Effect of Al on microstructure and weathering resistance of 4Cr1.5Ni weathering steel
WANG Jin-jian1,2, CHEN Run-nong2, HU Hui-chao3, LIU Jing1, CAO Yan-guang2, LI Zhao-dong2
1. The key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; 2. Institute of Structural Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China; 3. Electromechanical and Material Engineering College, Harbin Huade University, Harbin 150500, Heilongjiang, China
Abstract：Weathering steel has good atmospheric corrosion resistance, but traditional weathering steel cannot be used in high-humidity and hot marine atmospheric environment, relevant reports pointed out that it has accelerated corrosion after 8 years of exposure to the sun in Wanning. To meet the needs of marine engineering development, it is particularly important to optimize traditional weathering steel or develop new weathering steel. Two new weathering steels, 4Cr1.5Ni and 4Cr1.5Ni0.8Al, were designed based on traditional low-carbon steel composition and considering laterite nickel ore resources. The indoor accelerated dry-wet cyclic corrosion test was used to simulate the high humidity and heat Marine atmosphere environment. The microstructure and weatherability of the new weather-resistant steel were studied by combining OM, SEM, EDS, XRD, XPS and electrochemical methods. The effects of aluminum addition on microstructure, morphology of initial corrosion rust layer, phase composition and protection ability of test steel were analyzed emphatically. The relevant results can provide a reference for the development of new weathering steel suitable for the high-humidity and heat marine atmospheric environment. The results show that the microstructure of 4Cr1.5Ni steel is ferrite and martensite, and that of 4Cr1.5Ni0.8Al steel is ferrite and a little pearlite. The addition of aluminum can promote the formation of ferrite. The addition of aluminum reduces the corrosion rate, rust layer thickness and corrosion current density of 4Cr1.5Ni steel, and increases the corrosion potential and rust layer resistance. The α/γ(α-FeOOH/γ-FeOOH) value of 4Cr1.5Ni0.8Al steel is 2.5 times that of 4Cr1.5Ni steel, and the protection ability of the rust layer is enhanced. The presence of aluminum in the rust layer in the form of +3 valence (AlOOH and Al (OH)3), and at the same time promotes the formation of FeCr2O4 which is thermodynamically more stable in the initial rust layer. In particular, the distribution area of aluminum and chromium in the rust layer of 4Cr1.5Ni0.8Al steel is the same, that is, there is a synchronous enrichment phenomenon, indicating that there is a synergistic effect of aluminum and chromium.
王进建, 陈润农, 胡惠超, 刘静, 曹燕光, 李昭东. 铝对4Cr1.5Ni耐候钢组织和耐候性的影响[J]. 钢铁, 2023, 58(2): 126-136.
WANG Jin-jian, CHEN Run-nong, HU Hui-chao, LIU Jing, CAO Yan-guang, LI Zhao-dong. Effect of Al on microstructure and weathering resistance of 4Cr1.5Ni weathering steel[J]. Iron and Steel, 2023, 58(2): 126-136.
