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TitleIn-situ synchrotron X-ray diffraction studies of CO 2 corrosion of carbon steel with scale inhibitors ATMPA and PEI at 80 °C
Publication TypeBook
Year of Publication2012
AuthorsKo, M., Laycock N.J., Ingham B., and Williams D.E.
Series TitleNACE - International Corrosion Conference Series
Number of Pages3662 - 3673
ISBN03614409 (ISSN); 9781622760787 (ISBN)
KeywordsCarbon dioxide, Carbon steel, Corrosion rate, Corrosion tests, In-situ synchrotrons, Open circuits, Organic acids, Phosphonic acids, Polyethyleneimine, Scale formation, Scale inhibitor, Sodium chloride, Sodium chloride solution, Synchrotron radiation, Trimethylene, X ray diffraction
AbstractWe have used in-situ synchrotron x-ray diffraction to experimentally investigate the effect of two common scale inhibitors amino trimethylene phosphonic acid (ATMPA) and polyethyleneimine (PEI) on the corrosion rate and protective scale formation process during CO 2 corrosion of carbon steel. These experiments were performed under mild anodic polarization in sodium chloride solutions at ∼1 bar CO 2, 80 °C and pH 6.3, such that protective scales would readily form in the absence of any organic scale inhibitors. These results are compared against longer-term open circuit data corrosion tests in similar conditions but at up to 30 bar CO 2. ©2012 by NACE International.

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