Abstract
The mechanical properties of steel corrosion products reported in the literature present a great dispersion. The present study aims to explore the mechanical behavior of naturally generated corrosion products at the microscale level in relation with typical microstructural features. Microstructural characterization was performed on corrosion products by nano-indentation, Raman micro-spectrometry, scanning electron microscopy and electron backscatter diffraction. The Young’s modulus and nanohardness range between 66.5 and 158.1 GPa and 2.97–11.71 GPa, respectively. The various morphologies and corresponding mechanical properties of goethite, maghemite and magnetite have finally been discussed, clarifying the influences of porosity, crystallinity and grain size on the mechanical properties.
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