ABSTRACT Corrosion characteristic of selected ferrous metal samples (plain and alloyed ductile iron, low
carbon steel and austenitic stainless steel) in crude oil was investigated using weight loss
method. The microstructures of the coupons were taken before and after corrosion test. It was
observed that all the materials experience gain in weight within the first 10 days in the medium.
This weight gain is attributed to the formation of hard and passive phases which acted as strong
protective barriers to corrosion. It was also observed that the rate of corrosion decreased with
increase in the number of days of exposure for all the coupons, this may be probably due to the
deposition of corrosion products that tend to shield the corroding surface from further corrosion
attack, there by depressing the rate of corrosion. This result shows that despite initial low
corrosion resistance of plain ductile iron, it can still be considered, alongside other materials,
for application in pipelines and storage facilities for crude oil.
Cite this paper
O. Ogundare, I. Momoh, O. Akinribide, A. Adetunji, J. Borode, S. Olusunle and O. Adewoye, "Comparative Study of Corrosion Sensitivity of Selected Ferrous Metals in Crude Oil," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 6, 2012, pp. 559-568. doi: 10.4236/jmmce.2012.116040.
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