SURFACE TREATMENT METHOD OF MAGNESIUM AND MAGNESIUM ALLOY FOR IMPARTING BRIGHTNESS/DECORATING PROPERTY, HIGH CORROSION RESISTANCE AND FUNCTIONALITY

• Main Authors: ITODA KOJI, OKADA MASAYUKI
• Format: Patent
• Language: English
• Published: 14.04.2011
• Subjects: APPARATUS THEREFOR; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; 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; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

PROBLEM TO BE SOLVED: To provide a systematic surface treatment method of magnesium and a magnesium alloy, by which it is possible to impart metallic and bright decorating properties, excellent coating film adhesiveness, high corrosion resistance and functionality to a molded casing and component, made of magnesium or a magnesium alloy. SOLUTION: The surface treatment method of magnesium and a magnesium alloy is characterized by treating a molded magnesium and magnesium alloy product through a combined process indispensably including a combination of four base processes comprising a degreasing treatment, a chemical polishing treatment, a chemical conversion treatment and electrodeposition coating, wherein the compositions of treating solutions are predetermined and/or management conditions and treatment operation conditions are predetermined. COPYRIGHT: (C)2011,JPO&INPIT