Acta Metall Sin  1989, Vol. 25 Issue (6): 91-95    DOI:

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INTERGRANULAR CORROSION AND PHOSPHOR SEGREGATION AT GRAIN BOUNDARY OF NON-SENSITIZED 00Cr25Ni22Mo2N SUPERPURE AUSTENITIC STAINLESS STEEL

FANG Yaohua;XU Yuan;ZHANG Wenqi Nanjing Institute of Chemical Technology University of Science and Technology Beijing FANG Yaohua; associate professor; Deportment of Applied Chemistry; Nanjing Institute of Chemical Technology; Nanjing 210009

FANG Yaohua;XU Yuan;ZHANG Wenqi Nanjing Institute of Chemical Technology University of Science and Technology Beijing FANG Yaohua; associate professor; Deportment of Applied Chemistry; Nanjing Institute of Chemical Technology; Nanjing 210009. INTERGRANULAR CORROSION AND PHOSPHOR SEGREGATION AT GRAIN BOUNDARY OF NON-SENSITIZED 00Cr25Ni22Mo2N SUPERPURE AUSTENITIC STAINLESS STEEL. Acta Metall Sin, 1989, 25(6): 91-95.

Abstract References Related Articles Recommended Metrics Download:  PDF(1129KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The corrosion behaviour and mechanism of superpure austenitic stain-less steel 00Cr25Ni22Mo2N in urea processing environment was studied. The resultsshow that the gas extraction tube made of non-sensitized 00Cr25Ni22Mo2N steelsuffered intergranular corrosion. Corrosive media penetrated not only into the tubewall through grain boundaries but also expanded from the boundary towards theinterior of the grain. Therefore, funnel shape penetration paths were formed, whichwere wider but less deep than common intergranular corrosion of sensitized stain-less steel. Neither depletion of Cr nor precipitates were found at the grain bound-ary. However, P (and Si) was segregated at grain boundaries to a great extent.Semiquantitative calculation indicates that P content at the grain boundary isabout 25 wt-%, three oders of magnitude higher than the content within the grain.Suggestion is made that the potential difference between the grain and its bound-ary due to the segregation resulted in the observed intergranular corrosion. Key words:  superpure austenitic stainless steel      intergranular corrosion      P(Si) segregation      Received:  18 June 1989      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1989/V25/I6/91 1 Armijo J S. Corrosion, 1968; 24: 24 2 Aust K T. TMS-AIME, 1969; 245; 2117 3 Joshi A, Stein D F. Corrosion, 1972; 28: 321 4 Briant G J. Corrosion, 1980; 36: 508 [1] WANG Zongpu, WANG Weiguo, Rohrer Gregory S, CHEN Song, HONG Lihua, LIN Yan, FENG Xiaozheng, REN Shuai, ZHOU Bangxin. {111}/{111} Near Singular Boundaries in an Al-Zn-Mg-Cu Alloy Recrystallized After Rolling at Different Temperatures[J]. 金属学报, 2023, 59(7): 947-960. [2] ZHENG Chun, LIU Jiabin, JIANG Laizhu, YANG Cheng, JIANG Meixue. Effect of Tensile Deformation on Microstructure and Corrosion Resistance of High Nitrogen Austenitic Stainless Steels[J]. 金属学报, 2022, 58(2): 193-205. [3] Chao CAI,Yang LI,Jinfeng LI,Zhao ZHANG,Jianqing ZHANG. Correlation Between Ageing Precipitation, Potential and Intergranular Corrosion of 2A97 Al-Li Alloy Sheet[J]. 金属学报, 2019, 55(8): 958-966. [4] Shenghu CHEN, Lijian RONG. Microstructure Evolution During Solution Treatment and Its Effects on the Properties of Ni-Fe-Cr Alloy[J]. 金属学报, 2018, 54(3): 385-392. [5] Xiaosong ZHANG,Yong XU,Shihong ZHANG,Ming CHENG,Yonghao ZHAO,Qiaosheng TANG,Yuexia DING. Research on the Collaborative Effect of Plastic Deformation and Solution Treatment in the Intergranular Corrosion Property of Austenite Stainless Steel[J]. 金属学报, 2017, 53(3): 335-344. [6] Xianfeng ZHANG,Guoai LI,Zheng LU,Juan YU,Min HAO. EFFECT OF PREAGED STRETCH AFTER QUENCHED ON THE PROPERTIES AND MICROSTRUCTURE OF A NATURALLY AGED Al-Li ALLOY[J]. 金属学报, 2016, 52(12): 1497-1502. [7] YANG Hui, XIA Shuang, ZHANG Zilong, ZHAO Qing, LIU Tingguang, ZHOU Bangxin, BAI Qin. IMPROVING THE INTERGRANULAR CORROSION RESISTANCE OF THE WELD HEAT-AFFECTED ZONE BY GRAIN BOUNDARY ENGINEERING IN 304 AUSTENITIC STAINLESS STEEL[J]. 金属学报, 2015, 51(3): 333-340. [8] Shaoming QIANG,Laizhu JIANG,Jin LI,Tianwei LIU,Yanping WU,Yiming JIANG. EVALUATION OF INTERGRANULAR CORROSION SUSCEPTIBILITY OF 11Cr FERRITIC STAINLESS STEEL BY DL-EPR METHOD[J]. 金属学报, 2015, 51(11): 1349-1355. [9] LI Hai, MAO Qingzhong, WANG Zhixiu, MIAO Fenfen, FANG Bijun, SONG Renguo, ZHENG Ziqiao. EFFECT OF HIGH TEMPERATURE PRE-AGEING AND LOW-TEMPERATURE RE-AGEING ON MECHANICAL PROPERTIES AND INTERGRANULAR CORROSION SUSCEPTIBILITY OF Al-Mg-Si-Cu ALLOYS[J]. 金属学报, 2014, 50(11): 1357-1366. [10] LI Xiangliang, CHEN Jianghua, LIU Chunhui, FENG Jiani, WANG Shihao. EFFECTS OF T6 AND T78 TEMPERS ON THE MICROSTRUCTURES AND PROPERTIES OF Al－Mg－Si－Cu ALLOYS[J]. 金属学报, 2013, 49(2): 243-250. [11] 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[J]. 金属学报, 2012, 48(12): 1503-1509. [12] LI Hai PAN Daozhao WANG Zhixiu ZHENG Ziqiao. INFLUENCE OF T6I6 TEMPER ON TENSILE AND INTERGRANULAR CORROSION PROPERTIES OF 6061 ALUMINUM ALLOY[J]. 金属学报, 2010, 46(4): 494-499. [13] XIE Jianhui;WU Yinshun; ZHU Rizhang (Universily of Science and Technology Beijing;Beijing 100083). INTERGRANULAR CORROSION BEHAVIOUR OF IMPLANT STAINLESS STEEL DURING CORROSION FATIGUE[J]. 金属学报, 1997, 33(3): 304-308. [14] ZHANG Yun;LIU Yulin;ZHAO Hong'en;HU Zhuangqi Institute of Metal Research; Academia Sinica; Shenyang; ZHU Ziyong; WANG Zhengfu Institute of Corrosion and Protection of Metals; Academia Sinica; Shenyang. INTERGRANULAR AND EXFOLIATION CORROSION BEHAVIOUR OF 8090Al-Li ALLOY[J]. 金属学报, 1991, 27(4): 127-133. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed