Localized corrosion with H2S
In collaboration with research partner DNV GL
The prediction of localized corrosion of corrosion-resistant alloys (CRAs) in severe oil and gas production environments
OLI is extending capability in our corrosion simulation technology to predict localized corrosion of corrosion-resistant alloys (CRAs) in severe oil and gas production environments.
This work is in conjunction with Phase 1 of a recent DNV GL Joint Industry Project (JIP). This JIP responded to a trend towards increasing severity of oil and gas production environments: more extreme pressures and temperatures, and more "aggressive" species including H2S, elemental sulfur, and chlorides. Such severe well environments necessitate the use of corrosion resistant alloys (CRAs).
At the same time, the corrosion resistant alloys needed further research in order to establish performance limits in terms of localized corrosion and stress corrosion cracking (SCC) under extreme well conditions. This JIP combined DNV GL's experimental work and OLI's corrosion simulation model development.
Two key concepts underly this JIP:
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Conditions that lead to localized corrosion are similar to those that lead to stress corrosion cracking.
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Onset of both phenomena can be predicted by considering the relative values of the corrosion potential and repassivation potential.
The Gordon Research Conference on Aqueous Corrosion invited Andre Anderko to give a presentation,
"Modeling Localized Corrosion of Corrosion-Resistant Alloys in Environments Containing Hydrogen Sulfide"
The Gordon Research Conference is the preeminent biennial gathering of corrosion scientists at the Colby-Sawyer College in New Hampshire.
This presentation includes OLI's fundamental work on predicting the phase behavior and corrosivity of H2S-containing environments as well as the progress of OLI work in collaboration with the DNV GL project.
Phase 2 of this JIP is in the proposal phase!
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The OLI presentation at the Gordon Conference; or,
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Information on Phase 2 of this work.
