Study of a low alloy steel rust using Mössbauer spectroscopy.

Abstract

Mössbauer spectroscopy has been used to analyze the internal and external rust layers of a weathering steel exposed for ten months to an urban-industrial atmosphere. Superparamagnetic α-FeOOH and γ -FeOOH were found in both layers. The external one also contained small sized δ -FeOOH and/or amorphous iron oxyhydroxide. These compounds were not present in the internal layer at this stage of the patina formation.