2009•Ironmaking & Steelmaking Processes Products and ApplicationsRequires access

Effect of Grain Size on the Corrosion Resistance of Corten-B Weathering Steel

Zhe Shi

Abstract

Three kinds of Corten-B weathering steels of different grain size with the same chemical composition were prepared by different rolling and heat treat process.The relationship between grain size and atmospheric corrosion resistance of Corten-B weathering steels in industrial atmospheric environment has been investigated by optical microscope,cyclic immersion corrosion test,micro-analysis of rust and electrochemical test.The results show that as the grain size of Corten-B weathering steel decreases from 30 μm to 4 μm,the crack and cavity in the rust after cycle immersion corrosion test decrease,the corrosion rate decreases,rust resistance Rr and corrosion reaction resistance Rt increase,the atmospheric resistance is improved.

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Key concepts: Corrosion, Weathering steel, Grain size, Metallurgy, Materials science, Weathering, Immersion (mathematics), Rust (programming language)