Corrosion Behavior of Q235 and Q345 Steel in Wuhan Atmospheric Environment for 24 Months

YU Jianfei, CHEN Zhijian, ZHANG Ming, ZHOU Xuejie, CHEN Hao, WU Jun, YANG Qin

doi:10.16577/j.issn.1001-1560.2025.0006

Materials Protection >

2025 , Vol. 58 >Issue 1: 56 - 63

DOI: https://doi.org/10.16577/j.issn.1001-1560.2025.0006

Corrosion Behavior of Q235 and Q345 Steel in Wuhan Atmospheric Environment for 24 Months

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(1.State Grid Hubei Electric Power Co.， Ltd.， Electric Power Scientific Research Institute， Wuhan 430077， China；2.China Academy of Machinery Wuhan Research Institute of Materials Protection Co.， Ltd.， Wuhan 430030， China；3.State Key Laboratory of Geological Processes and Mineral Resources， China University of Geosciences， Wuhan 430074， China)

CHEN Zhijian，Assistant Engineer， Research Focus: Material Environmental Corrosion， Tel.: 18771087124，E-mail: lurauion＠163.com

Received date: 2024-04-02

Revised date: 2024-08-26

Accepted date: 2024-08-28

Online published: 2025-02-28

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Abstract

In order to study the corrosion behavior of Q235 and Q345 steel commonly used in transmission tower equipment in the atmospheric environment of Wuhan， Hubei， a 24-month outdoor atmospheric exposure test was conducted at the Wuhan atmospheric exposure station.The samples were analyzed by macroscopic morphology analysis， microscopic morphology analysis， XRD analysis and electrochemical testing.Results showed that the corrosion weight loss of Q235 was about 1.5 times that of Q345.The corrosion products of Q235 and Q345 were mainly γ-FeOOH， α-FeOOH and Fe3 O4.Both types of steels were controlled by the anodic dissolution reaction during the corrosion process， and Q345 had better corrosion resistance than Q235.The stability of rust layers on Q235 and Q345 steel became more stable with prolonged exposure time.In addition， the self-corrosion potential increased， and the corrosion current density decreased.

Key words： Q235; Q345; atmospheric corrosion; Wuhan

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YU Jianfei, CHEN Zhijian, ZHANG Ming, ZHOU Xuejie, CHEN Hao, WU Jun, YANG Qin . Corrosion Behavior of Q235 and Q345 Steel in Wuhan Atmospheric Environment for 24 Months[J]. Materials Protection, 2025 , 58(1) : 56 -63 . DOI: 10.16577/j.issn.1001-1560.2025.0006

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