C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/48 (2006.01) C23C 22/34 (2006.01) C23C 22/56 (2006.01) C23C 22/57 (2006.01)
Patent
CA 2332620
An aqueous bath for treating the surfaces of light metals and light metal alloys that does not contain hexavalent chromium or produce any other highly polluting effluent and that forms a highly corrosion-resistant and highly paint-adherent conversion coating has a pH from 1.0 to 7.0 and contains from 0.01 to 50 g/L of permanganic acid and/or salt(s) thereof and 0.01 to 20 g/L of at least one water soluble compound of titanium or zirconium.
L'invention concerne un bain aqueux permettant de traiter les surfaces des métaux légers et des alliages de métaux légers. Ce bain ne contient pas de chrome hexavalent ou ne produit pas d'autre effluent très polluant. Il forme une couche de conversion très résistante à la corrosion et qui adhère bien à la peinture. Son pH est compris entre 1,0 et 7,0. Il contient 0,01 à 50 g/l d'acide permanganique et/ou de ses sels, et 0,01 à 20 g/l d'au moins un composé hydrosoluble de titane ou de zirconium.
Kawaguchi Motoki
Maeda Kazuhiro
Nakada Kazuya
Henkel Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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