Influence of Rust Layers on the Corrosion Behavior of Ultra-High Strength Steel 300M Subjected to Wet–Dry cyclic Environment with Chloride and Low Humidity  

作　　者：Qiang Guo Jian-Hua Liu Mei Yu Song-Mei Li 

机构地区：[1]Key Laboratory of Aerospace Materials and Performance(Ministry of Education), School of Materials Science and Engineering, Beihang University

出　　处：《Acta Metallurgica Sinica(English Letters)》2015年第2期139-146,共8页金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 51171011)

摘　　要：The influence of rust layers on the corrosion behavior of ultra-high strength steel 300M subjected to a simulated coastal atmosphere was investigated by corrosion weight loss, surface analysis techniques, and electrochemical methods. The results exhibit the presence of a large proportion of γ-FeOOH and α-FeOOH and a small amount of Fe3O4 in the outer rust layer. During the wet-dry cyclic process, the bonding performance and the density of outer rust layer deteriorate with the thickness of outer rust. The inner rust layer plays a main role on protectiveness, which can be attributed to the formation of an ultra-dense and adherent rust film with major constituent of α-FeOOH and α-Fe2O3 on the steel.The influence of rust layers on the corrosion behavior of ultra-high strength steel 300M subjected to a simulated coastal atmosphere was investigated by corrosion weight loss, surface analysis techniques, and electrochemical methods. The results exhibit the presence of a large proportion of γ-FeOOH and α-FeOOH and a small amount of Fe3O4 in the outer rust layer. During the wet-dry cyclic process, the bonding performance and the density of outer rust layer deteriorate with the thickness of outer rust. The inner rust layer plays a main role on protectiveness, which can be attributed to the formation of an ultra-dense and adherent rust film with major constituent of α-FeOOH and α-Fe2O3 on the steel.

关 键 词：Ultra-high strength steel Wet-dry CHLORIDE Corrosion RUST 

分 类 号：TG172[金属学及工艺—金属表面处理]