Corrosion Behavior of Hot-dip Galvanized Steel for Power Transmission Tower in Simulated Acid Rain Atmospheric Environment

doi:10.11902/1005.4537.2014.015

Journal of Chinese Society for Corrosion and protection

2014, Vol. 34

Issue (5): 426-432 DOI: 10.11902/1005.4537.2014.015

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Corrosion Behavior of Hot-dip Galvanized Steel for Power Transmission Tower in Simulated Acid Rain Atmospheric Environment

LIU Yuwei¹, WANG Zhenyao¹(

), WANG Jun², HU Botao²

1. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2. Hunan Electric Power Corporation Research Institute, Changsha 410007, China

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Abstract

The evolution of corrosion process of hot-dip galvanized steel in a simulated acid rain atmospheric environment as a function of time was investigated by corrosion mass loss test, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and electrochemical techniques.<br>Consequently, corrosion kinetics, the surface and cross-sectional morphology and composition as well as electrochemical characters of corrosion products were acquired. The influence of the rust layers on the atmospheric corrosion of hot-dip galvanized steel was studied. According to the corrosion kinetics the rust layers can well protect the hot-dip galvanized steel from corrosion. The results of electrochemical measurement further illustrate that the protective effect of the rust layers is firstly enhanced, and then weakened as the corrosion time increases.

Key words: hot-dip galvanized steel simulated acid rain electrochemical technique atmospheric corrosion

ZTFLH:

TG172.3

About author: null

作者简介：刘雨薇，女，1990 年生，硕士生，研究方向为材料大气腐蚀

通讯作者：王振尧，E-mail：zhywang@imr.ac.cn

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	Yuwei LIU
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Cite this article:

LIU Yuwei, WANG Zhenyao, WANG Jun, HU Botao. Corrosion Behavior of Hot-dip Galvanized Steel for Power Transmission Tower in Simulated Acid Rain Atmospheric Environment. Journal of Chinese Society for Corrosion and protection, 2014, 34(5): 426-432.

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https://www.jcscp.org/EN/10.11902/1005.4537.2014.015 OR https://www.jcscp.org/EN/Y2014/V34/I5/426

Fig.1 Mass loss of hot-dip galvanized steel as a function of corrosion time

Fig.2 SEM images (a~e) of hot-dip galvanized steel after corrosion for 48 h (a), 84 h (b),132 h (c), 180 h (d) and 228 h (e) and EDS results of points 1 in Fig.2a and c (f) and point 2 in Fig.2c (g)

Fig.3 Cross sections of rust layer of hot-dip galvanized steel after corrosion for 48 h (a), 84 h (b), 132 h (c), 180 h (d) and 228 h (e)

Fig.4 Polarization curves of naked and rusted hot-dip galvanized steel as function of corrosion time

Fig.5 Nyquist plots of EIS results of hot-dip galvanized steel corroded for different time

Fig.6 Equivalent circuit

Table 1 Fitted EIS parameters of hot-dip galvanized steel

Fig.7 EIS parameters of R_ct and Q₁ as function of corrosion time

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