Berlin 2005 – wissenschaftliches Programm
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O: Oberflächenphysik
O 36: Postersitzung (Elektronische Struktur, Grenzfl
äche fest-flüssig, Halbleiteroberfl
ächen und -grenzfl
ächen, Nanostrukturen, Oberfl
ächenreaktionen, Teilchen und Cluster, Struktur und Dynamik reiner Oberfl
ächen)
O 36.61: Poster
Montag, 7. März 2005, 15:00–18:00, Poster TU F
Corrosion of chemical and mechanical stressed aluminium components studied with MIES, UPS, XPS and AES — •Florian Voigts1, Martin Frerichs1, Volker Kempter1, Sven Hollunder2, Alfons Esderts2, and Wolfgang Maus-Friedrichs1 — 1Institut für Physik und Physikalische Technologien, TU Clausthal, Leibnizstrasse 4, 38678 Clausthal — 2Institut für Maschinelle Anlagentechnik und Betriebsfestigkeit, TU Clausthal, Leibnizstrasse 32, 38678 Clausthal
The corrosion of aluminium by exposure to different gases, liquids and especially commercially available disinfectants was studied by means of Auger Electron Spectroscopy (AES), X-Ray Photoelectron Spectroscopy (XPS), Ultraviolet Photoelectron Spectroscopy (UPS), Metastable Impact Electron Spectroscopy (MIES) and fatigue tests. Aluminium components from industrial application as well as aluminium films produced in ultrahigh vacuum (UHV) were used as specimen.
Fatigue tests show a massively reduced lifetime of aluminium components when exposed to disinfectants regularly. Commonly applied protective coatings decrease the lifetime even further.
Our measurements are able to provide information on the state of oxidation, the progress of the corrosion and the influence of various elements present at the surface. Experiments under controlled conditions yield a picture of the reaction mechanisms with selected elements like water, oxygen and salt. We attempt to provide a model for the mechanism of the corrosion and its effect on the durability of the components.