Surface treatment chemical and bath for aluminum and its alloy
AssigneeNippon Paint Co., Ltd.
InventorSatoshi Ikeda
Life of this patent
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Abstract
A surface treatment chemical for aluminum or its alloy comprising 10-1000 parts by weight of vanadium or cerium ion, 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 comprising 10-1000 ppm of vanadium or cerium ion, 10-500 ppm of zirconium ion, 10-500 ppm of phosphate ion and 1-50 ppm of effective fluorine ion, and having pH of 2.0-4.0.
Claims10
A surface treatment chemical for aluminum or an alloy of aluminum which consists essentially of 10-1000 parts by weight of vanadium or cerium ion, 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;
- which surface treatment chemical is capable of being diluted to a pH of 2.0-4.0.
Dependencies are inferred from the claim text.