Corrosion Fatigue Characteristics of Artificially Degraded CF8A Steel in 3.5 WT.% NaCl Solution

Abstract:

CF8A steel is a material of the piping system in nuclear power plant. In order to evaluate its fracture characteristics and degradation by corrosion, electrochemical corrosion and corrosion fatigue characteristics were evaluated. CF8A steel was artificially degraded at 400°C for 3 months. Corrosion rate of degraded CF8A steel in NaCl solution of room temperature increases with concentration of NaCl solution increase. However, concentration of NaCl solution will be more than 4.0wt.%, it shows decreasing tendency. Crack growth rates of degraded and not-degraded CF8A steel in air condition do not show remarkable difference. However, in 3.5wt.% NaCl solution, it showed higher than that of in air.

• Periodical: Key Engineering Materials (Volumes 321-323)
• Pages: 611-614
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.321-323.611
• Online since: October 2006
• Authors: Seong Cheol Jang, Dong Ho Bae, Gyu Young Lee
• Keywords: Corrosion, Corrosion Fatigue, Corrosion Rate, Crack Growth Rate (da/dN), Degradation, Electrochemical Reaction

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