Surface treatment composition, surface treatment solution and su

Details Surface treatment composition, surface treatment solution and su Surface treatment composition, surface treatment solution and su

1996-11-18

1998-03-17

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

C23C 2200

Patent

active

057282331

ABSTRACT:
A highly uniform thin protective coating, with good appearance, anti-corrosion properties and adhesion properties, is provided by a surface treatment method wherein a surface treatment solution for aluminum and its alloys is prepared using a surface treatment composition for aluminum and its alloys comprising at least one type of phosphoric acid, condensed phosphoric acid or salt of these acids, at least one type of zirconium salt or titanium salt and effective fluoride, further comprising at least one type of phosphorous acid, hypophosphorous acid or salts of these acids, and this solution is brought in contact with the surface of an aluminum type metal.

REFERENCES:
patent: 4148670 (1979-04-01), Kelly
patent: 4264378 (1981-04-01), Oppen et al.
patent: 5449415 (1995-09-01), Dolan

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