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Intergranular corrosion behavior of high nitrogen austenitic stainless steel
Alternative TitleIntergranular corrosion behavior of high nitrogen austenitic stainless steel
Li Huabing; Jiang Zhouhua; Zhang Zurui; Cao Yang; Yang Yan
2009
Source PublicationINTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
ISSN1674-4799
Volume16Issue:6Pages:654-660
AbstractThe intergranular corrosion (IGC) behavior of high nitrogen austenitic stainless steel (HNSS) sensitization treated at 650-950 degrees C was investigated by the double loop electrochemical potentiodynamic reactivation (DL-EPR) method. The effects of the electrolytes, scan rate, sensitizing temperature on the susceptibility to IGC of HNSS were examined. The results show that the addition of NaCl is an effective way to improve the formation of the cracking of a passive film in chromium-depleted zones during the reactivation scan. Decreasing the scan rate exhibits an obvious effect on the breakdown of the passive film. A solution with 2 mol/L H(2)SO(4)+1 mol/L NaCl+0.01 mol/L KSCN is suitable to check the susceptibility to IGC of HNSS at a sensitizing temperature of 650-950 degrees C at a suitable scan rate of 1.667 mV/s. Chromium depletion of HNSS is attributed to the precipitation of Cr(2)N which results in the susceptibility to IGC. The synergistic effect of Mo and N is suggested to play an important role in stabilizing the passive film to prevent the attack of IGC.
Other AbstractThe intergranular corrosion (IGC) behavior of high nitrogen austenitic stainless steel(HNSS) sensitization treated at 650-950℃ was investigated by the double loop electrochemical potentiodynamic reactivation(DL-EPR) method.The effects of the electrolytes,scan rate,sensitizing temperature on the susceptibility to IGC of HNSS were examined. The results show that the addition of NaCl is an effective way to improve the formation of the cracking of a passive film in chromium-depleted zones during the reactivation scan. Decreasing the scan rate exhibits an obvious effect on the breakdown of the passive film. A solution with 2 mol/L H2_SO_4+1 mol/L NaCl+0.01 mol/L KSCN is suitable to check the susceptibility to IGC of HNSS at a sensitizing temperature of 650-950℃ at a suitable scan rate of 1.667 mV/s. Chromium depletion of HNSS is attributed to the precipitation of Cr_2N which results in the susceptibility to IGC. The synergistic effect of Mo and N is suggested to play an important role in stabilizing the passive film to prevent the attack of IGC.
KeywordPOTENTIOKINETIC REACTIVATION TEST AISI 316L STEEL SUSCEPTIBILITY SENSITIZATION ALLOY-600 intergranular corrosion high nitrogen austenitic stainless steel sensitization passive film chromium depletion
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Baosteel Group Corporation]
CSCD IDCSCD:3786406
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/141849
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Li Huabing,Jiang Zhouhua,Zhang Zurui,et al. Intergranular corrosion behavior of high nitrogen austenitic stainless steel[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2009,16(6):654-660.
APA Li Huabing,Jiang Zhouhua,Zhang Zurui,Cao Yang,&Yang Yan.(2009).Intergranular corrosion behavior of high nitrogen austenitic stainless steel.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,16(6),654-660.
MLA Li Huabing,et al."Intergranular corrosion behavior of high nitrogen austenitic stainless steel".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 16.6(2009):654-660.
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