Surface treatment chemicals and bath for aluminum or its...

Details Surface treatment chemicals and bath for aluminum or its... Surface treatment chemicals and bath for aluminum or its...

C - Chemistry, Metallurgy

23

C

148/17

C23C 22/36 (2006.01) C23C 22/56 (2006.01)

Patent

CA 2022254

ABSTRACT OF THE DISCLOSURE A surface treatment chemical composition for aluminum or its alloys consisting essentially of 10-1000 parts by weight of one or more ions of metals selected from the group consisting of scandium, yttrium, lanthanum, praseodymium, neodymium! samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, 10-500 parts by weight of zirconium ion, 10-500 parts by weight of phosphate ion and 1-50 parts by weight of effective fluorine ion. A surface treatment bath for aluminum or its alloy consisting essentially of 10-1000 ppm of one or more ions of metals selected from the group consisting of scandium, yttrium, lanthanum, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, 10-500 ppm of zirconium ion, 10-500 ppm of phosphate ion and 1-50 ppm of effective fluorine ion, and having a pH of 1.8-4Ø

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