Vol. 21, No. 6, pp. 476-487 (2025)
EVALUATION METHOD FOR MECHANICAL PROPERTIES OF
CORRODED ANGLE STEEL IN TRANSMISSION TOWERS
Wen-Qiang Jiang 1, 2, 3, *, Heng Zhang 1, Tong-Tong Dai 1, 2, 3, Yu-Cheng Guo 1 and Yue-Ming Zhong 1
1 Department of Mechanical Engineering, North China Electric Power University, Baoding, China
2 Hebei Engineering Research Center for Advanced Manufacturing & Intelligent Operation and Maintenance of Electric Power Machinery，North China Electric Power University, Baoding, China
3 Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, North China Electric Power University, Baoding 071003, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 5 July 2024; Revised: 27 February 2025; Accepted: 2 March 2025
DOI:10.18057/IJASC.2025.21.6.1
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ABSTRACT
Corrosion inevitably exists in transmission towers that have been in long-term field service. In order to study the corrosion properties of tower angle steel, the corroded steel specimens were prepared by accelerated corrosion test in this research. Combined with surface roughness and tensile test of the corroded specimens, the corrosion process of the steel specimens was explored, the degradation law of mechanical properties of the corrosion specimens was analyzed. Then, a method for estimating the corrosion rate of steel members by residual thickness was proposed. Moreover, the relationship between mechanical properties of corroded steel members and corrosion rate and surface roughness was established. The results show that the corrosion rate, the maximum pit depth and the maximum pit depth to width ratio are highly correlated with the strength degradation of corroded specimens. It is most effective to evaluate the strength of the specimens by the maximum pit depth.
KEYWORDS
Angle steel member, Corrosion, Surface roughness, Tensile test, Evaluation methods
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