International Conference on

Minerals, Metallurgy and Materials

March 22-24, 2021 | Valencia, Spain

Noora Al-Qahtani

Speaker for Materials Science Conference-Noora Al-Qahtani
Noora Al-Qahtani
Qatar University and Imperial College London, Qatar
Title : Understanding the scales formation Inhibition mechanism on C-Steel in a sour media


Corrosion control in sour environments is a serious challenge for oil and gas industry in dour media. One of the approaches to mitigate such problem is to use corrosion inhibitors (CI). The selection of a single or a mixture of CIs for a particular oil or gas production, transportation or storage facility depends on different parameters e.g. the ratio between carbon dioxide and hydrogen sulfide, pH, pressure, temperature, and brine chemistry where different kinds of iron sulfide and/or iron carbonate layers can be formed. To select the right corrosion inhibitor/s, it is highly crucial to understand the mechanism of corrosion of C-steel and its inhibition in H2S systems in absence and presence of CIs [1,2].
In this work, the electrochemical behavior of C-steel in (i) deionized water (DIW) and (ii) different NaCl solutions were examined in an H2S system. A series of experiments were conducted at different temperatures and two concentrations of inhibitors (A and B). The corrosion behavior of C-steel was investigated by measuring the open circuit potential (OCP), linear polarization resistance (LPR), and potentiodynamic polarization (PDP) in addition to scanning electron microscopy (SEM) coupled with an energy dispersive X-ray (EDX) besides Raman spectroscopy (RS). The results have shown that the corrosion rate of C-steel gradually decreased then stabilized with time in the inhibited solutions. The inhibition efficiency was found to increase in the presence of both types of inhibitors with temperatures. Surface analysis shows that no film of corrosion products existed. In fact, CIs controlled the corrosion process and prevented passive film formation (iron sulfide), even in the presence of H2S in all tests.
Audience Takeaway:
(a) understand the mechanisms and kinetics of sulfide scaling formation in sour oil and environment, and the effect of hydrogen sulfide on the electrochemical performance of iron-based materials,
(b) understand how to apply processes for characterization of the corroded surfaces (scale formation),
(c) establish meaningful experiments to measure the electrochemical kinetics of H2S corrosion,
(d) investigate the mechanisms by which corrosion inhibitors (CI) effect scale development and their ability to mitigate H2S corrosion.


Noora Al-Qahtani joined Qatar university in 2008, and she is currently a Research Associate, Center for Advanced Materials at the Qatar University. She is also in a final year in her PhD study at a department of material science and engineering at Imperial College London-UK. Noora earned her MSc. from the University of Sheffield in 2015, in Materials Science and Engineering. She is also introducing higher-level research among high school students to promote the young researcher towards scientific education. She also authored numerous peer-reviewed journals and conference papers. Her current research focus in areas of applied electrochemistry and corrosion, and educational research for young students. In addition, her interests encompass archaeology from a scientific aspect. She is a member of the Institute of Materials Mining and Minerals from 2015 and a member of the NACE International-The Worldwide Corrosion Authority and Electrochemical Society (ECS) from 2015. Noora is also the Co-team leader of the Al-Bairaq whose vision is to develop Qatar as a knowledge-based society, enriching its human capital through prioritizing the importance of forging links and building bridges between high school students and educational institutions. Over the years she has been actively involved in Teaching, Research along with Admin works in various capacities.


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