Effect of Electric Field on Corrosion Behavior of Carbon Steel in Humid and Hot Environment

LI Guangmao; DU Gang; WANG Yong; PANG Zhikai; ZHOU Hongling; YANG Jie; FAN Weinan

doi:10.13296/j.1001-1609.hva.2022.06.020

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Effect of Electric Field on Corrosion Behavior of Carbon Steel in Humid and Hot Environment

更新时间：2025-04-26

- Effect of Electric Field on Corrosion Behavior of Carbon Steel in Humid and Hot Environment
- High VoltageApparatus Vol. 58, Issue 6, Pages: 144-149+156(2022)
- 作者机构：
  
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- DOI：10.13296/j.1001-1609.hva.2022.06.020
  CLC： TM75
- Published：2022
- 稿件说明：
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LI Guangmao, DU Gang, WANG Yong, et al. Effect of Electric Field on Corrosion Behavior of Carbon Steel in Humid and Hot Environment[J]. High voltageapparatus, 2022, 58(6): 144-149+156.
DOI：

LI Guangmao, DU Gang, WANG Yong, et al. Effect of Electric Field on Corrosion Behavior of Carbon Steel in Humid and Hot Environment[J]. High voltageapparatus, 2022, 58(6): 144-149+156. DOI： 10.13296/j.1001-1609.hva.2022.06.020.

摘要

采用腐蚀产物形貌结构分析方法（SEM、EDS、XRD）以及电化学测试方法，研究了在模拟高温高湿环境下腐蚀时间以及外加不同强度直流电场对电力杆塔用碳钢腐蚀行为、腐蚀产物以及形貌结构的影响。结果表明，随着腐蚀时间的延长，碳钢表面的腐蚀产物不断发生变化，腐蚀最初期的腐蚀产物以棉球状α-FeOOH为主，逐渐发展变化为片状的γ-FeOOH和尖晶长条状的Fe3O4，导致表面的腐蚀产物致密性相比腐蚀初期大大减小，对内部基底的保护作用减弱。而电场的存在则会在腐蚀时间作用的基础上进一步抑制α-FeOOH的生成、加速γ-FeOOH的生长，同时电场强度越大形成的γ-FeOOH的形貌结构越疏松分散，致密性越差，从而进一步加速腐蚀往深层次的进行。

Abstract

The effects of corrosion time and different DC electric field in humid and hot environment on the corrosion behavior

corrosion products and morphology of carbon steel for power tower are studied by means of SEM

EDS

XRD and electrochemical test. The results show that the with the extension of corrosion time corrosion products on the surface of carbon steel change continuously

and the corrosion products in the initial stage of corrosion are cotton ballsα-FeOOH and gradually develops and changes into flake γ-FeOOH and long spinel Fe3O4

which lead to a great reduction in the compactness of corrosion products on the surface compared with the initial stage of corrosion

and the protection effect on the internal substrate is weakened. While

the existence of electric field will further suppress the generation of α-FeOOH on the basis of corrosion time and accelerate γ-FeOOH’s growth and

at the same time

the greater the electric field is

the looser of the morphology formation of γ-FeOOH is

the worse of the compactness is

which accelerate the corrosion to a deeper level further.

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