Compositions – Preservative agents – Anti-corrosion
Patent
1990-08-01
1992-04-14
Kyle, Deborah L.
Compositions
Preservative agents
Anti-corrosion
422 7, 148247, 148248, C23F 1118
Patent
active
051045770
ABSTRACT:
A surface treatment chemical for aluminum or its alloy 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, yttterbium 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 1.8-4.0.
REFERENCES:
patent: 4187127 (1980-02-01), Yashiro
patent: 4273592 (1981-06-01), Kelly
patent: 4294627 (1981-10-01), Heyes
patent: 4338140 (1982-07-01), Reghi
patent: 4863526 (1989-09-01), Miyagawa et al.
Ikeda Satoshi
Meguro Shigeyuki
Fee Valerie
Kyle Deborah L.
Nippon Paint Co. Ltd.
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