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Remote sensing of aluminum alloy corrosion by SQUID magnetometry

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Abstract

Macroscopic magnetic fields were detected on corroding aluminum alloy (AA 2024) samples by SQUID magnetometry. The fields originated from corrosion reactions due to asymmetric sample geometry, electrolyte flow and differences in surface activity. Magnetic images were obtained by a SQUID magnetometer operating in liquid helium with a spatial resolution of approximately 1 mm. The measurements demonstrated SQUID capability for corrosion sensing across integrated media consisting of gaseous and solid dielectrics (air, plastics), an electronic conductor (aluminum alloy) and an ionic conductor (solution). The results show the potential of SQUID magnetometry for practical corrosion detection in restricted locations (“hidden” corrosion) and in subjects where solution flow is applied.

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Acknowledgements

E.J. acknowledges the Council for International Exchange of Scholars (Washington, DC) for a Fulbright research fellowship.

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Authors and Affiliations

  1. Institute of Chemistry, A. Goštauto 9, 2600 , Vilnius, Lithuania

    Eimutis Juzeliūnas

  2. Department of Physics and Astronomy, Vanderbilt University, VU Station B 351807, Nashville, TN , 37235, USA

    Yu Pei Ma & John P. Wikswo

Authors
  1. Eimutis Juzeliūnas
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  2. Yu Pei Ma
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  3. John P. Wikswo
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Correspondence to Eimutis Juzeliūnas.

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Contribution to the 3rd Baltic Conference on Electrochemistry, GDAŃSK-SOBIESZEWO, 23–26 APRIL 2003.

Dedicated to the memory of Harry B. Mark, Jr. (February 28, 1934 – March 3rd, 2003)

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Juzeliūnas, E., Ma, Y.P. & Wikswo, J.P. Remote sensing of aluminum alloy corrosion by SQUID magnetometry. J Solid State Electrochem 8, 435–441 (2004). https://doi.org/10.1007/s10008-003-0460-2

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  • DOI: https://doi.org/10.1007/s10008-003-0460-2

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