Crevice Corrosion of Duplex Stainless Steels by Cyclic Potentiodynamic Polarization and Potentiostatic Techniques

Abstract:

Crevice corrosions of duplex stainless steels were investigated under the aggressive condition of sea water pumps in offshore petroleum platforms. The study aims to compare crevice corrosion behavior of three grades of duplex stainless steels, UNS S32101 (2101), UNS S31803 (2205) and UNS S32750, in seawater with 200 ppm of hypochlorite. Duplex steels were compared with a widely used austenitic steel UNS S31603 (316). Specimens were tested under synthetic sea water prepared at pH4, pH6 and pH8 by the cyclic potentiodynamics polarization technique and the potentiostatic technique. The results show that the duplex stainless steels had higher corrosion resistance compared with the 316. The released charges and the corrosion rates of the 2101 and the 2205 were similar, but much lower than those of the 2507especially after 3 months period.

• Periodical: Key Engineering Materials (Volume 728)
• Pages: 123-128
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.728.123
• Online since: January 2017
• Authors: Pornsak Srisungsitthisunti*, Siriporn Daopiset, Noparat Kanjanaprayut
• Keywords: Crevice Corrosion, Duplex Stainless Steels, Potentiostatic

References

[1] P. Lacombe, B. Baroux, G. Beranger, Stainless Steels - Les Editions de Physique Les Ulis, Paris, (1993).

[2] Z. Szklarska-Smialowska, Pitting and Crevice Corrosion, NACE International The Corrosion Society, Texas, (2005).

[3] B. Pierozynski, I. M. Kowalski, Influence of Hypochlorite-Based Disinfectants on the Pitting Corrosion of Welded Joints of 316L Stainless Steel Reactor, Int J Electrochem Sci. 6 (2011) 3913-3921.

DOI: 10.1016/s1452-3981(23)18299-x

[4] N.J. Laycock, J. Stewart, R.C. Newman, The Initiation of Crevice Corrosion in Stainless Steels, Corros Sci. 39 (1997) 1791-1809.

DOI: 10.1016/s0010-938x(97)00050-4

[5] Y.Z. Yang, Y.M. Jian, J. Li, In situ investigation of crevice corrosion on UNS S32101 duplex stainless steel in sodium chloride solution , Corros Sci. 76 (2013) 163–169.

DOI: 10.1016/j.corsci.2013.06.039

[6] Q. Hu, G. Zhang, Y. Qiu, Z. Guo, The crevice corrosion behavior of stainless steel in sodium chloride solution, Corros Sci. 53 (2011) 4065-4072.

DOI: 10.1016/j.corsci.2011.08.012

[7] B. Cai, Y. Liu, X. Tian, F. Wang, H. Li, R. Ji, An experimental study of crevice corrosion behavior of 316L stainless steel in artificial seawater, Corros Sci. 52 (2010) 3235 – 3242.

DOI: 10.1016/j.corsci.2010.05.040

[8] A. Kocijan, C. Donik, M. Jenko, The corrosion behavior of duplex stainless steel in chloride solutions studied by XPS, Mater tech. 44 (2009) 195–199.

DOI: 10.1016/j.corsci.2009.01.021

[9] L.Q. Guo, M.C. Lin, L.J. Qiao, A. A. Volinsky, Duplex stainless steel passive film electrical properties studied by in situ current sensing atomic force microscopy, Corros Sci. 78 (2014) 55-62.

DOI: 10.1016/j.corsci.2013.08.031

[10] H. Baba, Y. Katada, Effect of nitrogen on crevice corrosion in austenitic stainless steel, Corros Sci, 48 (2006) 2510–2524.

DOI: 10.1016/j.corsci.2005.09.010

[11] M. A. Rodriguez, Inhibition of localized corrosion in chromium containing stainless alloys, Corros Rev. 30 (2012) 19–32.

[12] S. Daoposet, N. Kanjanaprayut, P. Srisungsitthisunti, R. Tangkwampian, Crevice Corrosion of Duplex Stainless Steels in Sodium Chloride Solution, J. Sci Technol. 53 (2015) 11-19.