Relationship Between Microstructure and Corrosion Behavior of Cr12Ni3Co12Mo4W Ultra-High-Strength Martensitic Stainless Steel

doi:10.1007/s40195-016-0481-3

Abstract

Abstract:

The effect of tempering temperature on the microstructure and corrosion behavior of Cr12Ni3Co12Mo4W ultra-high-strength martensitic stainless steel was investigated using transmission electron microscopy, atomic force microscopy, X-ray diffraction, and electrochemical tests. The microstructures of the ultra-high-strength martensitic stainless steel consisted of some retained austenite and lath/plant martensite with the carbides distributed within the matrix and at the grain boundaries. Tempering of the steel for 4 h at various temperatures resulted in various carbide grain sizes and different amounts of the retained austenite. The results showed that larger carbide grains led to diminished corrosion resistance, whereas larger amounts of the retained austenite resulted in improved corrosion resistance. The steels exhibited good corrosion resistance in 0.017 mol/L NaCl solution and exhibited pitting corrosion in 0.17 mol/L NaCl solution. The martensite and prior austenite crystal boundaries dissolved in solution with pH 1.

Key words: Heat treatment, Martensite, Retained austenite, Carbide, Corrosion behavior

Hui-Yan Li,Chao-Fang Dong,Kui Xiao,Xiao-Gang Li,Ping Zhong. Relationship Between Microstructure and Corrosion Behavior of Cr12Ni3Co12Mo4W Ultra-High-Strength Martensitic Stainless Steel[J]. Acta Metallurgica Sinica (English Letters), 2016, 29(11): 1064-1072.

Figures/Tables 12

Fig. 1 Schematic of heat treatment process on the Cr12Ni3Co12Mo4W UHSMSS

Fig. 2 Microstructures of the Cr12Ni3Co12Mo4W UHSMSS samples subjected to various heat treatments of a 400 °C, b 520 °C, c 600 °C

Fig. 3 TEM micrographs of the Cr12Ni3Co12Mo4W UHSMSS subjected to various tempered temperatures a 400 °C, b 520 °C, c 600 °C, d corresponding electron diffraction pattern from the carbide in b

Fig. 4 3D AFM height (a) and potential (b) morphologies of the etched surface of the Cr12Ni3Co12Mo4W UHSMSS tempered at 600 °C

Fig. 5 Potentiodynamic polarization curves for the UHSMSS in 0.1 mol/L Na2SO4 + 0.017 mol/L NaCl (pH 3) solution

Fig. 6 Potentiodynamic polarization curves for the UHSMSS in 0.1 mol/L Na2SO4 + 0.17 mol/L NaCl (pH 3) solution

Fig. 7 Curves of pitting potential versus carbide grain size and amount of the retained austenite

Fig. 8 EIS results of the UHSMSS in 0.1 mol/L Na2SO4 + 0.17 mol/L NaCl (pH 3) solution

Fig. 9 Surface morphologies of the UHSMSS tempered at 400 °C (a, c, d) and 600 °C (b) after immersion for 10 min (a, b) and potentiodynamic polarization test (c, d) in 0.1 mol/L Na2SO4 + 0.17 mol/L NaCl (pH 1) solution

References

[1]	H. Krawiec, V. Vignal, O. Heintz, R. Oltra, E. Finot, J.M. Olive, Metall. Mater. Trans. A 35A, 3515 (2004)
[2]	S. Marcelin, N. Pebere, S. Regnier, Electrochim. Acta 87, 32 (2013)
[3]	A. Bojack, L. Zhao, P.F. Morris, J. Sietsma, Mater. Charact. 71, 77(2012)
[4]	C.X. Li, T. Bell, Corros. Sci,. 48 2036 (2006)
[5]	S.K. Kim, J.S. Yoo, J.M. Priest, M.P. Fewell, Surf. Coat.Technol . 163-164, 380(2003)
[6]	M. Sun, K. Xiao, C.F. Dong, X.G. Li, P. Zhong, Corros. Sci. 89, 137(2014)
[7]	M. Sun, K. Xiao, C.F. Dong, X.G. Li, P. Zhong, Metall. Mater. Trans. A 44A, 4709 (2013)
[8]	Z.Y. Zhang, Z.Y. Wang, Y.M. Jiang, H. Tan, D. Han, Y.J. Guo, J. Li, Corros. Sci. 62, 42(2012)
[9]	R.C. Fan, M. Gao, Y.C. Ma, X.D. Zha, X.C. Hao, K. Liu, J. Mater. Sci. Technol. 28, 1059(2012)
[10]	A. Pfennig, P. Zastrow, A. Kranzmann, Int. J. Greenh. Gas Control 15, 213 (2013)
[11]	Y.Y. Song, X.Y. Li, L.J. Rong, D.H. Ping, F.X. Yin, Y.Y. Li, A 528, 4075 (2011)
[12]	O.V. Akgun, M. Urgen, A.F. Cakir, A 203, 324 (1995)
[13]	A.N. Isfahany, H. Saghafian, G. Borhani, J. Alloys. Compd. 509, 3931(2011)
[14]	S.M. Alvarez, A. Bautista, F. Velasco, Corros. Sci. 69, 130(2013)
[15]	J.Y. Park, Y.S. Park, Mater. Sci. Eng., A 449-451, 1131(2007)
[16]	C.A. Gervasi, C.M. Mendez, P.D. Bilmes, C.L. Llorente, Mater. Chem. Phys. 126, 178(2011)
[17]	K.M. Kim, J.H. Park, J.H. Kim, K.Y. Kim, Int. J. Hydrogen Energ. 36, 9926(2011)
[18]	C. Garcia, F. Martin, Y. Blanco, M.L. Aparicio, Corros. Sci. 52, 3725(2010)
[19]	C.L. Hu, S. Xia, H. Li, T.G. Liu, B.X. Zhou, W.J. Chen, N. Wang, Corros. Sci. 53, 1880(2011)
[20]	S.X. Li, Y.N. He, S.R. Yu, P.Y. Zhang, Corros. Sci. 66, 211(2013)
[21]	Y.S. Choi, J.G. Kim, Y.S. Park, J.Y. Park, Mater. Lett. 61, 244(2007)
[22]	P.D. Bilmes, C.L. Llorente, C.M. Méndez, C.A. Gervasi, Corros. Sci. 51, 876(2009)
[23]	Y.H. Yang, B. Yan, J. Li, J. Wang, Corros. Sci. 53, 3756(2011)
[24]	L.D. Chen, H. Tan, Z.Y. Wang, J. Li, Y.M. Jiang, Corros. Sci. 58, 168(2012)
[25]	Y.Z. Yang, Z.Y. Wang, H. Tan, J.F. Hong, Y.M. Jiang, L.Z. Jiang, J. Li, Corros. Sci. 65, 472(2012)
[26]	S. Kuimalee, T. CHairuangsri, J. Pearce, D. Edmonds, A. Brown, R. Brydson. Micron 41, 423 (2010)
[27]	C.G. Andres, G. Caruana, L.F. Alvarez, Mater. Sci. Eng.,A 241, 211 (1998)
[28]	Y.B. Hu, C.F. Dong, M. Sun, K. Xiao, P. Zhong, X.G. Li, Corros. Sci. 53, 4159(2011)
[29]	P.D. Bilmes, C.L. Llorente, L. Huaman, L.M. Gassa, C.A. Gervasi, Corros. Sci. 48, 3261(2006)
[30]	S.T. Kim, S.H. Jang, I.S. Lee, Y.S. Park, Corros. Sci. 53, 1939 (2011)