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Examination of the metastable and stable pitting corrosion of aluminum modified with carbon by ion beam techniques

Lensch, O. ; Enders, B. ; Knecht, J. ; Ensinger, W. (2001)
Examination of the metastable and stable pitting corrosion of aluminum modified with carbon by ion beam techniques.
In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, (175-177)
doi: 10.1016/S0168-583X(01)00373-1
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

It is well known that aluminum and aluminum alloys are sensitive to pitting corrosion when exposed to aqueous solutions containing aggressive anions like halides. The destructive nature of pitting is due to its high local dissolution rates at electrode potentials above the so-called pitting potential Up. Recently, it has been realized that also at potentials below Up, in the passive and cathodic regions and around the free corrosion potential, anodic current transients appear which have been attributed to metastable pitting events. For the purpose of full characterization of the pitting behavior, a program routine has been developed where the occurrence frequency, lifetime and rate of metastable pitting events are extracted from potentiostatic current/time-measurements depending on the electrode potential. The routine has been applied to measurements of carbon modified pure aluminum. Carbon modifications were done with carbon evaporation and carbon sputtering under concurrent argon ion bombardment. The results are discussed in terms of the applied modification technique, their parameters and their effects on the corrosion protection ability of aluminum modified by carbon.

Typ des Eintrags: Artikel
Erschienen: 2001
Autor(en): Lensch, O. ; Enders, B. ; Knecht, J. ; Ensinger, W.
Art des Eintrags: Bibliographie
Titel: Examination of the metastable and stable pitting corrosion of aluminum modified with carbon by ion beam techniques
Sprache: Englisch
Publikationsjahr: April 2001
Verlag: Elsevier
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
(Heft-)Nummer: 175-177
DOI: 10.1016/S0168-583X(01)00373-1
Kurzbeschreibung (Abstract):

It is well known that aluminum and aluminum alloys are sensitive to pitting corrosion when exposed to aqueous solutions containing aggressive anions like halides. The destructive nature of pitting is due to its high local dissolution rates at electrode potentials above the so-called pitting potential Up. Recently, it has been realized that also at potentials below Up, in the passive and cathodic regions and around the free corrosion potential, anodic current transients appear which have been attributed to metastable pitting events. For the purpose of full characterization of the pitting behavior, a program routine has been developed where the occurrence frequency, lifetime and rate of metastable pitting events are extracted from potentiostatic current/time-measurements depending on the electrode potential. The routine has been applied to measurements of carbon modified pure aluminum. Carbon modifications were done with carbon evaporation and carbon sputtering under concurrent argon ion bombardment. The results are discussed in terms of the applied modification technique, their parameters and their effects on the corrosion protection ability of aluminum modified by carbon.

Freie Schlagworte: Ion beam assisted deposition, Ion beam assisted sputtering, Carbon coating, Aluminum, Corrosion protection, Metastable and stable pitting corrosion
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik
Hinterlegungsdatum: 26 Jun 2012 07:36
Letzte Änderung: 30 Aug 2018 12:48
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