Possibility of non-destructive detection of electrochemical migration in epoxy resin by the pulsed electroacoustic method

M. Natsui, H. Asakawa, T. Tanaka, Y. Ohki, T. Maeno, K. Okamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Pulsed electroacoustic (PEA) method was applied as a nondestructive method to detect electrochemical migration in a sheet of epoxy resin and a sheet of laminate consisting of the same resin and a paper/phenol-resin composite. A significant decrease in the amount of negative charge was observed at the interface between the resin and the composite when the sample was the laminate. This is assumed to be due to the progress of electrochemical migration in the thickness direction. On the other hand, such a change in charge density was hardly observed when the sample was a sheet of epoxy resin. The electric field intensity in the epoxy resin layer in the laminate is assumed to be significantly enhanced, since the resistivity is much higher in the epoxy resin than in the composite. This seems to be the main reason why the electrochemical migration was induced only in the epoxy layer in the laminate. This means that observation of electrochemical migration in epoxy resin by the PEA method becomes possible by forming a laminate structure using the epoxy resin and paper/phenol-resin composite.

Original languageEnglish
Title of host publicationCEIDP - 2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena
Pages104-107
Number of pages4
DOIs
Publication statusPublished - 2009 Dec 1
Event2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Virginia Beach, VA, United States
Duration: 2009 Oct 182009 Oct 21

Publication series

NameAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
ISSN (Print)0084-9162

Conference

Conference2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
CountryUnited States
CityVirginia Beach, VA
Period09/10/1809/10/21

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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  • Cite this

    Natsui, M., Asakawa, H., Tanaka, T., Ohki, Y., Maeno, T., & Okamoto, K. (2009). Possibility of non-destructive detection of electrochemical migration in epoxy resin by the pulsed electroacoustic method. In CEIDP - 2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (pp. 104-107). [05377879] (Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP). https://doi.org/10.1109/CEIDP.2009.5377879