Effect of YbCl₃-Zn-Epoxy Coating on MIC Behavior of Low Alloy Steel

Abstract:

In the present study, the rare earths element YbCl₃ was added into the Zn-epoxy coating, and the MIC behavior of the low alloy steel specimen with YbCl₃-Zn-epoxy coating in the sulfate-reducing bacteria (SRB) solution was investigated and compared with the specimen of Zn-epoxy coating. Experimental results show that both the YbCl₃-Zn-epoxy and Zn-epoxy coating may offer effective protection for the basic low alloy steel. However, the corrosion potential of the specimen with YbCl₃-Zn epoxy coating was obviously higher than the Zn-epoxy coating, suggesting that the YbCl₃-Zn-epoxy coating may offer more favorable protection. Results of X-rays diffraction (XRD) and surface micrographs of specimens show that more sulfides and corrosion products of YbCl₃-Zn-epoxy coating were produced which increased the shielding property of the coating. The mechanism about the effect of YbCl₃-Zn-epoxy coating on MIC behavior was further discussed.

• Periodical: Key Engineering Materials (Volumes 488-489)
• Pages: 250-253
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.488-489.250
• Online since: September 2011
• Authors: Yu Dong Fu, Qing Fen Li, Jun Wang, Chun Hui Li
• Keywords: Low Alloy Steel, Marine Environment, Microbiological Influenced Corrosion (MIC), YbCl₃-Zn-Epoxy Coating

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