008Mar 13 2008

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6935
ISSN (Print)0277-786X

Other

OtherHealth Monitoring of Structural and Biological Systems 2008
CountryUnited States
CitySan Diego, CA
Period3/10/083/13/08

Keywords

  • Concrete
  • Corrosion
  • GMR
  • Magnetic sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Popovics, J. S., Gallo, G. E., Johnson, M., & Chapman, P. L. (2008). Passive and active corrosion sensing for metals using magnetic sensors. In Health Monitoring of Structural and Biological Systems 2008 [69350U] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6935). https://doi.org/10.1117/12.778532