Nuclear Engineering and Technology

  • 제41권10호
  • /
  • Pages.1315-1322
  • /
  • 2009
  • /
  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
권호 표지
DOI QR코드

DOI QR Code

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

  • 발행 : 2009.12.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

  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. 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)
  3. 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) https://doi.org/10.1016/S0022-3115(97)00023-8
  4. 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) https://doi.org/10.1016/S0022-3115(99)00111-7
  5. 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
  6. 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) https://doi.org/10.1016/j.corsci.2008.01.008
  7. 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) https://doi.org/10.1016/j.corsci.2008.10.014
  8. 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) https://doi.org/10.1016/0010-938X(92)90018-X
  9. 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) https://doi.org/10.1016/S0013-4686(01)00645-4
  10. R.A. Cottis, “Interpretation of electrochemical noise data”, Corrosion, 57, 265 (2001) https://doi.org/10.5006/1.3290350
  11. 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) https://doi.org/10.1016/j.electacta.2004.01.040
  12. 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) https://doi.org/10.1016/j.corsci.2005.05.047
  13. 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) https://doi.org/10.1016/j.corsci.2006.05.018
  14. 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) https://doi.org/10.1016/j.corsci.2006.12.012
  15. 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) https://doi.org/10.1149/1.2734862
  16. 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) https://doi.org/10.1016/j.jnucmat.2005.01.018

피인용 문헌

  1. Laboratorial technique for fabrication of outer diameter stress corrosion cracking on steam generator tubing vol.13, pp.3, 2014, https://doi.org/10.14773/cst.2014.13.3.112
  2. Ex situ and in situ characterization of stress corrosion cracking of nickel-base alloys at high temperature vol.18, pp.2, 2014, https://doi.org/10.1007/s10008-013-2248-3
  3. Detection of corrosion degradation using electrochemical noise (EN): review of signal processing methods for identifying corrosion forms pp.1743-2782, 2016, https://doi.org/10.1179/1743278215Y.0000000057