Coating composition and method of forming

A coating composition for ferrous metal alloy surfaces comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and aluminum powder. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ALVIN R. STETSON, WILLIAM D. BRENTNALL, ZAHER Z. MUTASIM
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL PAINT OR INK REMOVERS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE CORRECTING FLUIDS DIFFUSION TREATMENT OF METALLIC MATERIAL DYES FILLING PASTES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INKS LIME, MAGNESIA METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES REFRACTORIES SLAG SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF NATURAL STONE USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	A coating composition for ferrous metal alloy surfaces comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and aluminum powder. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution with a small but controlled and necessary amount of solute aluminum prior to adding aluminum powder to form the slurry. The bonding solution preferably also contains magnesium. The present invention overcomes the problem of bonding solutions which require environmentally disadvantageous chromates or molybdates to neutralize the bonding solution prior to formation of the slurry.