| 摘要 |
PURPOSE:To rapidly feed Zn ions to a galvanizing soln. at a low cost during galvanizing with an insoluble anode by adding an alloy of Zn with Cr, Fe, Cd, Co, Ni, Mo or Sn to the galvanizing soln. CONSTITUTION:During galvanizing with an insoluble anode, Zn ions are fed to a galvanizing soln. having a lowered concn. of Zn ions by dissolving metallic Zn in the soln. At this time, a Zn alloy obtd. by adding one or more among Cr, Fe, Cd, Co, Ni, Mo and Sn as elements having a higher standard potential than Zn to Zn by an amount within the range from the amount of such elements entering as inevitable impurities to the solubility limit is used as the Zn ion feeding source. Thus, the velocity of dissolution of metallic Zn is increased, so Zn ions are rapidly supplied to the galvanizing soln. to balance the concn. of Zn ions.
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