GALVANIZED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AFTER WORKING AND PRODUCTION METHOD THEREFOR

• Main Authors: TANIDA KOJI, TATSUMI KIYOMASA, BANDO SEIJI
• Format: Patent
• Language: English
• Published: 31.07.2002
• Edition: 7
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; 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; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a lubrication treated steel sheet having high workability and high corrosion resistance which can not be obtained in a GA steel sheet and good surface quality free from rugged defects which can not be obtained in a GI steel sheet compatibly, and further having corrosion resistance after working and adhesion, and to provide a production method therefor. SOLUTION: A galvanizing coating film provided on the steel sheet contains, by mass, 0.20 to 1.0% Al and 0.5 to 6.0% Fe. The surface thereof is provided with a chromate film, and the surface of the film is provided with a silica- containing lubricating organic resin film.