Effect of hydrodynamics and surface roughness on the electrochemical behaviour of carbon steel in CSG produced water

Eyu, Gaius Debi, Will, Geoffrey, Dekkers, Willem, & MacLeod, Jennifer (2015) Effect of hydrodynamics and surface roughness on the electrochemical behaviour of carbon steel in CSG produced water. Applied Surface Science, 357(Part A), pp. 506-515.

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The influence of fluid flow, surface roughness and immersion time on the electrochemical behaviour of carbon steel in coal seam gas produced water under static and hydrodynamic conditions has been studied. The disc electrode surface morphology before and after the corrosion test was characterized using scanning electron microscopy (SEM). The corrosion product was examined using X-ray photoelectron spectroscopy (XPS) and X-ray diffractometry (XRD).The results show that the anodic current density increased with increasing surface roughness and consequently a decrease in corrosion surface resistance. Under dynamic flow conditions, the corrosion rate increased with increasing rotating speed due to the high mass transfer coefficient and formation of non-protective akaganeite β- FeO(OH) and goethite α- FeO(OH) corrosion scale at the electrode surface.The corrosion rate was lowest at 0 rpm.The corrosion rate decreased in both static and dynamic conditions with increasing immersion time. The decrease in corrosion rate is attributed to the deposition of corrosion products on the electrode surface. SEM results revealed that the rougher surface exhibited a great tendency toward pitting corrosion.

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ID Code: 87599
Item Type: Journal Article
Refereed: Yes
DOI: 10.1016/j.apsusc.2015.08.206
ISSN: 0169-4332
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Elsevier
Deposited On: 21 Sep 2015 22:47
Last Modified: 23 Sep 2015 00:23

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