FORMATION OF NANOCRYSTALLINE SURFACE-LAYERS BY ANNEALING AND THEIR ROLE IN FILIFORM CORROSION OF ALUMINUM SHEET

Authors
LETHOLSEN H NORDLIEN JH NISANCIOGLU K
Citation
H. Letholsen et al., FORMATION OF NANOCRYSTALLINE SURFACE-LAYERS BY ANNEALING AND THEIR ROLE IN FILIFORM CORROSION OF ALUMINUM SHEET, Journal of the Electrochemical Society, 144(7), 1997, pp. 196-197
Citations number
11
Categorie Soggetti
Electrochemistry
Journal title
Journal of the Electrochemical Society → ACNP
ISSN journal
00134651
Volume
144
Issue
7
Year of publication
1997
Pages
196 - 197
Database
ISI
SICI code
0013-4651(1997)144:7<196:FONSBA>2.0.ZU;2-P
Abstract
Annealing of specific rolled aluminum alloys at temperatures above 300 degrees C causes a significant increase in the filiform corrosion sus ceptibility of the painted substrate. As demonstrated for a selected s ubstrate (AA8006), the increased susceptibility is related to the form ation of a thin, (electro-)chemically active nanocrystalline layer at the surface as a result of the annealing treatment. The corrosion resi stance is significantly improved by removing the layer by etching duri ng surface treatment. Possible causes of layer formation and its activ ity are discussed.