Acta Metall Sin  2012, Vol. 48 Issue (4): 502-507    DOI: 10.3724/SP.J.1037.2011.00489

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INFLUENCE OF TEMPERATURE ON PITTING CORROSION RESISTANCE OF Cr26Mo1 ULTRA PURE HIGH CHROMIUM FERRITE STAINLESS STEEL IN 3.5%NaCl SOLUTION

WEI Xin1,2, DONG Junhua1, TONG Jian1, ZHENG Zhi1,KE Wei1

1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 2. College of Materials Science and Engineering, Dalian University ofTechnology, Dalian 116024

WEI Xin, DONG Junhua, TONG Jian, ZHENG Zhi,KE Wei. INFLUENCE OF TEMPERATURE ON PITTING CORROSION RESISTANCE OF Cr26Mo1 ULTRA PURE HIGH CHROMIUM FERRITE STAINLESS STEEL IN 3.5%NaCl SOLUTION. Acta Metall Sin, 2012, 48(4): 502-507.

Abstract References Related Articles Recommended Metrics Download:  PDF(665KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The remarkable uniform corrosion resistance of ultra pure high chromium ferrite stainless steel in various rigorous corrosive environments is based on the formation of a passive film on its surface. However, it is suspected that this stainless steel was easy to suffer from pitting corrosion. In this work, the influences of temperature on the pitting corrosion resistance of Cr26Mo1 ultra pure high chromium ferrite stainless steel were studied by electrochemical methods such as cyclic polarization curves, Mott-Schottky curves and electrochemical impedance spectroscopy in 3.5%NaCl solution. The results showed that with the increase of the temperature, open-circuit corrosion potential and pitting corrosion potential decreased, corrosion current density increased, the impedance of passive film decreased. The semi-conductive styles and properties of passive film changed at different temperatures. Also, the pregnancy time of pitting shortened and the sensitivity of pitting increased remarkably as the temperature increased. In addition, the cyclic polarization curves indicated that the repassivation of existing pits was more difficult when the potential was swept toward the negative direction. Key words:  ultra pure high chromium ferrite stainless steel      passive film      cyclic polarization      pitting corrosion      Received:  27 July 2011      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors DONG Jun-Hua WEI Xin TONG Jian ZHENG Zhi KE Wei URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00489     OR     https://www.ams.org.cn/EN/Y2012/V48/I4/502 [1] Ilevbare G O, Burstein G T.  Corros Sci, 2003; 45: 1545 [2] Sekine I, Okano C, Yuasa M.  Corros Sci, 1990; 30: 351 [3] Hiraide N.  World Iron Steel, 2004; 6: 33 [4] You X M, Jiang Z H, Li H B, Shen M H, Cao Y.  China Metall,2006; 16(11): 16     (游香米, 姜周华, 李花兵, 申明辉, 曹阳. 中国冶金, 2006; 16(11): 16 ) [5] Latanision R M, Kloppers M J, Bellucci F.  Corrosion, 1992; 48: 229 [6] Kaneko M, Isaaca H S.  Corros Sci, 2002; 44: 1825 [7] Shan Y T, Luo X H, Hu X Q, Liu S.  J Mater Sci Technol, 2011; 27: 352 [8] Ernst P, Newman R C.  Corros Sci, 2007; 49: 3705 [9] Rosenfeld I L, Danilov I S, Oranskaya R N.  J Electrochem Soc,1978; 125: 1728 [10] Stockert L, Hunkeler F, Bohni H.  Corrosion, 1985; 41: 676 [11] Carmezim M J, Simoes A M, Montemor M F, Da C B M.  Corros Sci,2005; 47: 581 [12] Ferreira M G S, Hakiki N E, Goodlet G, Faty S, Simoes A M P, Da C B M. 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