C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
C23F 1/20 (2006.01) C23F 1/16 (2006.01) C23F 3/03 (2006.01) C23G 1/12 (2006.01)
Patent
CA 2618915
The invention relates to compositions and methods that are useful in etching a metal surface. In particular, the invention relates to novel acid compositions and methods of using such compositions in etching a metal surface, preferably an aluminum surface prior to anodizing to dissolve impurities, imperfections, scale, and oxide. The compositions are effective in maintaining their etching capacity and in removing smut produced by the etching of a surface as well as in general cleaning.
L'invention concerne des compositions et des procédés destinés à l'attaque d'une surface métallique. L'invention concerne plus précisément des compositions acides et des procédés dans lesquels ces compositions sont utilisées pour attaquer une surface métallique, de préférence une surface d'aluminium, avant l'étape d'oxydation anodique, pour dissoudre les impuretés, les imperfections et la couche d'oxyde. Les compositions de l'invention conservent leur capacité d'attaque et permettent d'enlever facilement les dépôts produits lors de l'attaque d'une surface et dans des applications de nettoyage général.
Basaly Mores
Gowling Lafleur Henderson Llp
Houghton Metal Finishing Company
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