Experimental and simulation analysis of mechanical property degradation of corrosion thinning of Q355 steel for transmission towers

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Anti-corrosion Methods and Materials Pub Date : 2024-07-09 DOI:10.1108/acmm-03-2024-2982

Xin Guo, Jiesong Tu, Zhibin Fan, Baoshuai Du, Hongfei Shang, Jiangfeng An, Dan Jia

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Abstract

Purpose

Corrosion thinning reduces the effective cross-sectional areas of steel structures and degrades their mechanical properties. This study aims to investigate the relationship between the corrosion thinning of carbon steel for transmission towers and the degradation of its mechanical properties.

Design/methodology/approach

A macroscopic finite element model of a transmission tower was established and then combined with the corrosion thinning and mechanical properties of Q355 steel in different test periods measured in neutral salt spray, SO₂ atmosphere and wet heat environments to conduct a finite element simulation of a transmission tower with different corrosion thinning of Q355 steel.

Findings

When the residual thickness of the tower leg angle was reduced to 4.03 mm, the maximum stress solved in the simulation exceeded the yield strength, with the tower already at risk of collapse owing to corrosion failure under extreme conditions of basic wind speed.

Originality/value

This study innovatively utilises transmission tower finite element models and experimental data from mechanical degradation experiments to quantify the relationship between corrosion thinning and the mechanical properties of Q355 steel, ensuring the effective assessment of the mechanical properties of corroded transmission towers.

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输电塔用 Q355 钢腐蚀减薄机械性能退化的实验和模拟分析

目的腐蚀减薄会减小钢结构的有效截面积并降低其机械性能。建立了输电塔的宏观有限元模型，然后结合 Q355 钢在中性盐雾、SO2 大气和湿热环境下不同试验周期测量的腐蚀减薄和力学性能，对 Q355 钢不同腐蚀减薄的输电塔进行有限元模拟。研究结果当塔腿角的残余厚度减小到 4.03 毫米时，模拟中求解的最大应力超过了屈服强度，在基本风速的极端条件下，铁塔已面临因腐蚀失效而倒塌的风险。原创性/价值这项研究创新性地利用输电塔有限元模型和机械退化实验数据，量化了腐蚀减薄与 Q355 钢机械性能之间的关系，确保了对腐蚀输电塔机械性能的有效评估。

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.