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Abstract
The aim of this research is to calculate mass transfer coefficient, kd, during cathodic protection of low carbon steel in neutral seawater (3.5% W/V NaCl in distilled water with pH = 7). Two types of cathodic protection were used:
First: Sacrificial anode cathodic protection (SACP) were a pipeline of steel carrying seawater using zinc as a sacrificial anode and with variable temperatures ranged (0 – 45oC) and volumetric flow rate ranged (5 – 900 lit/hr). It was found that the kd increases with increasing temperature and volumetric flow rate of seawater, where kd ranged (0.24×10-6 – 41.6×10-6 m/s).
Second: Impressed current cathodic protection (ICCP) technique adopting a rotating vertical steel cylinder in seawater with variable temperatures ranged (0 – 45oC) and rotating velocity ranged (0 – 400 rpm). It was found that the kd increases with increasing temperature and rotating velocity, where kd ranged (7.25×10-6 – 36.82×10-6 m/s).
References
[2] Anderko, A., McKenzie, P. and Young, R. D. (2001), "Computation of rates of general corrosion using electrochemical and thermodynamic modes corrosion".
[3] Berger, F. P., Hau, K-F. F. L. (1977), Int. J. Heat Mass Transfer, 20, pp 1185-1194.
[4] Champion, F. A. (1964), "Corrosion testing procedures", 2nd edition.
[5] Coast Guard U.S. (1999), Chemical Hazardous Response Information System (CHRIS), selected properties of fresh water, seawater, ice and air.
[6] Cornet I. and Kappesser, R. (1969), "Cathodic protection of a rotating cylinder", Trans.
[7] Instn. Chem. Engrs., 47.
[8] Cottis, R. A. (2002), "Electrochemical kinetics and thermodynamics".
[9] Coulson, J. M. and Richardson, J. F. "Chemical engineering", Vol. 1 (1999) and vol. 2 (2002).
[10] Cussler, E. L. (1984), "Mass transfer in fluid systems", Cambridge University press, Cambridge, UK.
[11] Eisenberg, M., Toblas, C. W. and Wilke, R. C. (1954), J. Electrochemical Society, 101 (6), pp 306-319.
[12] Fontana, M. G. and Greene, N. D. (1984), "Corrosion engineering", 2nd edition, McGraw-Hill.
[13] Gabe, D. R. and Makanjoula, P. A. (1986), EFCF Publication Series No. 15, "electrochemical engineering", AIChE Symposium Series, (98), p. 309.
[14] Hanson, H. R. (2000), "Offshore cathodic protection guidelines: relevance of short term laboratory testing". (Internet site: www.corrosionsource.com).
[15] Harvey, P. H. and Robert J. G. (1988), paper no. 38, Corrosion 88, March 21-25.
[16] Konsowa, A. H. and El-Shazly, A. A. (2002), Elsevier, Desalination, 153, pp 223-226.
[17] Roberge, R. P. (1999), "Handbook of corrosion engineering".
[18] Roberge, R. P. (2004), "Electrochemical kinetics principles nearest diffusion layer ". (internet site: www.corrosiondoctor.org)
[19] Scully, J. C. (1975), "The fundamental of corrosion", 2nd edition.
[20] Shrier (1), L. L. (1976), "Corrosion 1, metal/environment reactions", Newnes-Butterworth.
[21] Shrier (1), L. L. (2000), "Corrosion 1, metal/environment reactions", Newnes-Butterworth.
[22] Shrier (2), L. L. (2000), "Corrosion 2, corrosion control", 3rd edition, Newnes-Butterworth.
[23] Trethewey, K. R. and Chamberlain, J. (1996), "Corrosion for scientist and engineering", 2nd edition.
[24] Uhlig, H. H. (1971), "Corrosion and corrosion control, an introduction to corrosion science and engineering", John-Wiley and Sons.
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