Research on corrosion mechanisms of locked coil wire ropes and corrosion fatigue performance of the Z-shaped steel wires

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Construction and Building Materials Pub Date : 2025-03-18 DOI:10.1016/j.conbuildmat.2025.140818

Liulu Guo , Bingjie Xu , Zhihua Chen , Hongbo Liu , Fan Zhang , Longxuan Wang , Zhengyan Yang

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Abstract

In this study, the corrosion mechanism and corrosion law of locked coil wire ropes are investigated using an acetic-acid accelerated salt-spray (AASS) corrosion test and Z-shaped steel wire. Subsequently, the fatigue-life of Z-shaped steel wire under different degrees of corrosion is obtained according to its performance in the fatigue test. The fatigue failure mechanism of a Z-shaped steel wire is studied by analyzing the fatigue fracture, and a fatigue-life prediction method is proposed based on a three-parameter Weibull distribution. Finally, a fatigue-life prediction method for locked coil wire ropes is proposed based on the corrosion law of locked coil wire ropes and fatigue performance of Z-shaped steel wires. The results indicate that the corrosion of locked coil wire ropes occurs only in the outer Z-shaped steel wire, the corrosion of the round steel wire can be ignored, and the existence of S-cracks in the fracture of the Z-shaped steel wire will accelerate fatigue failure. The results also verify that corrosion pits are the main source of fatigue in corroded Z-shaped steel wire, corrosion has a great impact on the fatigue life of steel wire. Under the conditions of 50 g/L NaCl solution concentration, 3.1–3.3 pH value, 95 % humidity and 35 ± 2°C temperature, salt spray accelerates corrosion for 3 months, and the fatigue life is reduced by about 40 %.

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锁紧线圈钢丝绳腐蚀机理及z形钢丝腐蚀疲劳性能研究

本研究采用醋酸加速盐雾（AASS）腐蚀试验对锁紧线圈钢丝绳的腐蚀机理和腐蚀规律进行了研究。根据z形钢丝在疲劳试验中的表现，得到了不同腐蚀程度下z形钢丝的疲劳寿命。通过对z形钢丝疲劳断裂的分析，研究了其疲劳失效机理，提出了一种基于三参数威布尔分布的疲劳寿命预测方法。最后，根据锁紧线圈钢丝绳的腐蚀规律和z形钢丝的疲劳性能，提出了锁紧线圈钢丝绳疲劳寿命预测方法。结果表明：锁紧线圈钢丝绳的腐蚀只发生在z形钢丝的外侧，圆形钢丝的腐蚀可以忽略不计，z形钢丝断口处s型裂纹的存在会加速疲劳破坏。结果还验证了腐蚀坑是腐蚀z形钢丝疲劳的主要来源，腐蚀对钢丝的疲劳寿命有很大影响。在NaCl溶液浓度为50 g/L、pH值为3.1 ~ 3.3 、湿度为95 %、温度为35 ± 2℃的条件下，盐雾加速腐蚀3个月，疲劳寿命降低约40 %。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.