Evolution of Corrosion Products of Carbon Steels and Galvanized Steel in Simulated Marine Atmosphere

被引：2

作者：

Gao Y. ^{[1
]}

Huang Y.-H. ^{[1
]}

Meng X.-B. ^{[2
]}

Liao Y.-L. ^{[2
]}

Li R.-H. ^{[2
]}

机构：

[1] School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, Guangdong

[2] Electric Power Research Institute, CSG, Guangzhou, 510080, Guangdong

来源：

Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2017年 / 45卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Corrosion morphology; Corrosion product; Galvanized steel; Low carbon steel; Salt spray test;

D O I：

10.3969/j.issn.1000-565X.2017.09.019

中图分类号：

学科分类号：

摘要：

In order to investigate the evolution of the composition and form of steel corrosion products with time in simulated marine atmosphere, Q235, Q345 and galvanized Q235 steels were exposed in neutral salt spray boxes for 2, 6, 24, 48, 144, 240, 360 h. Then, the corrosion rates were calculated via the weight loss method, and the corrosion products were characterized by means of XRD and SEM. The results show that (1) the corrosion kinetics curves of the three kinds of steels follow the bilogarithmic equation; (2) the galvanized Q235 steel has a much lower corrosion rate than Q235 and Q345 steels, while the corrosion rate of Q235 steel is close to that of Q345 steel; (3) the corrosion products forming on Q235 and Q345 steels are mainly α-FeOOH, β-FeOOH, γ-FeOOH and Fe3O4, and the change rules of these products with the spraying time are different; (4) different corrosion products exhibit different topographic characteristics, specifically, γ-FeOOH, β-FeOOH and less reported Fe3O4 are respectively flower-like, cotton ball-like and spinelle-like; and (5) as compared with the two kinds of carbon steels, the galvanized Q235 steel has a more compact rust layer. © 2017, Editorial Department, Journal of South China University of Technology. All right reserved.

引用

页码：135 / 141

页数：6

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