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Acta Metall Sin  2010, Vol. 46 Issue (3): 380-384    DOI: 10.3724/SP.J.1037.2009.00598
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EVALUATION OF THE SUSCEPTIBILITY TO INTERGRANULAR ATTACK OF 2205 DUPLEX STAINLESS STEEL BY DL-EPR METHOD
XU Juliang; DENG Bo; SUN Tao; LI Jin; JIANG Yiming
Department of Material Science; Fudan University; Shanghai 200433
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XU Juliang DENG Bo SUN Tao LI Jin JIANG Yiming. EVALUATION OF THE SUSCEPTIBILITY TO INTERGRANULAR ATTACK OF 2205 DUPLEX STAINLESS STEEL BY DL-EPR METHOD. Acta Metall Sin, 2010, 46(3): 380-384.

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Abstract  

Duplex stainless steels (DSS), consisted of ferrite and austenite, are widely used in oil, chemical, petrochemical, nuclear and marine industries because of their attractive combination of higher mechanical strength and corrosion resistance in various aggressive environments. However, precipitations of detrimental phases, such as chromium carbides, nitrides, intermetallic phases (χσ) inevitably occur when manufacturing conditions and welding procedure heat these duplex stainless steels to temperature ranging from 300 to 1000 ℃, which results in a reduction in corrosion properties due to the presence of chromium-depleted zones around these precipitates. In this paper, the microstructure evolution of 2205 DSS was studied qualitatively at 800 ℃ by using Thermo-Calc coupled with optical microscope. The double-loop electrochemical potentiokinetic reactivation (DL-EPR) was optimized through studying the influences caused by four factors (scan rate, temperature, the concentration of the electrolyte and the surface finish). Then the susceptibility to intergranular attack (IGA) of 2205 DSS was tested by optimized DL-EPR. The results indicated that σ phase will be precipitated in the ferrite phase when 2205 DSS aged at 800 ℃, and the volume fraction would increase with the aging time increasing. The optimized DL-EPR test can evaluate the susceptibility to IGA of 2205 DSS both quantitatively and qualitatively, which is proved by the morphologies of the sample after D--EPR test.

Key words:  2205 duplex stainless steel      DL-EPR      susceptibility to IGA      σ phase     
Received:  09 September 2009     
Fund: 

Supported by National Natural Science Foundation of China (Nos.50871031 and 50701010), Shanghai Science and Technology Development Funds (Nos.09ZR1402600 and 09JC1401600) and Shanghai Leading Academic Discipline Project (No.B113)

URL: 

https://www.ams.org.cn/EN/10.3724/SP.J.1037.2009.00598     OR     https://www.ams.org.cn/EN/Y2010/V46/I3/380

[1] Gao W, Luo J M, Yang J J. Ord Mater Sci Eng, 2005; 28: 61
(高娃, 罗建民, 杨建君. 兵器材料科学与工程, 2005; 28: 61)
[2] Nilsson J O. Mater Sci Technol, 1992; 8: 685
[3] Lopez N, Cid M, Puiggali M. Corros Sci, 1999; 41: 1615
[4] Wilms M E, Gadgil V J, Krougmen J M, Ijsseling F P. Corros Sci, 1994; 36: 871
[5] Strauss B, Schottky H, Hennuber J. Anor Allgem Chem, 1930; 188: 309
[6] Huey W R. Trans Am Soc Steel Treating, 1930; 18: 1126
[7] Streicher M A. Corros Sci, 1969; 9: 53
[8] Cihal V, Desestret A, Froment M, Wagner G H. ´ Etude de Nouveaux Tests Potentiocin´etiques de Corrosion Intergranulaire des Aciers Inoxydables. ´Etude CETIM–Center de Recherches de Firminy, C.A.F.L., 1969: 958
[9] Clarke W L, Romero V M, Danko J C. Corrosion, 1977; 77: 130
[10] Umemura F, Kawamoto T, Gijutsu B. Corr Eng Jpn, 1979; 28: 24
[11] 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)

[12] Scully J R, Kelly R G. Corrosion, 1986; 42: 537
[13] Duret-Thual D, Bonis M, Crolet J L. Mater Corros, 2001; 52: 37
[14] Amadou T, Braham C, Sidhom H. Metall Mater Trans, 2004; 35A: 3499
[15] Garc´?a C, Mart´?n F, Blanco Y, de Tiedra M P, Aparicio M L. Corros Sci, 2009; 51: 76
[16] Deng B, Jiang Y M, Xu J L, Sun T, Gao J,Zhang L H, Zhang W, Li J. Corros Sci, 2009, doi:
10.1016/j.corsci.2009.11.020
[17] 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)

[18] Lee K M, Cho H S, Choi D C. J Alloys Compd, 1999; 285: 156
[19] Majidi A P, Streicher M A. Corrosion, 1984; 40: 393
[20] Sahlaoui H, Makhlouf K, Sidhom H, Philibert J. Mater Sci Eng, 2004; A372: 98

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