Effect of Corrosion Resistance and Rust Characterization for Hydrogen Absorption and hydrogen embrittlement under an Atmospheric Corrosion Condition

摘要

In recent years, strong demands for improved automobile fuel economy through the reduction of car body weight have increased the need for the development of high strength steels. However, there is a concern of "delayed fracture (hydrogen embrittlement)" which is considered to absorb hydrogen into steels while using these steels in applications that require high strength steels exceeding 1180 MPa. Corrosion of steel under an atmospheric corrosion condition which is assumed to be the environment in which vehicles are used, is considered to be progress in accordance with the Evans model and hydrogen are absorbed into steels. As shown in weathering steels, it is thought that the characterization and properties of rust have an important influence on the generation and absorption of hydrogen.