|
|
THE INFLUENCE OF SENSITIVE TEMPERATURE ON THE LOCALIZED CORROSION RESISTANCE OF DUPLEX STAINLESS STEEL SAF2304 |
GUO Lifang 1, LI Xuyan 1, SUN Tao 1, XU Juliang 1, LI Jin 1,2, JIANG Yiming 1 |
1. Department of Materials Science, Fudan University, Shanghai 200433
2. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
|
Cite this article:
GUO Lifang LI Xuyan SUN Tao XU Juliang LI Jin JIANG Yiming . THE INFLUENCE OF SENSITIVE TEMPERATURE ON THE LOCALIZED CORROSION RESISTANCE OF DUPLEX STAINLESS STEEL SAF2304. Acta Metall Sin, 2012, 48(12): 1503-1509.
|
Abstract Duplex stainless steels (DSS), characterized by a two–phase microstructure of ferrite (α) and austenite (γ), have an attractive combination of mechanical strength and corrosion resistance in various aggressive environment. DSS SAF2304 shows wide application potential due to its lower cost compared with conventional DSS and better corrosion performance than austenite steel. However, precipitations of detrimental phases inevitably occur when DSS is heated to temperatures ranging from 300 ℃ to 1000 ℃ during manufacturing and welding procedures. These precipitations will lead to the reduction of corrosion resistance of DSS due to the presence of chromium–depleted zones around them. This work investigates the influence of sensitive temperature on the localized corrosion resistance of DSS SAF2304. The resistances to intergranular corrosion and pitting corrosion of DSS SAF2304 annealed at various temperatures ranging from 600 ℃ to 950 ℃ for 2 h were investigated by means of double loop electrochemical potentiodynamic reactivation (DL–EPR) technique in a solution of 1 mol/L H2SO4+1 mol/L HCl+0.2 mol/L NaCl at 30 ℃ with a scanning rate of 1.667 mV/s and critical pitting corrosion temperature (CPT) technique in a solution of 1 mol/L NaCl with a rising rate of 1 ℃/min, respectively. The morphologies and microstructures of the specimens after electrolytic etching in 30%KOH, oxalic acid and potassium metabisulfite were characterized by OM and SEM techniques. A same trend was observed by the different evaluating techniques, which suggested that both of the resistances of intergranular corrosion and pitting corrosion of DSS SAF2304 decreased with the annealing temperature increased from 600 ℃ to 700 ℃, while a contrary trend was found from 750 ℃ to 950 ℃. In particular, the samples annealed at 700 and 750 ℃ suffered the severest corrosion. The relationship between microstructure and localized corrosion resistance was revealed by the evolution of the microstructure, and it was found that the deterioration of the resistance to localized corrosion was due to the formation of chromium–depleted zones around the precipitation of Cr2N.
|
Received: 28 June 2012
|
|
Fund: Supported by National Natural Science Foundation of China (Nos.51071049, 51134010 and 51131008) |
[1] Solomon H D, Devine T M. In: Lula R A ed., Proc Conf on Duplex Stainless Steels, Metals Park, Ohio: American Society for Metals, 1983: 693[2] Olsson J O, Groth H L. Desalination, 1994; 97: 67[3] Olsson J, Snis M. Desalination, 2007; 205: 104[4] Zhang Z Y, Han D, Jiang Y M, Shi C, Li J. Nucl Eng Des, 2012; 243: 56[5] Straffelini G, Baldo S, Calliari I. Metall Mater Trans, 2009; 40A: 2616[6] Garzon C M, Ramirez A J. Acta Mater, 2006; 54: 3321[7] Kobayashi D Y, Wolynec S. Mater Res, 1999; 2: 239[8] Duprez L, De Cooman B, Akdut N. Steel Res, 2000; 71: 417[9] Chen T H, Weng K L, Yang J R. Mater Sci Eng, 2002; A338: 259[10] Wilms M E, Gadgil V J, Krougman J M, Ijsseling F P. Corros Sci, 1994; 36: 871[11] Lopez N, Cid M, Puiggali M. Corros Sci, 1999; 41: 1615[12] Nilsson J O. Mater Sci Technol, 1992; 8: 685[13] King A, Johnson G, Engelberg D. Science, 2008; 321: 382[14] Bohni H. Langmuir, 1987; 3: 924[15] Bastos I N, Tavares S S, Dalard F, Nogueira R P. Scr Mater, 2007; 57: 913[16] Buhler H E, Gerlach L, Greven O, Bleck W. Corros Sci, 2003; 45: 2325[17] Lopez N, Cid M, Puiggali M, Azkarate I, Pelayo A. Mater Sci Eng, 1997; A229: 123[18] Jin W S, Lang Y P, Rong F, Sun L J. J Chin Soc Corros Prot, 2007; 27: 54(金维松, 郎宇平, 荣凡, 孙力军. 中国腐蚀与防护学报, 2007; 27: 54)[19] Deng B, Jiang Y M, Gong J, Zhong C, Gao J, Li J. Electrochim Acta, 2008; 53: 5220[20] Ovarfort R. Corros Sci, 1989; 29: 987[21] Brigham R J, Tozer E W. Corrosion, 1973; 29: 33[22] Moayed M H, Newman R C. Corros Sci, 2006; 48: 1004[23] Garfias–Mesias L F, Sykes J M. Corros Sci, 1999; 41: 959[24] Li S S. Corros Sci Technol Prot, 2000; 12: 288(李神速. 腐蚀科学与防护技术, 2000; 12: 288)[25] Schwind M, Kallqvist J, Nilsson J O. Acta Mater, 2000; 48: 2473[26] Fargas G, Anglada M, Mateo A. J Mater Process Technol, 2009; 209: 1770[27] Gao J, Jiang Y, Deng B, Ge Z, Li J. Electrochim Acta, 2010; 55: 4837[28] Ebrahimi N, Momeni M, Moayed M H, Davoodi A. Corros Sci, 2011; 53: 637[29] Deng B, Jiang Y, Xu J, Sun T, Gao J, Zhang L, Zhang W, Li J. Corros Sci, 2010; 52: 969 |
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|