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Study of Intergranular Corrosion in Austenitic Stainless Steels Using Electrochemical Impedance Spectroscopy

Authors: Satish Kolli, Adriana Ferancova, David Porter, Jukka Kömi


Electrochemical impedance spectroscopy (EIS) has been used to detect sensitization in austenitic stainless steels that are heat treated in the temperature regime 600-820 °C to produce different degrees of sensitization in the material. The tests were conducted at five different DC potentials in the transpassive region. The quantitative determination of degree of sensitization has been done using double loop electrochemical potentiokinetic reactivation tests (DL-EPR). The correlation between EIS Nyquist diagrams and DL-EPR degree of sensitization values has been studied. The EIS technique can be used as a qualitative tool in determining the intergranular corrosion in austenitic stainless steels that are heat treated at a given temperature.

Keywords: Electrochemical impedance spectroscopy, intergranular corrosion, sensitization, stainless steel.

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[1] V. Ĉíhal, I. Kašová, Relation between carbide precipitation and intercrystalline corrosion of stainless steels, Corros. Sci. 10 (1970) 875–881. doi:10.1016/S0010-938X(70)80106-8.
[2] V. Kain, R. C. Prasad, P. K. De, Detection of sensitization and intergranular corrosion of Fe-Cr-Ni alloys, High Temp. Mater. Process. 16 (1997) 183–199. doi:10.1515/HTMP.1997.16.3.183.
[3] H. Hanninen, Intergranular Stress Corrosion Cracking, Final Report of the NKA Project, 1989.
[4] EN ISO 12732:2008: E, Corrosion of metals and alloys - Electrochemical potentiokinetic reactivation measurement using the double loop method (based on Cihal’s method) (ISO 12732:2006), Finnish Stand. Assoc. SFS. (2008) 14.
[5] Y. Huang, H. Shih, H. Huang, J. Daugherty, S. Wu, S. Ramanathan, C. Chang, F. Mansfeld, Evaluation of the corrosion resistance of anodized aluminum 6061 using electrochemical impedance spectroscopy (EIS), Corros. Sci. 50 (2008) 3569–3575. doi:10.1016/j.corsci.2008.09.008.
[6] C. Huang, Y. Chang, S. C. Chen, The electrochemical behavior of austenitic stainless steel with different degrees of sensitization in the transpassive potential region in 1 M H 2 SO 4 containing chloride, 46 (2004) 1501–1513. doi:10.1016/j.corsci.2003.09.020.
[7] Z. Sharer, J. Sykes, Progress in Organic Coatings Insights into protection mechanisms of organic coatings from thermal testing with EIS, Prog. Org. Coatings. 74 (2012) 405–409. doi:10.1016/j.porgcoat.2011.12.002.
[8] N. Parvathavarthini, U. K. Mudali, Electrochemical techniques for estimating the degree of sensitization in austenitic stainless steels, Corros. Rev. 32 (2014) 183–225. doi:10.1515/corrrev-2014-0029.
[9] A. P. Majidi, M. A. Streicher, Double Loop Reactivation Method for Detecting Sensitization in Aisi 304 Stainless Steels., Corrosion. 40 (1984) 584–593. doi:10.5006/1.3581921.
[10] S. Rahimi, D. L. Engelberg, T. J. Marrow, A new approach for DL-EPR testing of thermo-mechanically processed austenitic stainless steel, Corros. Sci. 53 (2011) 4213–4222. doi:10.1016/j.corsci.2011.08.033.
[11] A. Barbucci, G. Cerisola, P. L. Cabot, Effect of Cold-Working in the Passive Behavior of 304 Stainless Steel in Sulfate Media, (2002) 534–542. doi:10.1149/1.1516774.
[12] K. M. Behbahani, M. Pakshir, Effect of Different Degrees of Sensitization on the EIS Response of 316L and 316 SS in Transpassive Region, 23 (2014) 2283–2292. doi:10.1007/s11665-014-1018-4.
[13] K. M. Behbahani, M. Pakshir, The Effect of Solution Annealing on the EIS Response of AISI 316 SS with Different Degrees of Sensitization in the Transpassive Region 1, 51 (2015) 1027–1033. doi:10.1134/S2070205115060039.
[14] K. M. Behbahani, M. Pakshir, Z. Abbasi, P. Najafisayar, Damage mechanism at different transpassive potentials of solution-annealed 316 and 316l stainless steels, 22 (2015) 45–51. doi:10.1007/s12613-015-1042-x.
[15] K. M. Behbahani, P. Najafisayar, M. Pakshir, Study of the Intergranular Corrosion of Sensitized UNS S31803 Stainless Steel in Transpassive Region, J. Mater. Eng. Perform. 25 (2016) 3418–3429. doi:10.1007/s11665-016-2176-3.