THE STRENGTH OF CORROSIVE PROPERTIES OF CRUDE OILS ON FERROUS METALS

Suresh Aluvihara, Jagath K. Premachandra

Abstract


Crude oil is an unrivaled earth resource for the most of industrial applications. In the refining process of crude oil, ferrous metals play a severe role against the harsh environment while confronting adverse influences of crude oils such as the corrosion of ferrous metals. The formation of metal oxides, sulfides, hydroxides or any compound related with carboxylic group on the metal surface is known as the corrosion also mainly depends on the sulfur content, acidity, salt content and mercaptans content of relevant crude oils as well as the chemical composition of the metal. In this research it was expected to speculate the effect of such corrosive properties of Murban and Das Blend crude oils on seven different types of ferrous metals which are used in crude oil refining industry of Sri Lanka. The sulfur content, salt content, acidity and mercaptans content of each crude oil were determined by the succession of XRF analyzer, analyzer of salt and titration methods. A range of similar sized pieces of seven different types of ferrous metals were immersed in both crude oils separately and their corrosion rates were determined after 15, 30 and 45 days from the immersion by the weight loss method while observing the corroded metal surfaces under the optical microscope. The metallic concentrations in both crude oil samples after the experiment were tested by the AAS. It was found that the higher content of sulfur, acidity, mercaptans and lower content of salt in the Das blend than the Murban. According to the corrosion rates of metals, four types of metals showed higher rate of corrosion in Murban while other metals are showing higher corrosion rate in Das blend also higher metallic concentrations were obtained from Murban crude oil samples than Das Blend crude oil samples in the analysis of the AAS.


Keywords


Murban; Das Blend; corrosive properties; ferrous metals; weight loss; corrosion

Full Text:

PDF

References


Khana, O. P. (2009). Materials Science and Metallurgy. New Delhi: Dhanpet Rai and Sons publication.

Fahim, M. A., Alsahhaf, T. A., Elkilani, A. (2010). Fundamentals of Petroleum Refining. Elsevier, 516. doi: https://doi.org/10.1016/c2009-0-16348-1

Calister, W. D. (2003). An Introduction of Materials Science and Engineering. New York: John Wiley and Sons, 820.

Davis, M. E., Davis, R. J. (2003). Fundamentals of Chemical Reaction Engineering. New York: McGraw-Hill.

Singh, R. (2006). Introduction to Basic Manufacturing Process and Engineering Workshop. New Delhi: New Age International Publication, 475.

Bolton, W. (1993). Engineering Materials Technology. Elsevier, 468. doi: https://doi.org/10.1016/c2013-0-04622-1

Ajimotokan, H. A., Badmos, A. Y., Emmanuel, E. O. (2009). Corrosion in Petroleum Pipelines. New York Science Journal, 2 (5), 36–40.

Speight, J. G. (1999). The Chemistry and Technology of Petroleum. Boca Raton, 934. doi: https://doi.org/10.1201/9780824742119

Afaf, G. A. (2007). Corrosion Treatment of High TAN Crude. Khartoum.

Okpokwasili, G. C., Oparaodu, K. O. (2014). Comparison of Percentage Weight Loss and Corrosion Rate Trends in Different Metal Coupons from two Soil Environments. International Journal of Environmental Bioremediation & Biodegradation, 2 (5), 243–249.

Usman, A. D., Okoro, L. N. (2015). Mild Steel Corrosion in Different Oil Types. International Journal of Scientific Research and Innovative Technology, 2 (2), 9–13.

Ahmed, I. M., Elnour, M. M., Ibrahim, M. T. (2014). Study the Effects of Naphthenic Acid in Crude Oil Equipment Corrosion. Journal of Applied and Industrial Sciences, 2 (6), 255–260.

Rickard, D., Luther, G. W. (2007). Chemistry of Iron Sulfides. Chemical Reviews, 107 (2), 514–562. doi: https://doi.org/10.1021/cr0503658

Fang, H., Nesic, S., Young, D. (2008). Corrosion of Mild Steel in the Presence of Elemental Sulfur. International Corrosion Conference and Expo.

Bota, G. M., Nesic, S., Qu, D., Wolf, H. A. (2010). Naphthenic Acid Corrosion of Mild Steel in the Presence of Sulfide Scales Formed in Crude Oil Fractions at High Temperature. International Corrosion Conference and Expo.




DOI: http://dx.doi.org/10.21303/2461-4262.2018.00792

Refbacks

  • There are currently no refbacks.




Copyright (c) 2018 Suresh Aluvihara, Jagath K. Premachandra

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

ISSN 2461-4262 (Online), ISSN 2461-4254 (Print)