Effect of Ce on corrosion behavior of duplex stainless steel in NaCl + HCl solution
LIU Xiao1, TONG Wei-shuo1, ZHAO Liang-qun1, CHEN Lei2, LIU Liu1
1. Jiangsu Metallurgical Technology Research Institute, Jiangsu Jicui Metallurgical Technology Research Institute Co., Ltd., Zhangjiagang 215625, Jiangsu, China; 2. College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
Abstract:In order to study corrosion resistance of duplex stainless steels in acid NaCl solution, corrosion resistance of UNS S31803 duplex stainless steel containing Ce in NaCl+HCl solution was tested by electrochemical anodic polarization and electrochemical impedance spectroscopy(EIS). The morphological characteristics after corrosion were observed by scanning electron microscope (SEM), the distribution characteristics of alloying elements and impurity elements were detected by electron probe micro-analyzer(EPMA), and the effect mechanism of Ce containing in the duplex stainless steels on the electrochemical corrosion behavior was analyzed. The results indicate that there is selective corrosion of two phases and local pitting corrosion in steel, and ferrite phase suffers more serious pitting corrosion. The results of anodic polarization and EIS are agreed very well, and the passivation range increases because of adding Ce. The corrosion resistance is improved due to the purification of molten steel, the reduction of S and P segregation at the phase boundary and the more uniform distribution of alloy elements such as Cr, Ni and Mo in the two phases by the addition of Ce.
刘晓, 童为硕, 赵良群, 陈雷, 刘浏. NaCl+HCl溶液中Ce对双相不锈钢腐蚀行为的影响[J]. 中国冶金, 2022, 32(6): 87-93.
LIU Xiao, TONG Wei-shuo, ZHAO Liang-qun, CHEN Lei, LIU Liu. Effect of Ce on corrosion behavior of duplex stainless steel in NaCl + HCl solution[J]. China Metallurgy, 2022, 32(6): 87-93.
ZHONG Hong-gang, CHEN Xiang-ru, LIU Yan-jie, et al. Influences of superheat and cooling intensity on macrostructure and macrosegregation of duplex stainless steel studied by thermal simulation[J]. Journal of Iron and Steel Research International, 2021, 28(9): 1125.
[6]
Olaseinde O A. Comparative study of the effect of temperature on the corrosion behaviour of 2205 duplex stainless steel and 316 austenitic stainless steel in acidic chloride environment[J]. Advances in Materials Physics and Chemistry, 2015, 5: 185.
Jeon S H, Kim H J, Kong K H, et al. Influence of annealing temperature on microstructure and pitting corrosion behavior of the 27Cr-7 Ni hyper duplex stainless steel[J]. Corrosion Science and Technology, 2014, 13(2): 48.
[9]
Jeon S H, Kim S T, Lee J S, et al. Effects of sulfur addition on the formation of inclusions and the corrosion behavior of super duplex stainless steels in chloride solutions of different pH[J]. Materials Transactions, 2012, 53 (9) 1617.
[10]
Jeon S H, Kim S T, Lee I S, et al. Effects of sulfur addition on pitting corrosion and machinability behavior of super duplex stainless steel containing rare earth metals: Part 2[J]. Corrosion Science, 2010, 52(10): 3537.
[11]
Shim S I, Park Y S, Kim S T, et al. Effects of rare earth metal addition on the cavitation erosion-corrosion resistance of super duplex stainless steels[J]. Metals and Materials International, 2002, 8(3): 301.
ZHANG G A, CHENG Y F. On the fundamentals of electrochemical corrosion of X65 steel in CO2-containing formation water in the presence of acetic acid in petroleum production[J]. Corrosion Science, 2009, 51(1): 87.
[14]
LÜ Jin-long, LIANG Tong-xiang, DONG Li-min, et al. Influence of sensitization on microstructure and passive property of AISI 2205 duplex stainless steel[J]. Corrosion Science, 2016, 104: 144.
[15]
Fernández-Domene R M, Blasco-Tamarit E, García-García D M, et al. Passive and transpassive behaviour of alloy 31 in a heavy brine LiBr solution[J]. Electrochimica Acta, 2013, 95: 1.
LIU Xiao, YANG Ji-chun, YANG Lin, et al. Effect of Ce on inclusions and impact property of 2Cr13 stainless steel[J]. Journal of Iron and Steel Research,International, 2010, 17(12): 59.
Tavares S S M, Pardal J M, Martins T R B, et al. Influence of sulfur content on the corrosion resistance of 17-4PH stainless steel[J]. Journal of Materials Engineering and Performance, 2017, 26(3): 2512.
[20]
WANG Kai, XU Ting-dong, SHAO Chong, et al. Nonequilibrium grain boundary segregation of sulfur and its effect on intergranular corrosion for 304 stainless steel[J]. Journal of Iron and Steel Research, International, 2011, 18(6): 61.
Pieraggi B, Rapp R A. Chromia scale growth in alloy oxidation and the reactive element effect[J]. Journal of the Electrochemical Society, 1993, 140(10): 2844.
[23]
Jang S H, Kim S T, Lee I S, et al. Effect of shielding gas composition on phase transformation and mechanism of pitting corrosion of hyper duplex stainless steel welds[J]. Materials Transactions, 2011, 52(6): 1228.