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Photoelectron microscopy of filiform corrosion of aluminum
KTH, Superseded Departments, Physics. KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0003-1631-4293
KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0002-9453-1333
KTH, Superseded Departments, Physics.
KTH, Superseded Departments, Physics.ORCID iD: 0000-0001-7409-575X
2003 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 218, no 1-4, 154-161 p.Article in journal (Refereed) Published
Abstract [en]

Aluminum samples have been investigated during and after exposure to well-controlled amounts of NaCl and humidified air. With infrared reflection absorption spectroscopy the deliquescence of NaCl crystallites could be followed in situ at high relative humidity (RH), as well as the growth of different aluminum oxide, hydroxide and chloride corrosion products. Investigations with scanning electron microscopy and energy dispersive X-ray analysis after exposure revealed the growth of filaments representative of filiform corrosion and chlorine enrichment in the filament heads. The exposed samples were further investigated with synchrotron based photoelectron microscopy/spectroscopy. Spectra taken of the Al 2p core level showed an intricate structure with multiple components in the core level. By means of mapping the intensity of the different chemical states within the core level the distribution of compounds over the surface could be determined. An enrichment of aluminum chloride containing compounds was found in the heads of the filaments, whereas aluminum oxides or hydroxides were observed both inside and outside the filaments.

Place, publisher, year, edition, pages
2003. Vol. 218, no 1-4, 154-161 p.
Keyword [en]
aluminum, chloride, photoelectron microscopy, atmospheric corrosion, absorption spectroscopy, xps, oxidation, behavior, alloys, sheet
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-22835DOI: 10.1016/s019-4332(03)00574-9ISI: 000185491500020OAI: oai:DiVA.org:kth-22835DiVA: diva2:341533
Note
QC 20100525 Qc 20111205Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2011-12-05Bibliographically approved

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Weissenrieder, JonasLeygraf, ChristoferKarlsson, Ulf O.

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