Corrosion Evolution of Anchor Cable Material in Multi-factor Coupling Environment

LIAO Ling-min; XIAO Wei; WANG Yuan-yi; LIANG Kai

doi:10.11988/ckyyb.20221145

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Journal of Changjiang River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (4) : 127-133. DOI: 10.11988/ckyyb.20221145

HYDRAULIC STRUCTURE AND MATERIAL

Corrosion Evolution of Anchor Cable Material in Multi-factor Coupling Environment

LIAO Ling-min^1,2,3, XIAO Wei^2,4, WANG Yuan-yi^1,2,3, LIANG Kai^1,2,3

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Abstract

The aim of this research is to truly and comprehensively understand the corrosion durability of anchor cable serving in the complex multi-factor corrosion environment. Indoor accelerated corrosion test of prestressed anchor cable under the coupling action of pH value, Cl^-, SO₄^2-, and stress near real load was carried out. The change characteristics of anchoring load of the anchor steel strand during the test were monitored. The appearance development of steel strand corrosion, the structural characteristics of corrosion products, and the time-dependent variation of mass loss per unit length and tensile strength loss rate were systematically studied by using material microscopic characterization method and mechanical property testing. The corresponding corrosion reaction mechanism was also analyzed. Results reveal that load stress intensifies the corrosion of steel strand. Compared with that in stress-free condition, the loss rate of tensile strength of steel strand in high stress condition is significantly higher. The simultaneous presence of SO₄^2- and Cl^- accelerates the corrosion of steel strand more than the single presence of SO₄² or Cl^-. Moreover,the corrosion degree in alkaline solution is relatively lower than that in acidic solution. After one year of accelerated corrosion test, the maximum mass loss per unit length of steel strand can reach 0.5 g/cm, and the maximum loss rate of tensile strength can reach nearly 50%. The research findings offer scientific basis and data support for evaluating and predicting the corrosion durability of anchor cable in real service environment.

Key words

anchor cable / corrosion / coupling factors / evolution law / accelerated test

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LIAO Ling-min, XIAO Wei, WANG Yuan-yi, LIANG Kai. Corrosion Evolution of Anchor Cable Material in Multi-factor Coupling Environment[J]. Journal of Changjiang River Scientific Research Institute. 2023, 40(4): 127-133 https://doi.org/10.11988/ckyyb.20221145

References

[1] 朱杰兵,王小伟. 高边坡预应力锚固结构腐蚀损伤与诊断研究进展. 长江科学院院报,2018,35(11):1-6,19.
[2] 王玉杰, 尹韬, 孙兴松, 等. 丰满老坝加固预应力锚索服役近30年后性能评价研究. 岩石力学与工程学报, 2022, 41(1): 62-69.
[3] MANNS W G, LITTLEJOHN S. Long-term Influence of Aggressive Carbonic Acid upon the Bearing Capacity of Ground Anchors//Ground Anchorages and Anchored Structures. London: Thomas Telford, 1997: 393-397.
[4] GAMBOA E, ATRENS A. Stress Corrosion Cracking Fracture Mechanisms in Rock Bolts. Journal of Materials Science, 2003, 38(18): 3813-3829.
[5] GAMBOA E, ATRENS A. Material Influence on the Stress Corrosion Cracking of Rock Bolts. Engineering Failure Analysis, 2005, 12(2): 201-235.
[6] GAMBOA E, ATRENS A. Environmental Influence on the Stress Corrosion Cracking of Rock Bolts. Engineering Failure Analysis, 2003, 10(5): 521-558.
[7] VILLALBA E, ATRENS A. Metallurgical Aspects of Rock Bolt Stress Corrosion Cracking. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2008, 491(1/2): 8-18.
[8] LI F M, LIU Z G, ZHAO Y, et al. Experimental Study on Corrosion Progress of Interior Bond Section of Anchor Cables under Chloride Attack. Construction and Building Materials, 2014, 71(30): 344-353.
[9] 汪剑辉,曾宪明,赵强.多因素耦合腐蚀环境下锚杆腐蚀机制试验研究.施工技术,2006,35(11):30-33.
[10] 梁健. 基于多因素耦合的锚杆锚固结构耐久性研究. 重庆: 重庆大学, 2016.
[11] WANG B,GUO X, JIN H, et al. Experimental Study on Degradation Behaviors of Rock Bolt under the Coupled Effect of Stress and Corrosion. Construction and Building Materials, 2019, 214: 37-48.
[12] 朱杰兵, 李聪, 刘智俊, 等. 腐蚀环境下预应力锚筋损伤试验研究. 岩石力学与工程学报, 2017, 36(7): 1579-1587.
[13] ZHU J, WANG X, LI C, et al. Corrosion Damage Behavior of Prestressed Rock Bolts under Aggressive Environment. KSCE Journal of Civil Engineering, 2019, 23(7): 3135-3145.
[14] 王小伟, 朱杰兵, 阮怀宁, 等. 考虑通氧环境的预应力锚杆腐蚀损伤时变特征. 长江科学院院报, 2022, 39(3): 86-91.
[15] 王小伟, 朱杰兵, 李聪. pH和O₂协同作用下预应力锚杆腐蚀损伤行为试验研究. 岩土力学, 2019, 40(11): 4306-4312,4370.
[16] 李英勇, 张思峰, 王松根, 等. 预应力锚固结构腐蚀介质作用下的耐久性试验研究. 岩石力学与工程学报, 2008, 27(8): 1626-1633.
[17] 张思峰. 预应力内锚固段作用机理及其耐久性研究. 上海: 同济大学, 2007.
[18] 廖灵敏, 肖承京, 祁勇峰, 等. 预应力锚索腐蚀耐久性试验方案设计探讨. 人民长江, 2015, 46(23): 69-72,103.
[19] 曾宪明, 雷志梁, 张文巾, 等. 关于锚杆“定时炸弹”问题的讨论:答郭映忠教授.岩石力学与工程学报, 2002, 21(1): 143-147.
[20] 冯忠居, 江冠, 赵瑞欣, 等. 基于多因素耦合效应的锚索预应力长期损失研究. 岩土力学, 2021, 42(8): 2215-2224.
[21] 高大水, 曾勇. 三峡永久船闸高边坡锚索预应力状态监测分析. 岩石力学与工程学报, 2001, 20(5): 653-656.
[22] 惠云玲.锈蚀钢筋性能试验研究分析. 工业建筑, 1997, 27(6): 10-13.
[23] 潘保武. 低合金高强度钢应力腐蚀研究. 太原:中北大学, 2008.
[24] 张心宇, 王立达, 孙文, 等. 纯铁的腐蚀产物对纯铁腐蚀行为的影响及其机理研究. 材料保护, 2021, 54(7):30-36.
[25] 郭明晓, 潘晨, 王振尧, 等. 碳钢在模拟海洋工业大气环境中初期腐蚀行为研究.金属学报, 2018, 54(1): 65-75.