Abstract
The corrosion processes of AA 2024 were analysed via the combined approach of advanced in situ and ex situ analytical tools. Firstly, IR reflection–absorption spectroscopy enabled the identification of a pseudo-boehmite layer on initial surface, which remained present also after the ex situ spectroelectrochemical treatment at different potentials. Secondly, formation of oxyhydroxides was confirmed by confocal Raman spectroscopy. To get a deeper insight into the morphology changes, a three-electrode in situ electrochemical AFM cell was constructed. The results of in situ measurements revealed a gradual increase in the surface roughness. Trenching around intermetallic particles and corrosion deposits were also observed.
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