Journal article Open Access

Degradation Propensity of Welded Mild Steel in Coastal Soil of University of Lagos

S. O. Adeosun; O. S. Sanni

Study on corrosion propensity of welded mild steel- bar in soil media around the coastal area of University of Lagos has been carried out using gravimetric method. Six (6) samples each for welded and unwelded mild steels were cut, their initial weights were recorded and buried in two selected soil. The weight losses of these coupons were measured at regular intervals for a period of six months (180 days).

The corrosiveness of the soil media varied widely depending on the potency level of its constituents. The results revealed that soil in the studied area have marked variations in composition and contents. Soil medium with a lower pH and higher chloride ion concentration aggressively attacked the coupons with the welded steel coupon corroding faster than unwelded one. The medium resistivity to the flow of current is another strong factor affecting corrosion rate.

Files (327.0 kB)
Name Size
327.0 kB Download
  • <p>
  • ASTM G46 – 94 (2005): "Standard Guide for Examination and Evaluation of Pitting Corrosion."
  • G. A. Zhang, Y. F. Cheng (2009): "Micro-electrochemical characterization and Mott-Schottky analysis of corrosion of welded X70 pipeline steel in carbonate/bicarbonate solution." Electrochimica Acta 55 (1), pp. 316-324.
  • K. Migiakis, G.D. Papadimitriou (2009): "Effect of nitrogen and nickel on the microstructure and mechanical properties of plasma welded UNS S32760 super-duplex stainless steels." Journal of Materials Science 44 (23), pp. 6372-6383.
  • K.G. Mishra, C.R. Das (1987): "Corrosion of Welded Steel Specimens in Industrial Steel Plant Atmospheres." British Corrosion Journal 22 (3), pp. 195-198.
  • K.J. Matthes, E. Seliga (2004): "Stress-corrosion cracking on beam-welded joints consisting of mild and low-alloy steels." Welding Research Abroad 50 (6-7), pp. 10-15.
  • Robert Baboian (2005): "Corrosion tests and standards: application and interpretation." pp 392 – 393 2nd ed. [10] Technical Manual (1985): "electrical Design, Cathodic Protection" Headquaters Department of the Army, Washington, D.C. 22, No. 5-811-7, pp 13. [11] ASTM G192 – 99 (2004): "Standard Practice for Conducting and Evaluating Laboratory Corrosions Tests in Soils. [12] A.H. Konsowa and A.H. El-Shazly (2002): "Rate of Zinc consumption during sacrificial cathodic protection of pipelines carrying saline water." Desalination, 153(2002), Pp 223-226 [13] S. Syed (2006): "Atmospheric corrosion of materials." Emirates Journal for Engineering Research, 1, Pp 1-24. [14] N.M.A. Eid (1989): &ldquo;Localised corrosion of welds in structural steel under desalination plant conditions.&rdquo; &ndash;Part II: &ldquo;Effect of heat treatment, test temperature and test media.&rdquo; Desalination, 73 (1989), Pp 407-415.</p>
  • S. Pal, T.K. Mitra, P.K. Chakraborty (2004): "Corrosion behaviour of a few micro alloy steels and their welded parts in river and seawater." Bulletin of Electrochemistry 20 (11), pp. 501-505.
  • S.K. Gupta, B.K. Gupta (1979): "The critical soil moisture content in the underground corrosion of mild steel." Corrosion Science, volume 19, issue 3, pp 171-178.
All versions This version
Views 33
Downloads 00
Data volume 0 Bytes0 Bytes
Unique views 33
Unique downloads 00


Cite as