A Comprehensive Mechanism of the Development of Protective Rust Layers on Weathering Steel

概要

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In view of the fact that the mechanisms proposed to date to explain the process by which the alloying elements in weathering steel improve the protective nature of rust layers have been limited to certain phases of study on rust, i.e., composition and structure, matrix, and electrochemical behavior, a comprehensive mechanism is proposed based on the present author's earlier studies and a survey of publications by others. The deciding factor of good resistance of weathering steel to atmospheric corrosion is the continuous nature of the rust layers, and contribution of the porosity of the continuous layer is not significant. The defects that impair the continuity of the rust layer is the sulfate nests, which are inactivated by the presence of the beneficial alloying elements during the process of the amorphous rust layer formation. The electrochemical reactions of the rust are not a significant factor that affects the formation of protective rust layers.
前橋工科大学の論文
1999-03-25