Process for the treatment of a metal oxide layer, a process for

Details Process for the treatment of a metal oxide layer, a process for Process for the treatment of a metal oxide layer, a process for

1989-02-02

1991-05-07

Gallagher, John J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156319, 427343, 428469, 428629, B32B 3100

Patent

active

050133810

ABSTRACT:
The naturally occurring metal oxide layer in contact with a metal in the bulk state is treated with a solution of a salt of yttrium or the lanthanide metals. The treatment is applied in order to increase the adhesive strength of bonds between the metal and subsequently applied adhesives and to enhance the durability of such bonds in aqueous environments. The concentration of the applied solution is preferably in the range 10.sup.-2 to 10.sup.-6 M. Yttrium or samarium nitrate is the preferred salt. The treatment is preferably used in conjunction with epoxy resin adhesives.

REFERENCES:
patent: 2913813 (1959-11-01), Homer et al.
patent: 3592681 (1971-07-01), Hatwell et al.
patent: 4474607 (1984-10-01), Gordie et al.
patent: 4749550 (1988-06-01), Gordie et al.

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