SURFACE TREATMENT OF ZINC PLATED STEEL PLATE

PURPOSE:To improve the corrosion resistance in the worked part of a zinc plated steel plate with a simple stage by subjecting said steel plate to a chromate treatment contg. the product of reduction of chromic acid and coating the paint curable by active energy rays on the top layer thereof. CONSTIT...

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Hauptverfasser:	TAMURA TETSUPEI, IWASAKI KIYOTOSHI, WADA KOUICHI, TERASAKI NORIO, SHINDOU YOSHIO, ANDOU NARUMI, SAIKI TAKASHI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR ARTIFICIAL STONE CEMENTS CERAMICS 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 MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIME, MAGNESIA METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS REFRACTORIES SLAG SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the corrosion resistance in the worked part of a zinc plated steel plate with a simple stage by subjecting said steel plate to a chromate treatment contg. the product of reduction of chromic acid and coating the paint curable by active energy rays on the top layer thereof. CONSTITUTION:An aq. chromic acid soln. consisting of the compsn. of mixing ratios between chromic acid and the product of reduction of chromic acid ranging 1:0.5-1:0.8 by weight in terms of CrO3 respectively is coated on a steel plate plated with zinc or a zinc alloy, whereby a chromate film of 10-200mg/m stuck amount in total chromium is formed. Paint to be cured by active energy rays such as accelerated electron rays, ionizable radiations or the like is coated on the top layer thereof to 0.5-10mu film thicknesses. Silica sol is added at a weight ratio of silica sol (in terms of SiO2) based on the total weight (in terms of CrO3) of the chromic acid and the product of reduction of chromic acid ranging 1:0.3-1:8.0 to said aq. chromic acid soln., whereby the irregularity in sticking of chromate is prevented.