Browse > Article
http://dx.doi.org/10.5516/NET.2009.41.10.1315

INTERPRETATION OF ELECTROCHEMICAL NOISE PARAMETERS AS INDICATORS OF INITIATION AND PROPAGATION OF SCC OF AN ALLOY 600 SG TUBE AT HIGH TEMPERATURES  

Kim, Sung-Woo (Korea Atomic Energy Research Institute)
Kim, Hong-Pyo (Korea Atomic Energy Research Institute)
Publication Information
Nuclear Engineering and Technology / v.41, no.10, 2009 , pp. 1315-1322 More about this Journal
Abstract
The present article is concerned with the application of an electrochemical noise (EN) monitoring technique to analyze the initiation and propagation of Pb-assisted stress corrosion cracking (SCC) of an Alloy 600 material in a simulated environment of a steam generator (SG) sludge pile at high temperatures. A typical increase of electrochemical current noise (ECN) and electrochemical potential noise (EPN) was frequently recorded from the EN measurement in a caustic solution with such impurities as PbO and CuO, indicating that there are localized corrosion events occurring. With the aid of microscopic and spectral analyses, the EN data involving information on such stochastic processes as uniform corrosion and the initiation and propagation of SCC, were analyzed based on a stochastic theory.
Keywords
Alloy 600; Electrochemical Noise; Electrochemical Current Noise; Electrochemical Potential Noise; Stress Corrosion Cracking; Steam Generator Tube;
Citations & Related Records

Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
연도 인용수 순위
1 R.J. Jacko, “Corrosion Evaluation of Thermally Treated Alloy 600 Tubing in Primary and Faulted Secondary Water Environments”, EPRI NP-6721, Pittsburgh, Pennsylvania (1990)
2 S.S. Hwang, H.P. Kim, D.H. Lee, U.C. Kim and J.S. Kim, “The mode of stress corrosion cracking in Ni-base alloys in high temperature water containing lead”, J. Nucl. Mater., 275, 28 (1999)   DOI   ScienceOn
3 H.P. Kim, S.S. Hwang, J.S. Kim and J.H. Hwang, “Stress corrosion cracking of steam generator tubing materials in lead containing solution”, Proc. of the 13th Int. Conf. on Environmental Degradation of Materials in Nuclear Power Systems, Whistler, Canada, Aug. 19-23, 2007
4 H.A.A. Al-Mazeedi and R.A. Cottis, “A practical evaluation of electrochemical noise parameters as indicators of corrosion type”, Electrochim. Acta, 49, 2787 (2004)   DOI   ScienceOn
5 J.M. Sanchez-Amyay, R.A. Cottis and F.J. Botana, “Shot noise and statistical parameters for the estimation of corrosion mechanisms”, Corros. Sci., 47, 3280 (2005)   DOI   ScienceOn
6 K.H. Na, S.I. Pyun and H.P. Kim, “Analysis of electrochemical noise obtained from pure aluminium in neutral chloride and alkaline solutions”, Corros. Sci., 49, 220 (2007)   DOI   ScienceOn
7 T. Sakai, S. Okabayashi, K. Aoki, K. Matsumoto and Y. Kishi, “A study of oxide thin film of Alloy 600 in high temperature water containing lead”, Corrosion/90, paper no. 520, NACE, Houston (1990)
8 S.W. Kim and H.P. Kim, “Electrochemical noise analysis of PbSCC of Alloy 600 SG tube in caustic environments at high temperature”, Corros. Sci., 51, 191 (2009)   DOI   ScienceOn
9 J. Stewart, D. B. Wells, P. M. Scott and D. E. Williams, “Electrochemical noise measurements of stress corrosion cracking of sensitised austenitic stainless steel in high-purity oxygenated water at 288 ${^{\circ}C}$”, Corros. Sci., 33, 73 (1992)   DOI   ScienceOn
10 R.A. Cottis, M.A.A. Al-Awadhi, H. Al-Mazeedi and S. Turgoose, “Measures for the detection of localized corrosion with electrochemical noise”, Electrochim. Acta, 46, 3665 (2001)   DOI   ScienceOn
11 S.S. Hwang, U.C. Kim and Y .S. Park, “The effects of Pb on the passive film of Ni-base alloy in high temperature water”, J. Nucl. Mater., 246, 77 (1997)   DOI   ScienceOn
12 U.C. Kim, K.M. Kim and E.H. Lee, “Effects of chemical compounds on the stress corrosion cracking of steam generator tubing materials in a caustic solution”, J. Nucl. Mater., 341, 169 (2005)   DOI   ScienceOn
13 K.H. Na, S.I. Pyun and H.P. Kim, “Effects of NiB, PbO, and TiO2 on SCC of sensitized Inconel Alloy 600 in RT-tetrathionate solution”, J. Electrochem. Soc., 154, C349 (2007)   DOI   ScienceOn
14 R.A. Cottis, “Interpretation of electrochemical noise data”, Corrosion, 57, 265 (2001)   DOI   ScienceOn
15 D.J. Kim, H.C. Kwon and H.P. Kim, “Effects of the solution temperature and the pH on the electrochemical properties of the surface oxide films formed on Alloy 600”, Corros. Sci., 50, 1221 (2008)   DOI   ScienceOn
16 K.H. Na and S.I. Pyun, “Effects of sulphate, nitrate and phosphate on pit initiation of pure aluminium in HCl-based solution”, Corros. Sci., 49, 2663 (2007)   DOI   ScienceOn