JMMCE  Vol.4 No.2 , October 2005
Electrochemical Impedance Spectroscopy Of Epoxy-Coated Steel Exposed To Dead Sea Water
Author(s) Sami Masadeh*
ABSTRACT
Electrochemical impedance tests were applied to steel specimens which were coated by epoxy and tested after immersion in Dead Sea water for different periods at room temperature and at 50C. Results taken from Nyquist and Bode plots and as were analyzed by means of software provided with the instrument. Results were presented as the values of capacitance and resistance (Cdl and Rct). Results show that degradation occurred after immersion in the test solution, and were more severe at higher temperature. Specimens were examined under scanning electron microscope, and micrographs showed clear rupture and degradation in epoxy coatings.

Cite this paper
S. Masadeh, "Electrochemical Impedance Spectroscopy Of Epoxy-Coated Steel Exposed To Dead Sea Water," Journal of Minerals and Materials Characterization and Engineering, Vol. 4 No. 2, 2005, pp. 75-84. doi: 10.4236/jmmce.2005.42007.
References
[1]   S. J. Downey, O. F. Devereux, Corrosion 45, 675 (1989)

[2]   J. R. Scully, J. Electrochem. Soc. 136, 979 (1989)

[3]   H. Leidheiser Jr., Coatings Technology, 63, 21 (1991)

[4]   E. Frechette, C. Compere, E. Ghali, Corros. Sci. 33, 1067 (1992)

[5]   S. A. McCluny, S. N. Popova, B. N. Popov, R. E. white, J. Electrochem. Soc. 139,1556 (1992) Figure 22: Scanning electron micrograph of epoxy coating after immersion for 50 days in Dead Sea water at 50 C

[6]   P. R. Roberge, E. Halliop, V. S. Sastri, Corrosion, 48, 447 (1992)

[7]   J.R. Scully and S.T. Hensley, Corrosion, 50, 705 (1994)

[8]   D. F. Wei, I. Chatterjee, and D. A. Jones, Corrosion, 51, 97 (1994)

[9]   F. Deflorian and L. Fedrizzi, J. Adhesion Sci. Technol , 13, 629 (1999)

[10]   C. H. Tsai and F. Mansfield, Corrosion Sci., 726 (1993)

[11]   F Mansfield, M. W. Kendig and S. Tsai, Corrosion, 38, 478 (1982)

[12]   J. E. G. Gonzalez and J. C. Mirza Rosca, J. Adhesion Sci. Technolo.,13, 379 (1999)

[13]   G. Walter, Corrosion Sci., 32, 1041 (1991)

[14]   L. Beaunier, I. Epelboin, J. C. Lestrade, H. Takenouti, Surf. Technol. 4, 237(1976)

[15]   F. MAnsfeld, M. W. Kendig, S. Tsai, Corrosion, 38, 478(1982)

[16]   G. W. Walter, Corros. Sci. 26, 681 91986)

[17]   D. F. Wei, I. Chatterjee, D. A. Jones, Corrosion, 51, 97(1995)

[18]   E. M. Geenen, E. P. M. van Westing, J. H. W. de Wit, Porg. Org. Coat. 18, 295(1990)

[19]   G. W. Walter, Corros. Sci. 32, 1041(1991)

[20]   E. P. M. van Westing, G. M. Ferrari, E. M. Geenen, J. H. W. de Wit, Prog. Org. Coat.23, 83(1993)

 
 
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