Comparative Assessment of Corrosion Behaviour of MCS and KS7 SS in Saline and Carbonate Environments

O. O. Ajide, K. W. Agara

Department of Mechanical Engineering, University of Ibadan, Nigeria.

DOI: 10.4236/jmmce.2012.118075                

Abstract

The major objective of this experimental study is to investigate and compare the corrosion resistance of medium Carbon steel (MCS) and KS7 stainless steel in saline and sodium carbonate environments. The MCS and KS7 SS were exposed to 0.5 M each of NaCl and Na₂CO₃ solutions for a period of 36 days. The weight loss was taken every 3 days in order to evaluate CPR. The results obtained showed that KS7 SS generally offers a better corrosion resistance than the MCS in the selected media. While MCS is found to be inappropriate alloy in saline and sodium carbonate environments, KS7 SS is an unfailing choice material for manufacturing machines and other engineering amenities in which their service lives are predominant in Na₂CO₃ medium and fairly pleasing in NaCl environment.

Keywords

MCS; KS7 SS; CPR; Saline and Sodium Carbonate

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	C. Berziou, K. Remy, A. Billard and J. Creus, “Corrosion Behaviour of dc Magnetron Sputtered Fe1?xMgx Alloy Films in 3 wt% NaCl Solution,” Corrosion Science, Vol. 49, No. 11, 2007, pp. 4276-4295. doi:10.1016/j.corsci.2007.04.008
[2]	Q. I. Zhang, “Corrosion Assessment of Offshore Oil Pipeline Based on Ultrasonic Technique,” Shanghai Jiao Tong University, Shanghai, 2008.
[3]	D. T. Oloruntoba, O. O. Oluwole and O. Oguntade, “Comparative Study of Corrosion Behaviour of Galvanized Steel and Coated Al 3103 Roofing Sheets in Carbonate and Chloride Environments,” Materials & Design, Vol. 30, No. 4, 2009, pp. 1371-1376.
[4]	S. L. Jason, I. R. Richard, J. L. Edward, U. F. Alexander and J. L. Brenda, “An Evaluation of Carbon Steel Corrosion under Stagnant Seawater Conditions,” Biofouling: The Journal of Bioadhesion and Biofilm Research, Vol. 20, No. 4-5, 2004, pp. 237-247.
[5]	H. M?ller, E. T. Boshoff and H. Froneman, “The Corrosion Behaviour of a Low Carbon Steel in Natural and Synthetic Seawaters,” The Journal of The South African Institute of Mining and Metallurgy, Vol. 106, 2006, pp. 585-592.
[6]	A. C. Ciubotariu, L. Benea and P. L. Bonora, “Corrosion Studies of Carbon Steel X60 by Electrochemical Methods,” Journal of Optoelectronics and Advanced Mate-rials, Vol. 12, No. 5, 2010, pp. 1170-1175.
[7]	F. Deflorian, S. Rossi, B. Tancon and P. L. Bonora, “Corrosion Behaviour of Steel Ropes for Snow and Rockfall Barriers,” Corrosion Engineering, Science and Technology, Vol. 39, No. 3, 2004, pp. 250-254. doi:10.1179/147842204X2853
[8]	J. Hu, D. A. Koleva, J. H. W. de Wit, H. Kolev and K. van Breugel, “Corrosion Performance of Carbon Steel in Simulated Pore Solution in the Presence of Micelles,” Journal of the Electrochemical Society, Vol. 158, No. 3, 2011, pp. C76-C87.
[9]	G. Elnura, “Comparison of Corrosion Resistance of 316 and Different Stainless Steel Grades,” Master Thesis, University of Stavanger, Stavanger, 2011.
[10]	A. Pfennig and A. Kranzmann, “Influence of CO2 on the Corrosion Behaviour of 13Cr Martensitic Stainless Steel AISI 420 and Low-Alloyed Steel AISI 4140 Exposed to Saline Aquifer Water Environment,” Transactions of the Wessex Institute, 2006, 10 p.
[11]	H. H. Uhlig and M. C. Morill, “Corrosion of 18-8 Stainless Steel in Sodium Chloride Solutions,” Industrial & Engineering Chemistry, Vol. 33, No. 7, 1941, pp. 875- 880.
[12]	J. Charles, J. D. Mithieux, J. Krautschick, N. Suutala, S. J. Antonio, S. Van Hecke and T. Pauly, “A New European 200 Series Standard to Substitute 304 Austenitics?” Revue de Métallurgie, Vol. 106, No. 2, 2009, pp. 90-98.