Comparative analysis of the effect of Vernonia amygdaline on subsea transmission pipeline

  • Nitonye Samson Department of Marine Engineering, Rivers State University, Port Harcourt, Rivers State, Nigeria
  • Thaddeus Chidiebere Nwaoha Department of Marine Engineering, Federal University of Petroleum Resources, Delta State, Nigeria https://orcid.org/0000-0002-8687-5558
  • Umoh Ofonime Emmanuel Department of Mechanical/Marine Engineering, Niger Delta University, Amassoma, Bayelsa State, Nigeria
DOI: https://doi.org/10.30464/jmee.2018.2.4.269
Keywords: Pipelines, Corrosion, Environment, Sea water, Inhibitors, Specimen, VA solution, Corrosion rate, Weight loss

Abstract

Subsea transmission pipelines (STP) are designed to transport liquids, gases or solid/liquid mixtures over some distances. STP are buried underground or submerged in water for transportation of natural oil and gas (O&G) products.  A Vernonia amygdalina (VA) solution is prepared to act as an inhibitor. The specimens are kept in a workable state. Steps are taken to prepare each specimen. All cuts and sheared edges were ground out to prevent them from becoming sites for preferential attack. The finishing of the specimen surface with grit abrasive paper (sand paper) and rinsing of the specimens in distilled water are carried out. Then, degreasing of specimen in acetone and air-dried are carried out. Upon drying, the specimens are immediately weighed to obtain their initial weights. Twelve specimens are used for the test as follows: 6 Aluminum (Al); and 6 mild steel (MS) samples. With a 2M concentration of VA solution, the MS and Al samples are immersed in different plastic containers containing 400ml of seawater with pH value of 7.25 with no (0%) inhibitor added to it. A 5% (400ml) of the VA solution is poured into the measuring cylinder for each sample-Al and MS. 

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Author Biographies

Nitonye Samson, Department of Marine Engineering, Rivers State University, Port Harcourt, Rivers State, Nigeria

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Samson Nitonye is a Lecturer in the Department of Marine Engineering of the Faculty of Engineering in the Rivers State University, Port Harcourt, Nigeria. He is a registered Engineer with the Council for the Regulation of Engineering in Nigeria (COREN) and a member of Nigerian Society of Engineers (NSE). He also lectures at the Center of Excellence in Marine and Offshore Engineering of the Rivers State University. He holds a Bachelor and Master’s Degrees in Marine Engineering and he is currently a PhD student in Naval Architecture and Ship Building in the same University. His area of specialization includes amongst others; Ship Power Plant, Naval Architecture, Stability Analysis. He is also a member to some International bodies like SNAME, IMarEST, RINA and ASME. He is also a Bond Servant of God.

Thaddeus Chidiebere Nwaoha, Department of Marine Engineering, Federal University of Petroleum Resources, Delta State, Nigeria

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Thaddeus Chidiebere Nwaoha obtained his PhD in Marine and Offshore Technology and MSc in Marine and Offshore Engineering from Liverpool John Moores University, UK in 2011 and 2006 respectively. His professional experiences comprise of academic and industrial experiences in LNG carrier system maintenance and risk modeling, inspection of topside and subsea equipment, quality assurance, safety, risk and reliability analysis of marine and offshore systems. He has served as an inspection, quality assurance, safety and reliability engineer in marine and offshore companies and a member of professional bodies such as IMarEST, NSE and COREN. Since 2010, he has authored and co-authored more than 30 journal papers in world leading journals and one of his papers was nomination for SAGE 2011 best paper award in Journal of Engineering for Maritime Environment. His research interests are system failure analysis, design for safety of marine and offshore system, optimization, maintenance modeling and risk/reliability analysis. Currently, he serves as a senior lecturer in Marine Engineering Department, Federal University of Petroleum Resources, Nigeria and marine/offshore risk engineering consultant for various companies.

Umoh Ofonime Emmanuel, Department of Mechanical/Marine Engineering, Niger Delta University, Amassoma, Bayelsa State, Nigeria

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Umoh Ofonime Emmanuel holds a bachelor's degree in Marine Engineering from the Niger Delta University, Wilberforce Island, Bayelsa State. She is currently undergoing a master's degree at the Center of Excellence in Marine and Offshore Engineering of the Rivers State University, Port Harcourt, Nigeria

JMME 2(4) 2018 front cover
Published
2018-12-21
How to Cite
Samson, N., Nwaoha, T. and Emmanuel, U. (2018) “Comparative analysis of the effect of Vernonia amygdaline on subsea transmission pipeline”, Journal of Mechanical and Energy Engineering, 2(4), pp. 269-276. doi: 10.30464/jmee.2018.2.4.269.
Issue
Vol 2 No 4 (2018)
Section
Mechanical Engineering

Copyright (c) 2018 Nitonye Samson, Thaddeus Chidiebere Nwaoha, Umoh Ofonime Emmanuel

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