Abstract
A drainpipe of a gas–steam turbine combined cycle power plant leaked after served for only 64 months. The chemical compositions, metallographic structure and mechanical properties were qualified, and therefore, the leakage was not caused by material quality. The comprehensive analysis of leakage morphology and deposition revealed that the leakage was caused by under-deposit corrosion. The decarburization of metallographic structure was not detected, which indicated that H generated by cathodic reaction has not occurred, so that the under-deposit corrosion caused by H+ was ruled out. The deposition was the iron oxides. The substances (mainly Na3PO4) used for chemical cleaning absorbed in deposition resulted in occluded alkaline electrolyte and damaged the protective film of pipe wall, and electrochemical corrosion process caused the drainpipe failure subsequently. The process and mechanism of pipe wall thinning and leakage in the working medium without heating concentration and corrosion substances were revealed. The preventive suggestions were also proposed for such a failure.
Similar content being viewed by others
References
J. Christian, Gas–steam turbine combined cycle power plants NASA STI/Recon Technical Report N. 28775 (1978).
M. Jonsson, J. Yan, Humidified gas turbines—a review of proposed and implemented cycles. Energy. 30(7), 1013–1078 (2005)
M. Maheshwari, O. Singh, Comparative evaluation of different combined cycle configurations having simple gas turbine, steam turbine and ammonia water turbine. Energy. 168, 1217–1236 (2019)
Y.N. Zhang, T.L. Wang, X. Han, Z.M. Wang, J. Zhang, Corrosion of artificial rock layer covered steel electrodes in a CO2 environment: The influence of permeability. Corros. Sci. 105, 190–201 (2016)
J. Rouhi, Development of iridium oxide sensor for surface pH measurement of a corroding metal under deposit. Int. J. Electrochem. Sci. 12, 9933–9943 (2017)
G.R. Engelhard, L.G. Mcmillion, D.D. Macdonald, A mathematical model for crevice corrosion under porous deposits. J. Nucl. Mater. 379(1–3), 48–53 (2008)
Y. Gan, Y. Li, H.C. Lin, Experimental studies on the local corrosion of low alloy steels in 3.5% NaCl. J. Chin. Soc. Corr. Pro. 43(3), 397–411 (2001)
X.L. Yang, J.L. Fei, S.H. Wang, Y. Gong, Z.G. Yang, Failure analysis on synergistic effect of erosion and corrosion on failed fittings in specialty chemical plant. Part I: Elbows. Mater. Corros. 70, 906–920 (2018)
M. Zhu, G. Ou, H. Jin, K. Wang, Z. Zheng, Top of the REAC tube corrosion induced by under deposit corrosion of ammonium chloride and erosion corrosion. Eng. Fail. Anal. 57, 483–489 (2015)
Z. Zheng, G. Ou, H. Ye, J. Tan, H. Jin, Analysis on the under deposit corrosion of air cooler tubes: Thermodynamic, numerical and experimental study. Eng. Fail. Anal. 79, 726–736 (2017)
S. Hao, G. Zhang, X. Jia, J. Zheng, Cause analysis of new water wall tube hydrogen corrosion-bursting of No.1 Boiler in Yangquan No.2 Power Plant, Electric Power (06) (2000) p 26–28. (in Chinese)
Z. Ahmad, Principles of corrosion engineering and corrosion control. (Butterworth-Heinemann, London, 2006)
GBT 5310-2017 Seamless steel tubes and pipes for high pressure boiler. Chinese standard
A. Ruminski, Failure analysis of a low-temperature carbon steel pipe from a nuclear power station cooling water system. J. Fail. Anal. Prev. 15(4), 534–540 (2015)
H. Hamed, S.A. Mohammad, An investigation on the causes of failure in A210 carbon steel boiler tubes in an oil refinery. J. Fail. Anal. Prev. 18(4), 759–768 (2018)
M. Sabouri, H.R. Faridi, Investigation on corrosion failure of Cr-Mo P11 grade pipe in primary section of a superheated steam generation system. High Temp. 55, 139–144 (2017)
DL/T 794-2012 Guideline for chemical cleaning of fossil plant. Chinese Standard.
X. Gong, Corrosion and protection of thermal equipment, China electric power press. (Beijing, China, 1998) ((in Chinese))
R.B. Dooley, M. Ball, A. Bursik, M. Rzihad, R. Svoboda, Water chemistry in commercial water-steam cycles. (Elsevier Ltd, Amsterdam, 2004)
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Zhang, A., Zhang, Z., Cao, S. et al. A Drainpipe Leakage Caused by Under-Deposit Corrosion in a Gas–Steam Turbine Combined Cycle Power Plant. J Fail. Anal. and Preven. 21, 948–957 (2021). https://doi.org/10.1007/s11668-021-01140-8
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11668-021-01140-8