T91钢在KCl+Na2SO4+K2SO4熔融盐中的热腐蚀行为研究

doi:10.11902/1005.4537.2016.168

中国腐蚀与防护学报

2017, Vol. 37

Issue (1): 23-28 DOI: 10.11902/1005.4537.2016.168

研究报告

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T91钢在KCl+Na₂SO₄+K₂SO₄熔融盐中的热腐蚀行为研究

刘光明¹(

),刘康生¹,毛晓飞²,万中平²,黄健航¹,于明明³,汪元奎³

1 南昌航空大学材料科学与工程学院南昌 330063
2 国电科学技术研究院武汉 430066
3 东方锅炉股份有限公司材料研究所自贡 643001

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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摘要:

研究了T91钢在600,650和700 ℃10％KCl+10%K₂SO₄+80%Na₂SO₄ (质量分数) 混合熔融盐中的热腐蚀行为。采用XRD,SEM /EDS对腐蚀产物膜相组成和形貌进行了分析。结果表明,T91钢在腐蚀过程中均表现为失重,特别是在650和700 ℃下失重尤为严重。600 ℃下的腐蚀产物膜主要由Fe₃O₄组成;而650和700 ℃下的腐蚀产物膜基本剥落殆尽,EDS分析表明残留的腐蚀产物中S含量较高,这导致腐蚀产物严重剥落。熔盐中Cl可与Cr₂O₃反应生成挥发性的CrO₂Cl₂,导致腐蚀进一步加速。

关键词 ： T91钢, 热腐蚀, KCl+K₂SO₄+Na₂SO₄熔盐

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.

Key words： T91 steel hot corrosion KCl+K₂SO₄+Na₂SO₄ melt

收稿日期: 2016-09-15

基金资助:国家自然科学基金 (51161022),江西省教育厅科技计划 (DB201301133和201301050) 及国电集团科技项目(2016-02)

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引用本文:

刘光明,刘康生,毛晓飞,万中平,黄健航,于明明,汪元奎. T91钢在KCl+Na₂SO₄+K₂SO₄熔融盐中的热腐蚀行为研究[J]. 中国腐蚀与防护学报, 2017, 37(1): 23-28.
Guangming LIU, Kangsheng LIU, Xiaofei MAO, Zhongping WAN, Jianhang HUANG, Mingming YU, Yuankui WANG. Hot Corrosion of T91 Steel in Molten Mixture of KCl+Na₂SO₄+K₂SO₄. Journal of Chinese Society for Corrosion and protection, 2017, 37(1): 23-28.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.168 或 https://www.jcscp.org/CN/Y2017/V37/I1/23

图1 T91钢在600,650和700 ℃下混合熔盐中的热腐蚀动力学曲线

图2 T91钢在600,650和700 ℃下热腐蚀后表面产物的XRD谱

图3 T91钢在不同温度下热腐蚀后的表面形貌和EDS分析结果

图4 T91钢在700 ℃下热腐蚀6 h后截面形貌及EDS分析结果

[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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