Elucidation of Atmospheric Corrosion Mechanism of Steels by Artificially Synthesized Iron Rust Particles

Abstract

In order to clarify the atmospheric corrosion process of steel in different exposure environments, various methods such as exposure test, salt spray test, accelerated corrosion test, combined wet-dry cyclic corrosion test have been used. Our group has proposed that the rust formation by atmospheric corrosion in thin film water and/or adsorbed water on the steels regards as the reaction of metal ions eluted from steel and anions generated by dissolution of corrosive gasses such as NaCl, SO_x and NO_x. Therefore, simulating study using the artificial iron rust particles is effective to understand the rust formation process on the steels. In this review, influence of cations and anions on the structure, composition and morphology of artificially synthesized iron rust particles was described centering on our researches.