[1] LI X, ZHANG D, LIU Z, et al. Materials science: Share corrosion data[J]. Nature, 2015, 527(7579): 441. [2] Oh S J, Cook D C, Townsend H E. Atmospheric corrosion of different steels in marine, rural and industrial environments [J]. Corrosion Science,1999, 41(9): 1687. [3] 林鹏飞, 杨忠民, 陈颖,等. 耐候钢锈层及其稳定化处理现状[J]. 钢铁, 2021, 56(3):8. (LIN Peng-fei, YANG Zhong-min,CHEN Ying, et al. Rust layer of weathering steel and its stabilization treatment status[J]. Iron and Steel, 2021, 56(3):8.) [4] 梁彩凤, 侯文泰. 碳钢,低合金钢16年大气暴露腐蚀研究[J]. 中国腐蚀与防护学报, 2005, 25(1):6.(LIANG Cai-feng, HOU Wen-tai. Sixteen-year atmospheric corrosion exposure study of steels [J]. Journal of Chinese Society for Corrosion and Protection, 2005,25(1):6.) [5] 周乃鹏,佘昌莲,柴锋,等.高湿热海洋环境低合金结构钢腐蚀研究进展[J].钢铁,2022,57(7):137.(ZHOU Nai-peng, SHE Chang-lian, CHAI Feng,et al. Advances in corrosion research of low alloy steel in highhumidity and high temperature marine environment[J].Iron and Steel, 2022, 57(7):137.) [6] 周鲁军,杨善武.海洋工程用钢的大气腐蚀与耐候钢的发展[J].中国冶金,2022, 32(8):18.(ZHOU Lu-jun, YANG Shan-wu. Atmospheric corrosion of steels for marine engineering and development of weathering steels[J]. China Metallurgy,2022, 32(8):18.) [7] LIU W, LIU J, PAN H, et al. Synergisic effect of Mn, Cu, P with Cr content on the corrosion behavior of weathering steel as a train under the simulated industrial atmosphere[J]. Journal of Alloys and Compounds, 2020, 834:155095. [8] Kamimura T, Stratmann M. The influence of chromium on the atmospheric corrosion of steel[J]. Corrosion Science, 2001, 43(3): 429. [9] SUN M, DU C, LIU Z, et al. Fundamental understanding on the effect of Cr on corrosion resistance of weathering steel in simulated tropical marine atmosphere[J].Corrosion Science, 2021,186:109427. [10] ZHANG Q C, ZHENG W L. Characterization of rust layer formed on low alloy steel exposed in marine atmosphere [J]. Journal of Materials Science and Technology, 2002, 18(5): 455 [11] Diaz I, Cano H, Fuente D, et al. Atmospheric corrosion of Ni-advanced weathering steels in marine atmospheres of moderate salinity[J]. Corrosion Science, 2013, 76(2):348. [12] 刘芮, 陈小平, 王向东,等. Ni对耐候钢在模拟海洋大气环境下耐蚀性的影响[J]. 腐蚀科学与防护技术, 2016, 28(2):7.(LIU Rui, CHEN Xiao-ping, WANG Xiang-dong,et al. Effect of nickel on corrosion resistance of weathering steels in a simulated marine atmosphere environment[J]. Corrosion Science and Protection Technology, 2016, 28(2):7.) [13] CHENG X Q, TIAN Y W, LI X G, et al. Corrosion behavior of nickel-containing weathering steel in simulated marine atmospheric environment[J].Materials and Corrosion, 2014, 65(10): 1033. [14] Kimura M, Kihira H, Ohta N, et al. Control of Fe (O, OH)6 nano-network structures of rust for high atmospheric-corrosion resistance[J]. Corrosion Science, 2005, 47(10):2499. [15] WU W, ZENG Z, CHENG X, et al. Atmospheric corrosion behavior and mechanism of a Ni-advanced weathering steel in simulated tropical marine environment[J].Journal of Materials Engineering and Performance, 2017, 26(12): 6075. [16] XU X, ZHANG T, WU W, et al. Optimizing the resistance of Ni-advanced weathering steel to marine atmospheric corrosion with the addition of Al or Mo[J]. Construction and Building Materials, 2021, 279: 122341. [17] Nishimura T. Rust formation and corrosion performance of Si-and Al-bearing ultrafine grained weathering steel[J]. Corrosion Science, 2008, 50(5): 1306. [18] 李东亮, 付贵勤, 朱苗勇. 