CONTINUOUS HOT DIPPING METHOD

摘要

PURPOSE:To enable light-gauge plating under high-speed operation and to prevent the generation of noise and splash in the stage of subjecting a reduction- annealed metallic strip to continuous hot dipping without oxidizing the same by using wiping by a molten salt and jet in wiping and adjusting the molten metal sticking on the metallic strip. CONSTITUTION:A reduction-annealed metallic strip 3 is conducted continuously to a plating bath 2 without oxidizing the same, and is pulled upward perpendicularly from the bath surface via a sink roll 7. The molten plating metal 4 sticking on the strip 3 is preliminarily wiped by the resistance and surface tension at the boundary of the molten salt 5 in a salt bath furnace 9 and thereafter the molten salt 5 is further ejected to the surface of the strip 3 from a nozzle 13 installed opposite to the strip 3 to wipe the excess molten plating metal. The upper part of the furnace 9 has a passage port for the strip 3 and the base is opened. The bottom part thereof is dipped in the bath 2 and the salt 5 put afloat therein is adjusted in thickness T by the salt 5 in a salt bath furnace 10 heated to an adequate temp. and supplied therein together with said salt. The salt 5 is sent to the nozzle 13 under pressure by a pump P2 and a pipe 12.