Localized CO2 corrosion propagation at moderate FeCO3 supersaturation initiated by mechanical removal of corrosion scale

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Abstract

The propagation of localized CO2 corrosion was investigated at moderate iron carbonate supersaturation using an artificial defect method with re-formed corrosion scale. A mechanical tool was developed which locally removed pre-formed iron carbonate scale and initiated localized corrosion at a FeCO3 supersaturation of 3–10. The localized corrosion rate was calculated based on electrochemical measurement using a simplified algorithm and was also measured at the deepest part of the defect using scanning electron microscopy. Localized corrosion was driven by a galvanic cell established between the two surfaces exposed in the artificial defect where an open circuit potential difference was maintained.

Keywords

Localized corrosion Carbon dioxide Electrochemistry Scale 
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Notes

Acknowledgments

The authors thank the Fossil Energy program of DOE for grant FE-10-001-FY11. The author, Jiabin Han, would like to acknowledge the financial support to allow the experimental work from the Joint Industry Project advisory board members of Institute for Corrosion and Multiphase Technology of Ohio University: Baker Hughes, BG Group, BP, Champion, Chevron, Clariant, ConocoPhillips, Encana, Eni, ExxonMobil, INPEX, IONIK, MI-Swaco, Nalco, Occidental Oil, Petronas, Petrobras, PTTEP, Saudi Aramco, Shell, Tenaris and Total.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Earth and Environmental Sciences DivisionLos Alamos National LaboratoryLos AlamosUSA

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