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Research Papers

The Corrosion Behavior of 9Cr Ferritic–Martensitic Heat-Resistant Steel in Water and Chloride Environment

[+] Author and Article Information
Z. Zhang, Z. F. Hu

School of Materials Science and Engineering,
Tongji University,
Shanghai 201804, China

P. M. Singh

School of Materials Science and Engineering,
Georgia Institute of Technology,
Atlanta, GA 30332-0245

Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received July 31, 2014; final manuscript received April 17, 2015; published online May 8, 2015. Assoc. Editor: Georges Cailletaud.

J. Eng. Mater. Technol 137(3), 031009 (Jul 01, 2015) (7 pages) Paper No: MATS-14-1156; doi: 10.1115/1.4030430 History: Received July 31, 2014; Revised April 17, 2015; Online May 08, 2015

The corrosion behavior of 9Cr ferritic–martensitic heat-resistant steel was investigated in water and chloride environment at room temperature (RT). The results of linear polarization, electrochemical impedance spectroscopy (EIS), and potentiodynamics (PD) polarization tests on long-term exposure show that 9Cr ferritic–martensitic steel has weaker corrosion resistance and greater pitting corrosion tendency in higher chloride concentrations. Corresponding scanning electron microscopy (SEM) observation displays that higher concentration chloride promotes the pitting initiation. During long-term exposure, pitting susceptibility decreases, the average pit size increases, and the density declines in higher chloride concentrations. Pits in the grains and along the grain boundaries are observed by optical microscope (OM), and it indicates that inclusions in grains and carbide particles at grain boundaries are the sites susceptible to pitting initiation.

