Liquid rust proof film-forming composition and rust proof film-f

Details Liquid rust proof film-forming composition and rust proof film-f Liquid rust proof film-forming composition and rust proof film-f

1996-07-18

1998-04-28

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148273, C23C 2778

Patent

active

057439710

ABSTRACT:
A liquid rust proof film-forming composition comprises (A) an oxidative substance, (B) a silicate and/or silicon dioxide and (C) at least one member selected from the group consisting of metal cations of Ti, Zr, Ce, Sr, V, W and Mo; and oxymetal anions and fluorometal anions thereof. The composition can be used in a method for forming a rust proof film on a metal substrate which comprises the step of immersing the metal substrate in the composition. The composition and the methods form an excellent rust proof film on the surface of metal substrates without using any chemical substance harmful to environment such as hexavalent chromium.

REFERENCES:
patent: 4349392 (1982-09-01), Huvar
patent: 4384902 (1983-05-01), Crotty et al.
patent: 5221371 (1993-06-01), Miller
patent: 5356492 (1994-10-01), Miller

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