METHOD OF SURFACE TREATMENT FOR MAGNESIUM AND/OR MAGNESIUM ALLOY, AND MAGNESIUM AND/OR MAGNESIUM ALLOY PRODUCT

• Main Authors: YAMASOE, KATSUYOSHI, MAESHIMA, NAOFUMI, YASUHARA, KIYOTADA, FUTSUHARA, MASANOBU
• Format: Patent
• Language: English; French; Japanese
• Published: 30.05.2003
• Edition: 7
• Subjects: 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; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

A method of surface treatment for magnesium and or a magnesium alloy, which comprises treating magnesium and or the magnesium alloy with an aqueous chemical treatment solution (A) containing 0.001 to 10 mass % of a carbonate salt compound. The method of surface treatment combines the use of a treating agent which is substantially free of a substance harmful to the environment or a human body and a low electric resistance of the resulting coating film. A method of surface treatment for magnesium and/or a magnesium alloy, which comprises treating magnesium and/or the magnesium alloy with an aqueous chemical treatment solution A containing 0.001 to 10 mass % of a carbonate salt compound. The method of surface treatment combines the use of a treating agent which is substantially free of a substance harmful to the environment or a human body and a low electric resistance of the resulting coating film. La présente invention se rapporte à un procédé de traitement de surface pour magnésium et/ou alliage de magnésium, qui consiste à traiter le magnésium et/ou l'alliage de magnésium avec une solution de traitement chimique aqueuse (A) contenant 0,001 à 10 % en masse d'un composé à base de carbonate. Ce procédé de traitement de surface combine l'utilisation d'un agent de traitement qui ne contient sensiblement aucune substance nuisible pour l'environnement ou pour le corps humain ainsi qu'une faible résistance électrique du film de revêtement produit.