湿热工业-海洋大气中铝对桥梁钢耐蚀性的影响[J]. 腐蚀与防护, 2016, 37(10): 781.(LI Dong-liang,FU Gui-qin,ZHU Miao-yong. Effect of Al on corrosion resistance of bridge steel in humid and warm industrial-marine atmosphere[J].Corrosion and Protection, 2016, 37(10): 781.) [19] Denier P, Cornet A. Corrosion of steels in potable groundwater Part II-Experimental analysis[J]. Materials and Corrosion, 1997, 48(7): 429. [20] 徐海健, 沙孝春, 孟劲松, 等. Al元素对耐候桥梁钢微观组织及力学性能的影响[J].上海金属, 2019, 41(4): 45.(XU Hai-jian,SHA Xiao-chun, MENG Jin-song, et al. Effect of Al element on microstructure and mechanical properties of weather-proof bridge steel[J]. Shanghai Metals, 2019, 41(4): 45.) [21] Liu C, Revilla R I, Zhang D, et al. Role of Al2O3 inclusions on the localized corrosion of Q460 NH weathering steel in marine environment[J]. Corrosion Science, 2018, 138: 96. [22] Thee C, Hao L, Dong J, et al. Atmospheric corrosion monitoring of a weathering steel under an electrolyte film in cyclic wet-dry condition[J]. Corrosion Science, 2014, 78: 130. [23] 李辉, 李烁, 史春丽,等. 超低碳低活化铁素体/马氏体钢的低温韧性[J].金属热处理,2018, 43(1):6.(LI Hui, LI Shuo, SHI Chun-li, et al. Low-temperature toughness of ultra-low carborn reduced activated ferritic/martensitic steel [J]. Heat Treatment of Metals, 2018, 43(1):6.) [24] 张飘飘, 杨忠民, 陈颖, 等. 含铬耐候钢在模拟海洋大气环境中的腐蚀行为[J].中国腐蚀与防护学报, 2017, 37(2):8.(ZHANG Piao-piao, YANG Zhong-min, CHEN Ying, et al. Corrosion behavior of cr bearing weathering steel in simulated marine atmosphere[J]. Journal of Chinese Society for Corrosion and Protection, 2017, 37(2):8.) [25] ZHANG T, LIU W, YIN Z, et al. Effects of the addition of Cu and Ni on the corrosion behavior of weathering steels in corrosive industrial environments[J]. Journal of Materials Engineering and Performance, 2020, 29(4): 2531. [26] 高立军, 杨建炜, 张侠洲,等. 耐火耐候钢在工业和海洋大气环境中的腐蚀行为研究[J]. 上海金属, 2019,41(3):4.(GAO Li-jun,YANG Jian-wei,ZHANG Xia-zhou,et al.Corrosion behavior of refractory weatherproof steel in industrial and marine atmosphere environments[J]. Shanghai Metals, 2019, 41(3):4.) [27] MA Y, LI Y, WANG F. Corrosion of low carbon steel in atmospheric environments of different chloride content[J]. Corrosion Science, 2009, 51(5): 997. [28] JIA J, WU W, CHENG X, et al. Ni-advanced weathering steels in Maldives for two years: Corrosion results of tropical marine field test[J]. Construction and Building Materials, 2020, 245:118463. [29] Morcillo M, Chico B, Alcántara J, et al. SEM/micro-Raman characterization of the morphologies of marine atmospheric corrosion products formed on mild steel[J]. Journal of the Electrochemical Society, 2016, 163(8): C426. [30] JIA J, CHENG X, YANG X, et al. A study for corrosion behavior of a new-type weathering steel used in harsh marine environment[J]. Construction and Building Materials, 2020, 259: 119760. [31] ZHANG T, XU X, LI Y, et al. The function of Cr on the rust formed on weathering steel performed in a simulated tropical marine atmosphere environment[J]. Construction and Building Materials, 2021, 277: 122298. [32] Dillmann P, Mazaudier F, Hoerle S. Advances in understanding atmospheric corrosion of iron. I. Rust characterisation of ancient ferrous artefacts exposed to indoor atmospheric corrosion[J]. Corrosion Science, 2004, 46(6):1401.
2023, Vol. 58 
