Ukpai, J, Barker, R, Hu, X et al. (1 more author) (2013) An in-situ investigation of CO flow-induced corrosion and erosion-corrosion of UNS K03014 pipeline materials using combined acoustic emission and LPR methods. In: NACE - International Corrosion Conference Series. Corrosion 2013, 17-23 Mar 2013, Orlando, Florida, USA. ISBN 978-162748145-8
Abstract
A method based on count rate and energy of measured acoustic emission (AE) signals has been implemented to investigate flow-induced corrosion and erosion-corrosion of UNS K03014 carbon steel. The specimen's corrosion behavior under the submerged impinging jet (SIJ) in a CO saturated oilfield process brine at constant temperature of 50 oC was assessed for different flow velocities (7, 10, 15 m/s) without sand for flow-induced corrosion and with sand (50, 200, 500 mg/L) for erosion-corrosion. AE signal count rate during each test was measured and analyzed simultaneously with the corrosion rate from linear polarization resistance (LPR). The results show a good correlation between AE count rate and corrosion rate in each test; and that AE count rate increases with increase in corrosion rate as flow velocity is increased for flow-induced corrosion as well as increase in sand loading for erosion-corrosion which is an indication that flow-induced corrosion and erosion-corrosion mechanisms are sources of AE signals. The suitability of the AE technique in monitoring flow-induced corrosion and erosion-corrosion was further assessed by adding 100 ppm high shear film forming corrosion inhibitor at 10 m/s flow velocity and a considerable reduction in AE count rate and corrosion rate was observed.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Keywords: | Acoustic emission; corrosion rate; count rate; erosion-corrosion; flow-induced corrosion; impinging jet; LPR; UNS K03014 carbon steel |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 23 May 2014 14:36 |
Last Modified: | 19 Dec 2022 13:27 |
Status: | Published |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:78993 |