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Journal of Nondestructive Evaluation

, Volume 8, Issue 1, pp 37–43 | Cite as

Use of magnetically-saturated regions in remote field eddy current tools

  • D. L. Atherton
  • W. Czura
  • T. R. Schmidt
  • S. Sullivan
  • C. Toal
Article

Abstract

The remote field eddy current (RFEC) technique is of potential interest for inspecting pipelines for stress corrosion cracking. Magnetic saturation techniques would allow higher operating frequencies and scanning speeds to be used. The use of selectively-saturated regions (windows) near the exciter and detector offers additional advantages. Finite element, analytic, and experimental measurements are presented in this paper. They show that, while saturation techniques are helpful, the effects are less than initially estimated from simple skin depth approximations.

Key words

remote field eddy current magnetic saturation stress corrosion cracking finite element calculations skin depth 

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Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • D. L. Atherton
    • 1
  • W. Czura
    • 1
  • T. R. Schmidt
    • 1
  • S. Sullivan
    • 1
  • C. Toal
    • 1
  1. 1.Department of PhysicsQueen's UniversityKingstonCanada

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