STOCK FOR WELDED CAN EXCELLENT IN HIGH SPEED SEAM WELDABILITY, PITTING CORROSION RESISTANCE, HEAT RESISTANCE AND ADHESION OF COATING MATERIAL

• Main Authors: KATAYAMA TOSHINORI, HIRANO SHIGERU, ICHIKAWA TAKASHI, OGA TOMOYA
• Format: Patent
• Language: English
• Published: 26.04.1994
• Edition: 5
• Subjects: APPARATUS THEREFOR; 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; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

PURPOSE:To improve the high speed seam weldability, pitting corrosion resistance, adhesion of coating material or the like in the stock for a welded can, on the surface of a steel sheet applied with a prescribed amt. of Ni alloy plated layer, by furthermore forming an Sn plated layer and a chromate film under prescribed conditions. CONSTITUTION:The surface of a steel sheet is plated with an Ni-Fe alloy layer or an Ni-P alloy to form a plated layer of 2 to 150mg/m . Its surface is coated with an Sn plated layer, and in which Sn plating grains having 0.2 to 12mu grain size are scattered in a ratio of 10 to 2800mg/m . Moreover, a chromate film of 1 to 50mg/m in terms of chromium) is formed thereon. This stock for a welded can is excellent in high speed seam weldability, pitting corrosion resistance, heat resistance and the adhesion of coating material.