Development of a structure-activity relationship for oil field corrosion inhibitors

W Durnie; Roland De Marco; A Jefferson; B Kinsella

doi:10.1149/1.1391837

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Development of a structure-activity relationship for oil field corrosion inhibitors

Journal article

Peer reviewed

Development of a structure-activity relationship for oil field corrosion inhibitors

W Durnie, Roland De Marco, A Jefferson and B Kinsella

Journal of the Electrochemical Society, Vol.146(5), pp.1751-1756

1999

DOI: https://doi.org/10.1149/1.1391837

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Abstract

adsorption isotherms

carbon steel

chemisorption

corrosion protection

electrochemical corrosion

enthalpy

entropy

gibbs free energy

molecular dynamics

molecular structure

quantum theory

steel corrosion

software package PCSpartan

Corrosion rate data for mild steel corrosion inhibitors in carbonated brine media were fitted to the Temkin adsorption isotherm. The fundamental constants of the Temkin adsorption isotherm, i.e., molecular interaction and adsorption equilibrium constants, were used to glean important information about the behavior of adsorbed corrosion inhibitors. Adsorption data were also used to calculate ΔadH, ΔadG, and ΔadS, and the results demonstrated that some compounds are chemisorbed onto the electrode. Significantly, it has been found that chemisorption of corrosion inhibitors can yield very good film persistency (i.e., corrosion protection even when the inhibitor is no longer present). Molecular modeling using the quantum mechanical program PCSpartan plus, along with a comparative analysis of adsorption data for a broad range of inhibitor molecules, has been used to derive a tentative structure/activity relationship for some oil field corrosion inhibitors.

Details

Title: Development of a structure-activity relationship for oil field corrosion inhibitors
Authors: W Durnie (Author) - Curtin University of Technology
Roland De Marco (Author) - Curtin University of Technology
A Jefferson (Author) - Curtin University of Technology
B Kinsella (Author) - Curtin University of Technology
Publication details: Journal of the Electrochemical Society, Vol.146(5), pp.1751-1756
Publisher: Electrochemical Society, Inc.
Date published: 1999
DOI: 10.1149/1.1391837
ISSN: 0013-4651; 0013-4651
Organisation Unit: University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
Language: English
Record Identifier: 99448789202621
Output Type: Journal article

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Web Of Science research areas: Electrochemistry; Materials Science, Coatings & Films