ZINC-NICKEL PLATING METHOD

摘要

PURPOSE: A method for decreasing plating defects such as dent and arc spot during plating a steel sheet in a zinc-nickel plating bath by removing metal Ni sludge from the surface of deflector roll is provided. CONSTITUTION: The method is characterized in that a permanent magnet having a magnetic force of greater than 3MG·Oe is installed at the bottom of a zinc-nickel plating bath(12) or over flow line(6), wherein the permanent magnet is clad by a material that is non magnetic and non reactive with the zinc-nickel plating solution.