Current Situation of the Study on Zinc Plating Passivation Tier

Steel plate must have a passivating treatment after hot galvanizing,the manufacture was delayed by undesirable passivating results,which were caused by unreliable performance of passivator.This article summed up the current situation of study on zinc plating passivation tier at home and abroad.It expounds detailedly from coated metal,principle of becoming passivation tier,film tier structure and function.