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References

Yi, Y., Lee, B., Kim, J., and Jang, J., 2006, “Corrosion and Corrosion Fatigue Behaviors of 9Cr Steel in a Supercritical Water Condition,” Mater. Sci. Eng., A, 429(1–2), pp. 161–168. [CrossRef]
Toloczko, M. B., Hamilton, M. L., and Maloy, S. A., 2003, “High Temperature Tensile Testing of Modified 9Cr-1Mo After Irradiation With High Energy Protons,” J. Nucl. Mater., 318, pp. 200–206. [CrossRef]
Ennis, P. J., and Czyrska-Filemonowicz, A., 2003, “Recent Advances in Creep-Resistant Steels for Power Plant Applications,” Sadhana, 28(3–4), pp. 709–730. [CrossRef]
Výrostková, A., Kroupa, A., Janovec, J., and Svoboda, M., 1998, “Carbide Reactions and Phase Equilibria in Low Alloy Cr–Mo–V Steels Tempered at 773–993 K—Part I: Experimental Measurements,” Acta Mater., 46(1), pp. 31–38. [CrossRef]
Kim, B.-J., Kim, H.-J., and Lim, B.-S., 2008, “Creep-Fatigue Damage and Life Prediction in P92 Alloy by Focused Ultrasound Measurements,” Met. Mater. Int., 14(4), pp. 391–395. [CrossRef]
Jin, S. X., Guo, L. P., Li, T. C., Chen, J. H., Yang, Z., Luo, F. F., Tang, R., Qiao, Y. X., and Liu, F. H., 2012, “Microstructural Evolution of P92 Ferritic/Martensitic Steel Under Ar+ Ion Irradiation at Elevated Temperature,” Mater. Charact., 68, pp. 63–70. [CrossRef]
Xu, H., Yuan, J., Zhu, Z. L., Zhang, Q., and Zhang, N. Q., 2014, “Oxidation Behavior of Ferritic-Martensitic Steel P92 Exposed to Supercritical Water at 600 °C/25 MPa,” J. Chin. Soc. Corros. Prot., 34(2), pp. 119–124. [CrossRef]
Hayakawa, M., Hara, T., Matsuoka, S., and Tsuzaki, K., 2000, “Microstructural Observation of Tempered Martensite in Medium-Carbon Low-Alloy Steel by Atomic Force Microscopy,” J. Jpn. Inst. Met., 64(6), pp. 460–466.
Hayakawa, M., Matsuoka, S., and Tsuzaki, K., 2001, “Observations of Prior Austenite Grain Boundaries and Carbides in the Same Area of Tempered Martensite in Medium-Carbon Steel by Atomic Force Microscopy,” J. Jpn. Inst. Met., 65(8), pp. 734–741.
Banas, J., Stypula, B., Banas, K., Swiatowska-Mrowiecka, J., Starowicz, M., and Lelek-Borkowska, U., 2009, “Corrosion and Passivity of Metals in Methanol Solutions of Electrolytes,” J. Solid State Electrochem., 13(11), pp. 1669–1679. [CrossRef]
Cavalcanti, E., Wanderley, V. G., Miranda, T. R. V., and Uller, L., 1987, “The Effect of Water, Sulphate and pH on the Corrosion Behavior of Carbon Steel in Ethanolic Solutions,” Electrochim. Acta, 32(6), pp. 935–937. [CrossRef]
Lou, X. Y., and Singh, P. M., 2010, “Role of Water, Acetic Acid and Chloride on Corrosion and Pitting Behaviour of Carbon Steel in Fuel-Grade Ethanol,” Corros. Sci., 52(7), pp. 2303–2315. [CrossRef]
Liu, F. G., Du, M., Zhang, J., and Qing, M., 2008, “Inhibition Mechanism of Imidazoline Derivative Inhibitor for Q235 Steel in Saltwater Saturated With CO2,” Acta Phys.-Chim. Sin., 24(1), pp. 138–142.
Wang, B., Du, M., Zhang, J., and Gao, C. J., 2011, “Electrochemical and Surface Analysis Studies on Corrosion Inhibition of Q235 Steel by Imidazoline Derivative Against CO2 Corrosion,” Corros. Sci., 53(1), pp. 353–361. [CrossRef]
Luo, H., Dong, C. F., Li, X. G., and Xiao, K., 2012, “The Electrochemical Behaviour of 2205 Duplex Stainless Steel in Alkaline Solutions With Different pH in the Presence of Chloride,” Electrochim. Acta, 64, pp. 211–220. [CrossRef]
Raistrick, I. D., Franceschetti, D. R., and MacDonald, J. R., 2005, “Theory,” Impedance Spectroscopy: Theory, Experiment, and Application, 2nd ed., E.Barsoukov, and J. R.MacDonald eds., Wiley, Hoboken, NJ, Chap. 2.
Kosec, T., Merl, D. K., and Milošev, I., 2008, “Impedance and XPS Study of Benzotriazole Films Formed on Copper, Copper–Zinc Alloys and Zinc in Chloride Solution,” Corros. Sci., 50(7), pp. 1978–1997. [CrossRef]
Macdonald, D. D., 1992, “Point Defect Model for the Passive State,” J. Electrochem. Soc., 139(12), pp. 3434–3449. [CrossRef]
Kocijan, A., Merl, D. K., and Jenko, M., 2011, “The Corrosion Behavior of Austenitic and Duplex Stainless Steels in Artificial Saliva With the Addition of Fluoride,” Corros. Sci., 53(2), pp. 776–783. [CrossRef]
Wang, B., Zhang, L. W., Su, Y., Xiao, Y., and Liu, J., 2013, “Corrosion Behavior of 5A05 Aluminum Alloy in NaCl Solution,” Acta Metall. Sin., 26(5), pp. 581–587. [CrossRef]
Zheng, S., Li, C., Qi, Y., Chen, L., and Chen, C., 2013, “Mechanism of (Mg,Al,Ca)-Oxide Inclusion-Induced Pitting Corrosion in 316L Stainless Steel Exposed to Sulphur Environments Containing Chloride Ion,” Corros. Sci., 67, pp. 20–31. [CrossRef]
Zhang, C. Y., Chen, X. Q., Chen, D. B., Li, G. M., and Pan, R. Y., 2001, “Research of Pitting Susceptibility in Low Carbon Steels and Mechanism of Pitting Initiation,” J. Chin. Soc. Corros. Prot., 10(5), pp. 265–272. [CrossRef]
Chiba, A., Muto, I., Sugawara, Y., and Hara, N., 2013, “Pit Initiation Mechanism at MnS Inclusions in Stainless Steel: Synergistic Effect of Elemental Sulfur and Chloride Ions,” J. Electrochem. Soc., 160(10), pp. 511–520. [CrossRef]
Shashank Dutt, B., Nani Babu, M., Shanthi, G., Venugopal, S., Sasikala, G., and Bhaduri, A. K., 2012, “Influence of Microstructural Inhomogeneities on the Fracture Toughness of Modified 9Cr-1Mo Steel at 298-823 K,” J. Nucl. Mater., 421(1–3), pp. 15–21. [CrossRef]
Zhang, B. H., 2005, Electrochemical Corrosion and Protection of Metal, Higher Education Press, Beijing, p. 84.
Sikka, V. K., Ward, C. T., and Thomas, K. C., 1983, “Modified 9Cr-1Mo Steel—An Improved Steel for Steam Generator Application,” Ferritic Steels for High Temperature Applications: Proceedings of ASM International Conference on Production, Fabrication, Properties and Application of Ferritic Steels for High Temperature Applications, Warren, PA, 6–8 October 1981, A. K.Khare, ed., ASM, Metals Park, OH, pp. 65–84.

Figures

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Fig. 1

Metallurgical structure and schematic diagram of P92 steel-tempered martensite [8,9]

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Fig. 2

OCP evolution with time under various NaCl concentrations

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Fig. 3

LPR evolution with time under water and different NaCl concentrations

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Fig. 4

The Nyquist plots of P92 steel during 296 hr immersion in water and various NaCl concentrations: (a) distilled water, (b) 1.0% NaCl, and (c) 3.5% NaCl

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Fig. 5

The Bode plots of P92 steel immersed in different NaCl concentrations: (a) 1.0% NaCl and (b) 3.5% NaCl

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Fig. 6

Rp as a function of time. Rp resistance was calculated using Rp = R1 + R2, where R1 and R2 were parameters from the fitting procedure of P92 steel chloride solutions, as indicated.

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Fig. 7

(a) PD for P92 steel before exposure in water and chloride solution and (b) PD after 22 days exposure

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Fig. 8

The breakdown potentials Ebd as a function of NaCl content

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Fig. 9

The macroscopic profile of surface of specimen after 22 days immersion in water and chloride solutions: (a) distilled water, (b) 1.0% NaCl solution, and (c) 3.5% NaCl solution

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Fig. 10

Scanning electron micrographs of P92 steel after 22 days immersion in water and chloride solutions: (a) distilled water; (b) 1.0% NaCl solution; and (c) and (d) 3.5% NaCl solution

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Fig. 11

Metallographic microstructure of P92 steel after 22 days immersion in chloride solutions: (a) and (c) 1.0% NaCl solution and (b) and (d) 3.5% NaCl solution

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