Use of impedance spectroscopy for evaluating pipe steel susceptibility towards hydrogenation and hydrogen cracking
- 84 Downloads
Impedance spectroscopy is used for different melts of steel 09GSF to show the difference in behavior of steel with and without hydrogenation. An equivalent circuit is proposed describing satisfactorily the impedance spectra obtained, and its parameters R p , R ct , R s , CPE_dl are determined. A correlation is found between steel susceptibility to hydrogen cracking (CLR) and impedance parameters R p and R ct . Values of R p and R ct increase linearly with an increase in CLR. The possibility is demonstrated of using impedance spectroscopy for evaluating steel susceptibility towards hydrogenation and hydrogen cracking.
Keywordselectrochemical impedance spectroscopy EIS steel 09GSF hydrogenation hydrogen-induced cracking (HIC)
- 1.NACE Standard TM 0177–2006, Standard Test Method. Laboratory Testing of Metals for Resistance to Sulfide Cracking under Stress and Corrosion Cracking under Stress in H 2 S-Containing Media.Google Scholar
- 2.E. Barsoukov and J. R. MacDonald, Impedance Spectroscopy: Theory, Experiment, and Application, Wiley-Interscience (2005).Google Scholar
- 3.Z. B. Stoinov, B. M. Grafov, B. Savova-Stoinova, and V. V. Elkin, Electrochemical Impedance [in Russian], Nauka, Moscow (1991).Google Scholar
- 4.A. A. Klyuev, Z. A. Rotenberg, and V. V. Batrakov, “Impedance of passive iron electrode in the presence of reducing agent solution,” Elektrokhimiya, 41, 97–101 (2005).Google Scholar