Thickness evaluation of thermally sprayed coatings after exposure to boiler tube environments by eddy current testing

Tetsuya Uchimoto, Toshiyuki Takagi, Yohei Takahashi, Hiroshi Naganuma, Kazufumi Sugawara, Yoriaki Sasaki, Thierry Douillard, Karine Masenelli-Varlot, Jöel Courbon

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This paper discusses the feasibility of determining the thickness of Ni-based alloy sprayed coatings that have been heated in plant environments using swept frequency eddy current testing based on the measurement of the impedance spectrum of the measurement coil. Through a comparison of the experimental and computed signals, an electromagnetic model simulating the test geometry including the coating and the substrate is presented, with particular focus on the effects of heat treatment. Using these models, the coating thickness is estimated using the measured impedance spectra, and the estimation error was found to be around 30 μm.

Original languageEnglish
Pages (from-to)993-1001
Number of pages9
JournalInternational Journal of Applied Electromagnetics and Mechanics
Volume47
Issue number4
DOIs
Publication statusPublished - 2015 Jun 9

Keywords

  • Thermally sprayed coating
  • boiler tube environment
  • coating thickness
  • 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

Fingerprint Dive into the research topics of 'Thickness evaluation of thermally sprayed coatings after exposure to boiler tube environments by eddy current testing'. Together they form a unique fingerprint.

Cite this