Electrochemical behaviour of an inhibitor film formed on copper surface

E. Szocs, Gy Vastag, A. Shaban, E. Kálmán

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

The potential dependence of adsorption and kinetic properties of inhibitor film formation on copper surface was studied in acidic environment by using surface sensitive techniques: electrochemical quartz crystal microbalance (EQCM) and electrochemical scanning tunneling microscopy (EC-STM). The investigated inhibitor was 5-mercapto-1-phenyl-tetrazole (5-MPhTT) in 1 mmoldm-3 H2SO4 solution. The QCM investigations were done to study the electrode mass changes in absence and presence of 5-MPhTT at rest potential. The apparent mass and current variation as a function of the electrode potential was registered in order to study the protective film and its breakdown. Results revealed that the anodic current density and the electrode mass loss is twice less in presence of 5-MPhTT. We also present results of an in situ STM study on the surface morphology and anodic dissolution of Cu(1 1 1) electrodes in inhibited/uninhibited electrolytes. The images gave information about the nature of the protective layer. The results were analyzed and discussed.

Original languageEnglish
Pages (from-to)893-908
Number of pages16
JournalCorrosion Science
Volume47
Issue number4
DOIs
Publication statusPublished - Apr 2005

Fingerprint

Copper
Electrodes
Quartz crystal microbalances
Protective coatings
Scanning tunneling microscopy
Electrolytes
Surface morphology
Dissolution
Current density
Adsorption
Kinetics
1H-tetrazole

Keywords

  • 5-mercapto-1-phenyl-tetrazole inhibitor
  • Copper corrosion inhibition
  • EC-STM
  • EQCM

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

Electrochemical behaviour of an inhibitor film formed on copper surface. / Szocs, E.; Vastag, Gy; Shaban, A.; Kálmán, E.

In: Corrosion Science, Vol. 47, No. 4, 04.2005, p. 893-908.

Research output: Contribution to journalArticle

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