CHROMIUM-FREE CONVERSION COATING

PROBLEM TO BE SOLVED: To provide coatings and corrosion control on metals, and in particular a chromium-free conversion coating for aircraft applications.SOLUTION: A chromium-free conversion coating is prepared by addition of inorganic metallic salts and one or more silanes to dispersions of conduct...

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Bibliographische Detailangaben
Hauptverfasser:	ZUBILLAGA-ALCORTA OIHANA, NIEVES LAPENA-REY, IZAGIRRE-ETXEBERRIA USOA, SANTA COLOMA-MOZO PATRICIA, CANO-IRANZO FRANCISCO JESUS
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES 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 CORRECTING FLUIDS DIFFUSION TREATMENT OF METALLIC MATERIAL DYES FILLING PASTES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide coatings and corrosion control on metals, and in particular a chromium-free conversion coating for aircraft applications.SOLUTION: A chromium-free conversion coating is prepared by addition of inorganic metallic salts and one or more silanes to dispersions of conducting polymers, where the inorganic metallic salts are selected from at least one of Mo, Mg, Zr, Ti, Ce, Hf, Si, B, Co and Zn with a metallic salt concentration of 2.0-20 g/L and pH of 1-6.0, and then exposing them to alloys of aluminum or other metals. Advantageously, performance of the coating is comparable to that of conventional Cr-based methods for many aluminum alloys having particular significance in manufacture of aircraft.