The Corrosion Fatigue Characteristic of Steel Strand Experiencing an Artificial Accelerated Salt Fog Ageing
YANG Shicong1, YAO Guowen1, ZHANG Jinquan1,2, SHI Kang3
1 College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074; 2 Research Institute of Highway Ministry of Transport, Beijing 100088; 3 College of Civil Engineering, Central South University, Changsha 410012
Abstract: To explore the corrosion fatigue characteristics of steel strand used for suspension cable under different loadings, the present work conducted a corrosion test for the steel strand under the artificially simulated conditions of alternating stress, static stress and non-stress, through the combinative apparatus of jack and salt fog test box. We first determined the steel strand’s corrosion states by means of quantitative histogram analysis, then launched the morphological and mechanical measurement after corrosion. Our experiment confirmed the steel strand’s corrosion extent sequence (experienced the same corrosion duration) with respect to the above mentioned three conditions: alternating stress condition, static stress condition and non-stress condition correspond to the high, intermediate and low corrosion extents, respectively. The corrosion duration, within a certain range, has an inconspicuous influence on the steel strand’s ultimate tensile stress, but while the corrosion progresses to more than 360 h, different loading conditions would lead to the diversity of the tensile strength’s variation trend. Also, only slight changes were observed in the fracture strength of the steel strand with a corrosion duration of less than 360 h, and thereafter the differentiation of fracture strengths emerges, with a particularly large decline of fracture strength under the alternating stress condition (individual specimen exhibits a fracture strength of only about 1 200 MPa after 720 h corrosion). It can also be indicated that the alternating stress and static stress result in pronounced decreases in the elongation at break of the corroded steel strand, the former of which holds a distinctly greater extent. The elongation at break with respect to the steel strand experienced salt fog corrosion under the non-stress condition also declines, but its change is relatively small compared to alternating stress and static stress.
杨世聪,姚国文,张劲泉,史康. 加速盐雾环境中钢绞线的腐蚀疲劳特征[J]. 《材料导报》期刊社, 2018, 32(12): 1988-1993.
YANG Shicong, YAO Guowen, ZHANG Jinquan, SHI Kang. The Corrosion Fatigue Characteristic of Steel Strand Experiencing an Artificial Accelerated Salt Fog Ageing. Materials Reports, 2018, 32(12): 1988-1993.
1 Yu Bo, Wu Ming, Yang Lvfeng. Corrosion behavior and prediction of corrosion rate for steel bar in concrete[J]. Journal of Building Materials,2014,17(5):774 (in Chinese). 余波,毋铭,杨绿峰.混凝土中钢筋的腐蚀行为及腐蚀速率预测[J].建筑材料学报,2014,17(5):774. 2 Zhang Junxi, Yi Bo, Lin Deyuan, et al. Electrochemical study on the corrosion of reinforced concrete under saline soil environment[J]. Journal of Building Materials,2014,19(2):390(in Chinese). 张俊喜,易博,林德源,等.盐渍土环境下钢筋混凝土腐蚀的电化学研究[J].建筑材料学报,2014,19(2):390. 3 Brown S G R, Barnard N C. 3D computer simulation of the influence of microstructure on the cut edge corrosion behavior of a zinc aluminum alloy galvanized steel[J]. Corrosion Science,2006,48:2291. 4 Barton S C. Accelerated corrosion and embrittlement of high-strength bridge wire[J]. Materials in Civil Engineering,2000,12(1):33. 5 Suzumura K, Nakamura S. Environmental factors affecting corrosion of galvanized steel wires[J]. Journal of Materials in Civil Engineering,2012,6:67. 6 Furuya K, Kitagawa M, Nakamura S, et al. Corrosion mechanism and new protection methods of suspension bridge cables[J]. Structural Engineering International,2010,10(3):189. 7 Li Fumin, Yuan Yingshu, Du Jianmin, et al. Deterioration of tensile behavior of steel strands corroded by chloride[J]. Journal of Southeast University(Natural Science Edition),2009,39(2):340(in Chinese). 李富民,袁迎曙,杜健民,等.氯盐腐蚀钢绞线的受拉性能退化特征[J].东南大学学报(自然科学版),2009,39(2):340. 8 Li Fumin. Effect of steel strands corrosion on prestressed concrete structures under chloride environment[D]. Xuzhou:China University of Mining and Technology,2008(in Chinese). 李富民.氯盐环境钢绞线预应力混凝土结构的腐蚀响应[D].徐州:中国矿业大学,2008. 9 Li Fumin, Yuan Yingshu, Zhang Jianqing. Distribution models of the fracture resistance of steel strands corroded by chloride[J]. Journal of Civil, Architectural & Environmental Engineering,2009,31(6):34(in Chinese). 李富民,袁迎曙,张建清. 氯盐腐蚀钢绞线的断裂抗力分布模型[J].土木建筑与环境工程,2009,31(6):34. 10 Li Fumin, Yuan Yingshu, Geng Ou, et al. Theoretical models of corrosion rate of steel bars embedded in concrete[J]. Journal of South China University of Technology(Natural Science Edition),2009,37(8):83(in Chinese). 李富民,袁迎曙,耿欧,等.混凝土中钢筋腐蚀速率的理论模型[J].华南理工大学学报(自然科学版),2009,37(8):83. 11 Wang Peng, Zhang Li, Wang Fumin, et al. Research on influence of time-varying effect of steel strand corrosion on prestressed concrete beam bridge[J]. Technology of Highway and Transport,2015(1):66(in Chinese). 王鹏,张力,王福敏,等.钢绞线腐蚀时变效应对预应力混凝土梁桥影响研究[J].公路交通技术,2015(1):66. 12 Xu Yang. Degradation state research of high-strength steel wires in corrosive conditions[D]. Harbin: Harbin Institute of Technology,2014(in Chinese). 徐阳. 腐蚀环境下斜拉索高强钢丝退化状态研究[D].哈尔滨: 哈尔滨工业大学,2014. 13 Yu Fang, Jia Jinqing, Yao Dali, et al. Experimental analysis of fatigue properties of corroded prestressingstrands[J]. Journal of Harbin Engineering University,2014,35(12):1487(in Chinese). 余芳,贾金青,姚大立,等.腐蚀预应力钢绞线的疲劳试验分析[J].哈尔滨工程大学学报,2014,35(12):1487. 14 Ruscheweyh H. The mechanism of rain-wind-induced vibration[J]. Wind Engineering into the 21st Century,1999,2:1041. 15 GB/T16545-2015.金属和合金的腐蚀试样上腐蚀产物的清除[S].北京:中国标准出版社,2016-06-01. 16 Jiang Dongxia. Experimental study of cable environmental corrosion damage under alternating stress[D]. Chongqing:Chongqing Jiaotong University,2013(in Chinese). 蒋冬夏.交变应力状态下拉索环境腐蚀损伤实验研究[D].重庆:重庆交通大学,2013. 17 Li Wenzhi. Cable cable force of salt spray corrosion and fatigue test of[D]. Chongqing:Chongqing Jiaotong University,2015(in Chinese). 李文治.盐雾环境下斜拉索索力腐蚀与疲劳试验研究[D].重庆:重庆交通大学,2015. 18 Meng Xiangqi. Experimental study on stress corrosion and corrosion fatigue properties of aluminum alloy[D]. Shanghai: Shanghai Jiaotong University,2012(in Chinese). 孟祥琦.铝合金材料的应力腐蚀及腐蚀疲劳特性实验研究[D].上海: 上海交通大学,2012.
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2018, Vol. 32 
