Print Email Facebook Twitter In-situ nanoscopic observations of dealloying-driven local corrosion from surface initiation to in-depth propagation Title In-situ nanoscopic observations of dealloying-driven local corrosion from surface initiation to in-depth propagation Author Kosari, A. (TU Delft (OLD) MSE-6) Zandbergen, H.W. (TU Delft QN/Zandbergen Lab; Kavli institute of nanoscience Delft) Tichelaar, F.D. (TU Delft QN/Afdelingsbureau; Kavli institute of nanoscience Delft) Visser, P. (Akzo Nobel) Taheri, P. (TU Delft (OLD) MSE-6) Terryn, H.A. (Vrije Universiteit Brussel) Mol, J.M.C. (TU Delft (OLD) MSE-6) Date 2020 Abstract Dealloying is involved in materials science responsible for fabrication of nanoscale structures beneficially but for corrosion degradations detrimentally. Detailed understanding related to the latter is critical for designing corrosion-resistance alloys and dedicated inhibition systems. Thus, direct nanoscopic observations of nano-structural and compositional evolutions during the process are essential. Here using liquid phase-transmission electron microscopy (LP-TEM), for the first time, we show dynamic evolution of intricate site-specific local corrosion linked to intermetallic particles (IMPs) in aerospace aluminium alloys. To thoroughly probe degradation events, oxidation direction is controlled by purposefully masking thin specimens, allowing for observing top-view surface initiation to cross-sectional depth propagation of local degradations. Real-time capturing validated and supported by post-mortem examinations shows a dealloying-driven process that initiates at IMPs and penetrates into the depth of the alloy, establishing macroscopic corrosion pits. Besides, controversial mechanisms of noble-metal redistribution are finally elucidated. Subject Aerospace aluminium alloysCopper redistributionDealloyingIn-situ liquid-phase TEMPitting corrosion To reference this document use: http://resolver.tudelft.nl/uuid:91dedb8a-175a-44f7-b614-eb5b21c1e0e3 DOI https://doi.org/10.1016/j.corsci.2020.108912 ISSN 0010-938X Source Corrosion Science: the journal on environmental degradation of materials and its control, 177 Part of collection Institutional Repository Document type journal article Rights © 2020 A. Kosari, H.W. Zandbergen, F.D. Tichelaar, P. Visser, P. Taheri, H.A. Terryn, J.M.C. Mol Files PDF 1_s2.0_S0010938X20315201_main.pdf 5.84 MB Close viewer /islandora/object/uuid:91dedb8a-175a-44f7-b614-eb5b21c1e0e3/datastream/OBJ/view