Application of Potential Drop Technique to Nondestructive Evaluation of Thin Layer on Material Surface

Masumi Saka, Haruhiko Kurosaki, Kenji Nishibe, Hiroyuki Abfi

Research output: Contribution to journalArticlepeer-review

Abstract

It is well known that high-frequency a. c. current flows along a surface due to the skin effect. A method for applying the a. c. potential drop technique is proposed to nondestructively evaluate the thickness and the electromagnetic properties of a thin layer on a material surface. First, Maxwell's equations are solved to obtain the potential drop on the surface of a layer for a cylindrical material. Next, a. c. potential drop is measured for a specimen with a thin layer of electroplating on its surface. Finally, the inverse problem is analyzed to determine the thickness and the electromagnetic properties of the electroplated layer, where measurements of the potential drop are compared with theoretical computations. It is verified that the present method can be used for the nondestructive evaluation of the thin layer.

Original languageEnglish
Pages (from-to)272-277
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume60
Issue number569
DOIs
Publication statusPublished - 1994

Keywords

  • A. C. Potential Drop Technique
  • Coating
  • Computational Mechanics
  • Electroplating
  • Inverse Problem
  • Nondestructive Inspection

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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