Corrosion inhibitor - iron interactions: A study combining surface science and electrochemistry

G. Bhargava, T. A. Ramanarayanan, I. Gouzman, S. L. Bernasek

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

Abstract

The difference in corrosion inhibition behavior of imidazole deposited on iron by two different methods has been examined using Electrochemical Impedance Spectroscopy (EIS) and X-ray Photoelectron Spectroscopy (XPS). Adding imidazole directly into the aqueous corrosive medium has been observed to provide greater protection against corrosion, in comparison to the direct deposition of the inhibitor onto the metal surface prior to exposure to the corrosive solution. Analysis of the AC impedance spectra revealed that the value of the polarization resistance (Rp) in the case of imidazole addition to the corrosive medium was an order of magnitude higher than in the predeposited case. Results of XPS investigations suggested that in the former case, the imidazole reacts through the "pyrrole type" nitrogen with the aromatic ring more parallel to the metal surface. In the latter situation "pyridine type" nitrogen-iron interaction predominates with the imidazole ring more normal to the surface. copyright The Electrochemical Society.

Original languageEnglish (US)
Title of host publicationCorrosion Protective Coatings and Inhibitors
PublisherElectrochemical Society Inc.
Pages195-206
Number of pages12
Edition9
ISBN (Electronic)9781566774864
DOIs
StatePublished - 2006
Externally publishedYes
EventCorrosion Protective Coatings and Inhibitors - 208th Electrochemical Society Meeting - Los Angeles, CA, United States
Duration: Oct 16 2005Oct 21 2005

Publication series

NameECS Transactions
Number9
Volume1
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceCorrosion Protective Coatings and Inhibitors - 208th Electrochemical Society Meeting
Country/TerritoryUnited States
CityLos Angeles, CA
Period10/16/0510/21/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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