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| Hot Corrosion of T91 Steel in Molten Mixture of KCl+Na2SO4+K2SO4 |
Guangming LIU1( ),Kangsheng LIU1,Xiaofei MAO2,Zhongping WAN2,Jianhang HUANG1,Mingming YU3,Yuankui WANG3 |
1 School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
2 Guodian Science and Technology Research Institute, Wuhan 430066, China
3 Material Research Institute, Dongfang Boiler Group Co., Ltd., Zigong 643001, China |
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Abstract The hot corrosion behavior of T91 steel in molten salts of 10%KCl+10%K2SO4+80%Na2SO4was studied at 600, 650 and 700 ℃ respectively. The microstructure and composition of the corrosion products were characterized by scanning electron microscope/energy dispersive spectroscope (SEM/EDS) and X-ray diffraction (XRD). Mass loss was observed at various temperatures during the tests, especially disastrous mass loss occurred at 650 and 700 ℃. The main corrosion product was identified as Fe3O4 after corrosion at 600 ℃. However, the corrosion products spalled off seriously during the hot corrosion at 650 and 700 ℃. The residual corrosion products were rich in S, which was the main reason for serious spallation of the corrosion products. Cl existed in the molten salts could react with Cr2O3 to form volatile CrO2Cl2, which accelerated the hot corrosion process.
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Received: 15 September 2016
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| Fund: Supported by National Science Fundation of China (51161022), Science and Technology Foundation of Department of Education of Jiangxi Province (DB201301133 and 201301050) and Guodian Science and Technology Project (2016-02) |
| [1] | Yang Y P, Yang Z P, Xu G, et al.Situation and prospect of energy consumption for China's thermal power generation[J]. Proc. CSEE, 2013, 33(23): 1 | | [1] | (杨勇平, 杨志平, 徐钢等. 中国火力发电能耗状况及展望[J]. 中国电机工程学报, 2013, 33(23): 1) | | [2] | Duan P, He S F, Liu Y Z, et al.Investigation on aging properties of P91 steel in ultra-supercritical power units[J]. Boiler Technol., 2015, 46(Z2): 19 | | [2] | (段鹏, 何淑芬, 刘宇哲等. 超(超) 临界机组用P91钢老化性能研究[J]. 锅炉技术, 2015, 46(Z2): 19) | | [3] | Yue Z W, Fu M, Li X G, et al.Effect of grain size on water vapor oxidation resistance of P91 steel[J]. Corros. Sci. Prot. Technol., 2008, 20: 162 | | [3] | (岳增武, 傅敏, 李辛庚等. 晶粒度对P91钢水蒸气氧化性能的影响[J]. 腐蚀科学与防护技术, 2008, 20: 162) | | [4] | Liu G M, Wang C F, Yu F, et al.Evolution of oxide film of T91 steel in water vapor atmosphere at 750 ℃[J]. Oxid. Met., 2014, 81: 383 | | [5] | Liu G M, Zhang D Q, Ren S P.Effect of nano-Y2O3 pretreatment on oxidation resistance of T91 steel in high-temperature water vapor environment[J]. Surf. Technol., 2015, 44(12): 104 | | [5] | (刘光明, 张都清, 任善平. 纳米Y2O3预处理对T91钢抗高温水蒸汽氧化的影响[J]. 表面技术, 2015, 44(12): 104) | | [6] | Gurr M, Bau S, Burmeister F, et al.Investigation of the corrosion behavior of NiVAl multilayer coatings in hot salt melts[J]. Surf. Coat. Technol., 2015, 279: 101 | | [7] | Kalvala P R, Akram J, Misra M, et al.Low temperature friction stir welding of P91 steel[J]. Defence Technol., 2016, 12: 285 | | [8] | Yang H C, Tu Y.Experimental investigation on special performance of P91 steel pipe[J]. Pressure Vessels Technol., 2004, 21(3): 1 | | [8] | (杨华春, 屠勇. P91钢管特殊性能试验研究[J]. 压力容器, 2004, 21(3): 1) | | [9] | Shibli A, Starr F.Some aspects of plant and research experience in the use of new high strength martensitic steel P91[J]. Int. J. Pressure Vessels Pip., 2007, 84: 114 | | [10] | Miao X L, Wang Y K, Liu G M, et al.Hot corrosion behavior of subersonic sprayed NiCr/Cr3C2 coating on P91 steel[J]. Surf. Technol., 2011, 40(5): 25 | | [10] | (缪筱玲, 汪元奎, 刘光明等. P91钢亚音速喷涂NiCr/Cr3C2涂层的热腐蚀行为研究[J]. 表面技术, 2011, 40(5): 25) | | [11] | Fu G Y, Li J G, Liu Q, et al.Effect of Y2O3 on hot corrosion behavior of mechanical alloying Fe-20Cr-2.5Al alloy[J]. Chin. Rare Earths, 2015, 36(3): 72 | | [11] | (付广艳, 李剑光, 刘群等. Y2O3对机械合金化Fe-20Cr-2.5Al合金热腐蚀行为的影响[J]. 稀土, 2015, 36(3): 72) | | [12] | Bao Q H, Ye B, Jiang H Y, et al.Research progress on the corrosion resistance of Nickel-based superalloy[J]. Mater. Rev., 2015, 29(17): 128 | | [12] | (鲍庆煌, 叶兵, 蒋海燕等. 镍基高温合金耐腐蚀性能的研究进展[J]. 材料导报, 2015, 29(17): 128) | | [13] | Lu X D, Tian S G, Chen T, et al.Internal oxidation and internal sulfuration of Ni-Base alloy with high Cr content during hot corrosion in molten sulfate[J]. Rare Met. Mater. Eng., 2014, (1): 79 | | [13] | (卢旭东, 田素贵, 陈涛等. 高铬镍基合金熔融硫酸盐热腐蚀过程中内氧化和内硫化行为的研究[J]. 稀有金属材料与工程, 2014, (1): 79) | | [14] | Wu Y S, Wang D, Zeng D C.Hot corrosion behavior of the nanostructured NiCrBSi-TiB2 coating in molten sulfate salt[J]. Surf. Technol., 2015, 44(4): 113 | | [14] | (吴姚莎, 王迪, 曾德长. 纳米NiCrBSi-TiB2涂层在硫酸熔盐中的热腐蚀行为研究[J]. 表面技术, 2015, 44(4): 113) | | [15] | Guan X R, Guan Y S, Ji H S, et al.Effect of different Cr content on hot corrosion resistance of Ni-base superalloy[J]. Trans. Mater. Heat Treat., 2014, 35(S1): 58 | | [15] | (管秀荣, 关英双, 纪慧思等. 不同Cr含量对镍基高温合金抗热腐蚀性能的影响[J]. 材料热处理学报, 2014, 35(S1): 58) | | [16] | Fu G Y, Lin L H, Liu Q, et al.Hot corrosion behavior of Fe-Cr alloys with Na2SO4 coating[J]. J. Shenyang Univ. Chem. Technol., 2014, 28: 69 | | [16] | (付广艳, 林立海, 刘群等. Fe-Cr合金在Na2SO4盐膜下的热腐蚀行为[J]. 沈阳化工大学学报, 2014, 28: 69) | | [17] | Guo G F.The corrosion and mechanism of Fe, Cr, Ni and their oxide in NaCl, KCl molten salt [D]. Dalian: Dalian University of Technology, 2005 | | [17] | (郭贵芬. Fe、Cr、Ni及其氧化物在NaCl、KCl熔盐中的腐蚀及机理 [D]. 大连: 大连理工大学, 2005) |
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