Investigating Rhodanine film formation on roughened Cu surfaces with electrochemical impedance spectroscopy and surface-enhanced Raman scattering spectroscopy

Nicole R. Honesty, Gülfeza Kardaş, Andrew A. Gewirth

Research output: Contribution to journalArticlepeer-review

Abstract

The inhibitory effect of Rhodanine (RD) on copper in acidic media has been investigated by electrochemical impedance spectroscopy (EIS) and surface-enhance Raman scattering (SERS) spectroscopy. Roughened copper was used for EIS experiments to better compare with SERS results. The EIS results show two loops in the Nyquist plot, one of which is associated with protective film growth on the rough surface after 1 h. The SERS spectra showed a marked decrease in intensity after 1 h, which is attributed to formation of thick films opaque to the laser. The film thickness after 2. h was determined to be ~200 nm from atomic force microscopy (AFM).

Original languageEnglish (US)
Pages (from-to)59-66
Number of pages8
JournalCorrosion Science
Volume83
DOIs
StatePublished - Jun 2014

Keywords

  • A. Copper
  • B. EIS
  • B. Raman spectroscopy
  • C. Acid corrosion

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemical Engineering(all)
  • Chemistry(all)

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