A novel two electrode surface impedance sensor

Xiaoning Qi, Brian Hinderliter, Victoria J. Gelling

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

1 Scopus citations

Abstract

Although electrochemical impedance spectroscopy (EIS) has been successfully used in the study of coating degradation and corrosion, its application has mainly been limited to laboratory tests. In this study, a two cell EIS (TCEIS) configuration is proposed by introducing a second cell into the traditional single cell EIS (SCEIS) as a substitute of the working electrode, which in the case of SCEIS is usually an electrical connection to the substrate. Compared to the SCEIS, the TCEIS has the following advantages: 1) the substrate connection required by SCEIS can be eliminated; 2) measurement on nonconductive substrate can be made; 3) defects which are not directly underneath the cell could potentially be detected and located. At the current stage, comparison measurements were carried out between SCEIS and TCEIS on coated panels subjected to ultraviolet (UV), salt spray, and alternating UV/salt spray. Finite element analysis (FEA) was used to simulate the EIS measurements for defects with different sizes and different positions present in the coating system to understand the potential uses and limitation of the TCEIS configuration.

Original languageEnglish (US)
Title of host publication17th International Corrosion Congress 2008
Subtitle of host publicationCorrosion Control in the Service of Society
Pages981-994
Number of pages14
StatePublished - Dec 1 2008
Event17th International Corrosion Congress 2008: Corrosion Control in the Service of Society - Las Vegas, NV, United States
Duration: Oct 6 2008Oct 10 2008

Publication series

Name17th International Corrosion Congress 2008: Corrosion Control in the Service of Society
Volume2

Other

Other17th International Corrosion Congress 2008: Corrosion Control in the Service of Society
CountryUnited States
CityLas Vegas, NV
Period10/6/0810/10/08

Keywords

  • Accelerated weathering
  • Electrochemical impedance spectroscopy
  • Finite element analysis
  • Sensor

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