C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
31/43
C09D 5/08 (2006.01) C09C 1/00 (2006.01) C09C 1/24 (2006.01) C09C 1/30 (2006.01) C09C 1/42 (2006.01) C09C 3/06 (2006.01) C23F 11/18 (2006.01)
Patent
CA 1185780
ABSTRACT OF THE DISCLOSURE METHOD OF INHIBITING CORROSION USING CATIONS A corrosion inhibitor comprises particles of an inorganic oxide having cations of yttrium or cations of one or more metals of the lanthanide group chemically bound to the particles by ion-exchange. The cations are released by ion-exchange with other cations and not by the water solubility of the corrosion inhibitor. The corrosion inhibiting particles may be prepared by contacting particles of the inorganic oxide with an aqueous solution containing the required cations. Alternatively. the particles of the inorganic oxide may be contacted with an aqueous solution of a alkali metal so that alkali metal ions are exchanged onto the surface of the oxide and then contacting the alkali metal exchanged oxide with a solution of the required cations so that the required cations replace the alkali metal cations. The corrosion inhibiting particles may be incorporated into protective coatings e.g. paints based on epoxy resins, alkyd resins, vinyl resins or chlorinated rubbers in amounts up to 80% wt based on the dry film weight of the coating.
423940
Goldie Brian P.f.
Mccarroll John J.
British Petroleum Company P.l.c. The
Ridout & Maybee Llp
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