MIC Behavior of the Low Alloy Steel with Different Zn-Epoxy Coating in SRB Solution

Abstract:

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The microbiological influenced corrosion (MIC) behavior of the low alloy steel with granular-Zn-epoxy and flaky-Zn-epoxy coating in the sulfate-reducing bacteria (SRB) solution was investigated with electrochemical impedance spectroscopy (EIS), X-rays diffraction (XRD), scanning electron microscope (SEM) etc. Results show that the protection effect of the flaky-Zn coating specimen is much better than the granular-Zn coating one. The dissolution of zinc is more severe in granular-Zn coating than in flaky-Zn coating when the specimen immersed in the SRB solution. The shielding property of flaky zinc is much higher than granular zinc in the coating. The flaky-Zn coating is much more compact than the granular-Zn coating and therefore the property of anti-infiltration is much better. We may conclude that the flaky-Zn coating exhibited more favorable corrosion resistance property than the granular one.

Info:

Periodical:

Key Engineering Materials (Volumes 488-489)

Edited by:

Z. Tonković and M.H. Aliabadi

Pages:

262-265

DOI:

10.4028/www.scientific.net/KEM.488-489.262

Citation:

J. Wang et al., "MIC Behavior of the Low Alloy Steel with Different Zn-Epoxy Coating in SRB Solution", Key Engineering Materials, Vols. 488-489, pp. 262-265, 2012

Online since:

September 2011

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Price:

$35.00

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