C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 5/00 (2006.01)
Patent
CA 2754819
The present invention is directed to a method for coating a substrate comprising: (a) applying a caustic cleaner to at least a portion of the substrate; (b) rinsing at least a portion of the substrate that was subjected to step (a) with water; (c) applying an acid cleaner onto at least a portion of the caustically cleaned substrate; (d) rinsing at least a portion of the substrate that was subjected to step (c) with water; and (e) applying a conversion coating comprising zirconium onto at least a portion of the acid cleaned substrate; and wherein at least one of the materials used in steps (c) and (e) is substantially chrome free. The present invention is also directed to a substrate such as an aluminum substrate, that has been coated using the aforementioned method.
L'invention concerne un procédé de revêtement d'un substrat, qui comprend les étapes consistant à: (a) appliquer un nettoyant caustique sur au moins une partie du substrat; (b) rincer à l'eau au moins une partie du substrat ayant été soumis à l'étape (a); (c) appliquer un nettoyant acide sur au moins une partie du substrat nettoyé par des moyens caustiques; (d) rincer à l'eau au moins une partie du substrat ayant été soumis à l'étape (c); et (e) appliquer un revêtement de conversion comprenant du zirconium sur au moins une partie du substrat nettoyé par des moyens acides; au moins une des matières utilisées dans les étapes (c) et (e) est sensiblement dépourvue de chrome. L'invention concerne aussi un substrat tel qu'un substrat d'aluminium, qui a été revêtu à l'aide du procédé décrit.
Karabin Richard F.
Kaylo Alan J.
Mcmillen Mark W.
Miles Michelle S.
Peffer Robin M.
Borden Ladner Gervais Llp
Prc-Desoto International Inc.
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