Abstract
In-situ observation of the materials being damaged by aqueous corrosion and corrosion fatigue with high magnification is significant for the understanding of these mechanisms. In this study, in-situ observation of Au, Fe, SUS304 steel and SNCM439 steel under potential control in 1% NaCl and 0.1% HNO3 solutions is performed by STM. The STM image can be observed for all materials both in anodic and cathodic potentials if the proper tunnel bias is applied. In cathodic potential the STM image does not change with time, while in anodic potential the STM image changes rapidly unless the material is passive condition.
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