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Persistence of carbon dioxide corrosion inhibitors
Journal article   Peer reviewed

Persistence of carbon dioxide corrosion inhibitors

Roland De Marco, W Durnie, A Jefferson, B Kinsella and A Crawford
Corrosion, Vol.58(4), pp.354-363
2002
DOI: https://doi.org/10.5006/1.3287686
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https://doi.org/10.5006/1.3287686View
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Abstract

batch treatment inhibitors carbon dioxide corrosion corrosion inhibitors inhibitor persistence mild steel
This study used a polarization resistance (PR) technique in the long-term monitoring of corrosion rates for filmed electrodes in inhibitor-free electrolyte to assess the persistence of a broad range of batch treatment oil-field corrosion inhibitors. It was found that the persistence of an oil-field corrosion inhibitor is related to its tenacity of adsorption (reflected by its adsorption enthalpy) along with its affinity for hydrocarbon, as expressed by its octanol (C8H18O)-to-water distribution coefficient (P), obtained using the HyperChem molecular modeling program. Furthermore, a short-term electrochemical impedance spectroscopy monitoring program explored the interaction of hydrocarbons with inhibitor films, and the results generally correlated with the long-term PR data for the persistence of oil-field corrosion inhibitors. It was shown that this integrated approach provides valuable insights into the factors governing the persistence of oil-field corrosion inhibitors.

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Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
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