Method of manufacturing a welded can body.

摘要

A method of manufacturing a welded can body from tinplate (6) or a tin-iron alloy plated steel sheet (6') comprises overlapping the opposite marginal portions (6d, 6'd) of a blank of the tinplate (6) or the tiniron plated steel (6') sheet to form a can body preform having an overlapping portion, applying at least to the cut edges (8) of the marginal portions (7) of the blank a fluxing agent (11) promoting wetting of steel with molten tin, and electrical resistance seam welding the overlapping portion in a nonoxidizing atmosphere by employing a pair of wire electrodes (3a, 3b) each covered by a layer of metallic tin (18) on the surface thereof facing the overlapping portion. The welded portion has improved corrosion resistance, as an extruded weld portion and a remaining cut edge surface portion thereof are covered with tin transferred from the surfaces of the wire electrodes and/or the tinplate (6) during the welding operation.