Investigation of the Corrosion Resistance of Weathering Steel at Different Atmospheric Environment

Abstract:

The corrosion resistances of a weathering steel SPA-H and a carbon steel Q345 after atmospheric corrosion rests of two cities were measured. The results showed that the corrosion resistance was better for SPA-H than Q345 based on the corrosion rate. The corrosion rates of two steels at Qionghai city were lower than those of Jiangjin city. The characterization of the rusts showed the rust layer on SPA-H was denser and thinner than that of Q345. The rust layers were mainly composed of goethite (α-FeOOH) with a few of lepidocrocite (γ-FeOOH). SPA-H had better weatherability attributed to the alloying elements of copper, chromium and phosphorus enriched in the rust layer. The environment factor such as the sedimentation of SO2 has more effect on the corrosion rates than other factors such as alloy elements.

• Periodical: Advanced Materials Research (Volume 629)
• Pages: 240-244
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.629.240
• Online since: December 2012
• Authors: Zhi Fen Wang, Jian Rong Liu, Li Xin Wu, Yi Qiang Sun, Rong Dong Han
• Keywords: Corrosion Resistance, Rust Layer, Weathering Steel

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