Thickness evaluation of thermal spraying on boiler tubes by eddy current testing

Yohei Takahashi, Ryoichi Urayama, Tetsuya Uchimoto, Toshiyuki Takagi, Hiroshi Naganuma, Kazufumi Sugawara, Yoriaki Sasaki

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


This paper discusses the feasibility of thickness evaluation of Ni-based alloy coating sprayed on type 304 austenitic stainless steels by swept frequency eddy current testing which measures the impedance spectra of coil. Comparing the experimental signals with the numerical ones, the electromagnetic models of coating are developed. Using these models, the inverse analyses are conducted. The coating thicknesses are estimated within the maximum error of 22 μm.

Original languageEnglish
Pages (from-to)419-425
Number of pages7
JournalInternational Journal of Applied Electromagnetics and Mechanics
Issue number1-4
Publication statusPublished - 2012


  • Thermal spraying
  • coating thickness
  • inverse analysis
  • swept frequency eddy current testing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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