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

• Autorzy: Samson N. , Nwaoha T. C. , Emmanuel U. O.

Identyfikatory

DOI

10.30464/jmee.2018.2.4.269

• Języki publikacji: EN

Abstrakty

EN

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. The specimens are suspended by the strings and completely immersed in the different percentage test media. The same procedure is carried out for each of the different percentages (i.e. 10%, 15%, 20%, and 25%) and a total of 12 solutions are set up. The seawater used has 7.25 pH. At the end of every week (168 hours), the specimens are removed from the corrosive media. Observation and recording of appearance of the specimen, noting sites are done to analyze the effect of the VA solution on the AL and MS used for the STP. Values are obtained and graphs plotted on weight loss (WL) and corrosion rate (CR) versus the time. It is observed that the VA solution has different effect on the STP at different time and percentage of the VA solution introduced into the environment of the pipe. It was also observed that optimum inhibition of coupons is obtained between 15-25% of VA solution during the first four weeks of testing. At the fifth week, the inhibitor was gradually losing its effectiveness. This means that more inhibitor needs to be added at regular intervals in order to sustain the effectiveness of the inhibitor.

Słowa kluczowe

EN

pipelines; corrosion; environment; sea water; inhibitors; specimen; VA solution; corrosion rate; weight loss

PL

rurociągi; korozja; środowisko; woda morska; inhibitory; próbka; roztwór VA; szybkość korozji; ubytek masy

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2018
• Tom: Vol. 2, No 4
• Strony: 269--276
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Samson N.

• Department of Marine Engineering, Rivers State University, Port Harcourt, Rivers State, Nigeria

autor

Nwaoha T. C.

• Department of Marine Engineering, Federal University of Petroleum Resources, Delta State, Nigeria

autor

Emmanuel U. O.

• Department of Mechanical/Marine Engineering, Niger Delta University, Amassoma, Bayelsa State, Nigeria

Bibliografia

• 1. Aced students portal (2014). Wikipedia, 2005.
• 2. Alawode A.J., Ogunleye I.O. (2011). Maintenance, security and environmental implications of pipeline damage and ruptures in the niger delta Region. Pacific Journal of Science and Technology. Vol. 12, No. 1, pp. 565-573.
• 3. Samson N., Emmanuel U.O., Ezenwa A.O. (2018). Combating corrosion in transmission pipelines in marine environment using vernomia amydalina as inhibitor. Open Journal of Marine Science, Vol. 8, No. 4, pp. 450-472.
• 4. Iduk U., Samson N. (2015). Effects and solutions of marine pollution from ships in nigerian waterways. International Journal of Scientific and Engineering Research, Vol. 6, No. 9, pp. 782-792.
• 5. Ekine A.S., Emujakporue G.O. (2010). Investigation of corrosion of buried oil pipeline by the electrical geophysical methods. Journal of Applied Science and Environmental Management, Vol. 14, No. 1, pp. 63-65.
• 6. Sully J.R. Taylor D.W. (2004). Electrochemical Methods of Corrosion Testing Metals. ASM Handbook, Vol. 13a, Marcel Dekker, Inc., New York.
• 7. Standard Practice (2007). Control of external corrosion on underground or submerged metallic piping system. National Association of Corrosion Engineers International. https://www.nace.org/uploadedFiles/Corrosion_Central/Industries/SP016907PHMSA.pdf (accessed: November 2018).
• 8. Tuaweri T.J., Ogbonnaya A.O., Onyemaobi O.O (2015). Corrosion inhibition of heat treated mild steel with neem leaves extract in a chloride medium. International Journal of Research in Engineering and Technology, Vol. 4, No. 6, pp. 404-409.
• 9. Tuaweri T.J., and Ogbonnaya E.A. (2017). Corrosion Inhibition characteristics of Vernonia Amygdalina (Bitter leaf) Mild Steel in Seawater. Journal of Scientific and Engineering Research, Vol. 4, No. 11, pp. 6-13.
• 10. Osakuni M.U., Abam T.K. (2004). Shallow resistivity measurement for cathodic protection of pipelines in the Niger Delta. Journal of Environmental Geology, Vol. 45, No. 6, pp. 747-752

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).