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The effect of trace additions of copper and pretreatment conditions on the filiform corrosion of powder‐coated aluminium alloy AA6060
Author(s) -
Halseid Malgorzata,
Gundersen Jan Tore B.,
Bauger Øystein,
Hentschel Thomas
Publication year - 2019
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6621
Subject(s) - aluminium , copper , metallurgy , alloy , materials science , corrosion , aluminium alloy , copper alloy
This paper presents a short review of the literature data and the newest studies of filiform corrosion (FFC) testing of profiles extruded using a recycling‐friendly AA 6xxx aluminium alloy, with Cu content up to 0.09 wt%. As the pretreatment plays a significant role in avoiding FFC on powder‐coated aluminium profiles, the profiles were pretreated and coated at three different production sites. They have been tested at 40°C, 82% RH for 1000 hours (according to modified ISO 4623‐2). It was observed that differences in FFC behaviour of the same type of profile coated at different plants were more significant than differences between samples with increasing Cu content. In order to understand the differences between profiles coated at different sites, GDOES analysis of samples was performed, specially focusing on surface enrichment of copper through the pretreatment.