Onyeji, L and Kale, G orcid.org/0000-0002-3021-5905 (2017) Corrosion performance of high strength-low alloy steels in aerated and CO₂ saturated Lyman and Fleming solutions. In: Proceedings of the Materials Science and Technology Conference and Exhibition 2017. MS&T17: Materials Science and Technology Conference and Exhibition 2017, 08-12 Oct 2017, Pittsburgh, PA, USA. MS&T17 , pp. 1103-1108. ISBN 978-1-5108-5058-3
Abstract
Aerated and CO₂ saturated Lyman and Fleming solutions were used as electrolytes to investigate the corrosion susceptibility of three high strength low alloy steels (HSLA) designated as Steel A, Steel B and Steel C. API 5L X65 carbon steel was used as reference specimen. Electrochemical Polarization (LPR and Tafel Extrapolation) and surface analysis (SEM/EDAX and XRD) techniques were used for this investigation. The results of linear polarization resistance (LPR) and potentiodynamic polarization corroborated each other presenting the corrosion performance (CP) of the steels in a descending order of CP Steel C> CP Steel B > CP X65> CP Steel A. The results also revealed a more severe corrosion attack averaging about 35% for all the steels in the aerated than in the CO₂ saturated Lyman/Fleming solutions. This was attributed to the absence of dissolve oxygen (DO) and the covering of the surface of the specimens by CO₂ gas in CO₂ saturated solution. On the other hand, the presence of DO which is a precursor for cathodic reduction and for the formation of calcareous deposits, initiated an early rapid corrosion attack culminating to higher corrosion rates within the 24 hours of this work. The chemical composition and microstructures of the steels contributed significantly to the witnessed corrosion behaviour. The API XL X65 carbon steel showed almost a comparable corrosion resistance with Steel A but differ significantly with Steel B and Steel C in both aerated and CO₂ saturated Lyman and Fleming solutions.
Metadata
Item Type: | Proceedings Paper |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2017 MS&T17. This is an author produced version of a paper published in Proceedings of the Materials Science and Technology Conference and Exhibition 2017. Uploaded with permission from the publisher. |
Keywords: | Aerated Solution; Calcareous Deposits; CO₂ saturated solutions; Corrosion Rate; Dissolved Oxygen; High Strength-Low Alloyed Steels; Lyman and Fleming solutions |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 26 Oct 2018 09:58 |
Last Modified: | 30 Oct 2018 13:57 |
Status: | Published |
Publisher: | MS&T17 |
Identification Number: | 10.7449/2017/MST_2017_1103_1108 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:137818 |