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The use of triarylmethane dyes on aluminium
Author(s) -
TsangarakiKaplanoglou I.,
Moshohoritou R.,
KallithrakasKontos N.
Publication year - 1996
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1996.tb01798.x
Subject(s) - aluminium , corrosion , aqueous solution , chemistry , acid dye , tin , adhesion , inorganic chemistry , materials science , organic chemistry , dyeing
Coatings have been formed on the surface of unanodised aluminium electrolytically treated in an aqueous solution of tin sulphate and a triarylmethane dye. The coatings produced had a good decorative appearance, good adhesion and were 3–5μm thick. The coloured films had excellent light fastness but poor resistance to corrosion resistance. The dyes showing the most promise for this application were CI Acid Blue 9 and CI Acid Green 5. These dyes interfered in the current flow, in so doing modifying the surface topography and the semiconductive properties of the superficial aluminium oxide film formed during the colouring treatment. The dye fragmentation, cyclisation and dimerisation products derived during the electrolytic treatment resulted in the formation of organotin compounds.