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Filiform corrosion formation on painted aluminium extrusions
Author(s) -
Nordlien J. H.,
Defrancq J.,
Züst W.,
Benmalek M.,
Stuckart R.
Publication year - 2000
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/1521-4176(200007)51:7<473::aid-maco473>3.0.co;2-c
Subject(s) - chromate conversion coating , corrosion , metallurgy , materials science , aluminium , chemistry , nuclear chemistry
Abstract The filiform corrosion susceptibility of extruded, chromated and coated AA 6060/6063 alloys has been investigated. It is shown that, provided sufficient metal is removed before chromating, these alloys will exhibit high filiform corrosion resistance. In those cases where extensive filiform corrosion attack is observed during corrosion testing it is shown to be due to a reactive surface region, formed during the thermo‐mechanical processing of the alloy and remaining after chemical pretreatment for painting.