Study of the Effect of Crude Oils on the Metallic Corrosion

Suresh Aluvihara; Jagath K Premachandra

doi:10.21467/ajgr.5.1.43-54

Authors

Suresh Aluvihara Department of Science and Technology, Uva Wellassa University, Badulla, Sri Lanka
Jagath K Premachandra Department of Chemical and Process Engineering, University of Moratuwa, Katubedda, Sri Lanka

DOI:

https://doi.org/10.21467/ajgr.5.1.43-54

Abstract

Corrosion is a severe matter regarding the most of metal using industries such as the crude oil refining. The formation of the oxides, sulfides or hydroxides on the surface of metal due to the chemical reaction between metals and surrounding is the corrosion that highly depended on the corrosive properties of crude oil as well as the chemical composition of ferrous metals since it was expected to investigate the effect of Murban and Das blend crude oils on the rate of corrosion of seven different ferrous metals which are used in the crude oil refining industry and investigate the change in hardness of metals. The sulfur content, acidity and salt content of each crude oil were determined. A series of similar pieces of seven different types of ferrous metals were immersed in each crude oil separately and their rates of corrosion were determined by using their relative weight loss after 15, 30 and 45 days. The corroded metal surfaces were observed under the microscope. The hardness of each metal piece was tested before the immersion in crude oil and after the corrosion with the aid of Vicker’s hardness tester. The metallic concentrations of each crude oil sample were tested using atomic absorption spectroscopy (AAS). The Das blend crude oil contained higher sulfur content and acidity than Murban crude oil. Carbon steel metal pieces showed the highest corrosion rates whereas the stainless-steel metal pieces showed the least corrosion rates in both crude oils since that found significant Fe and Cu concentrations from some of crude oil samples. The mild steel and the Monel showed relatively intermediate corrosion rates compared to the other types of ferrous metal pieces in both crude oils. There was a slight decrease in the initial hardness of all the ferrous metal pieces due to corrosion.

Keywords:

Crude oils, Corrosive properties, Corrosion, Metals, Hardness

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References

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

A. Alsahhaf, A. Elkilani and M.A. Fahim, Fundamentals of Petroleum Refining, Amsterdam: Radarweg Press, 2010.

W. D. Calister, An Introduction of Materials Science and Engineering, NewYork: John Wiley and Sons, Inc, 2003.

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

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

W. Bolton, Eds., Engineering Materials Technology, London: B. H Newnes Limited, 1994.

H. A. Ajimotokan, A. Y. Badmos and E. O. Emmanuel, “Corrosion in Petroleum Pipelines,” New York Science Journal, vol.2, no.5, pp. 36-40, 2009.

J.G. Speight, Eds., The Chemistry and Technology of Petroleum, New York: Marcel Dekker, 1999.

G. A. Afaf, “Corrosion Treatment of High TAN Crude,” PhD. Thesis, University of Khartoum, Khartoum, Sudan, 2007.

G. C. Okpokwasili and K. O. Oparaodu, “Comparison of Percentage Weight Loss and Corrosion Rate Trends in Different Metal Coupons from two Soil Environments,” International Journal of Environmental Bioremediation & Biodegradation, vol.2, no.5, pp. 243-249, 2014.

A.D. Usman and L.N. Okoro, “Mild Steel Corrosion in Different Oil Types,” International Journal of Scientific Research and Innovative Technology, vol.2, no.2, Feb., pp. 9-13, 2015.

I.M. Ahmed, M.M. Elnour and M.T. Ibrahim, “Study the Effects of Naphthenic Acid in Crude Oil Equipment Corrosion,” Journal of Applied and Industrial Sciences, vol.2, no.6, Dec., pp. 255-260, 2014.

G.W. Luther and D. Rickard, “Chemistry of Iron Sulfides,” Chemical Reviews, vol.107, no.2, pp. 514-562, 2007.

H. Fang, S. Nesic and D. Young, “Corrosion of Mild Steel in the Presence of Elemental Sulfur,” presented at International Corrosion Conference and Expo, 2008.

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