Corrosion-inhibiting composition

Details Corrosion-inhibiting composition Corrosion-inhibiting composition

1988-10-20

1991-08-20

Kyle, Deborah L.

Compositions

Preservative agents

Anti-corrosion

106 1421, 106 1444, C23F 1100, C23F 1500

Patent

active

050412418

ABSTRACT:
A corrosion-inhibiting composition comprises a blend of particles of two amorphous silicas; one containing corrosion-inhibiting cations releasable by ion-exchange and the second being substantially free of any corrosion-inhibiting ions. The weight ratio of the cation-containing silica to non ion containing silica is in the range 20:80 to 60:40.
The corrosion-inhibiting composition may be incorporated into liquid media and protective coatings, which are based on film-forming polymers e.g. epoxy resins, vinyl resins, epoxy esters.
The amorphous silica used is preferably of a microporous type. Calcium cations are the preferred corrosion inhibiting cations. The composition is preferable used to inhibit corrosion of aluminium surfaces.

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patent: 4643769 (1987-02-01), Othen
patent: 4687595 (1987-08-01), Howes et al.
patent: 4795492 (1989-01-01), Othen

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