1　前　言在连续热镀锌中 ,吹气工艺会产生“边部过镀锌”(以下简称ＥＯＣ) ,此时的带钢边部锌层厚度是中部的 1 .2～ 2倍。ＥＯＣ不仅造成卷取困难 ,而且还会使开卷平坦度不良 ,并在合金化退火处理时造成非合金化的边沿 ,即纯锌边。为了防止ＥＯＣ ,目前已采用了多种方法。一 1 Introduction In the continuous hot-dip galvanizing, the blowing process will produce “edge over galvanized” (hereinafter referred to as EOC), this time the strip edge of the zinc layer thickness is the middle of 1.2 to 2 times. EOC not only causes coiling difficulties, but also poor uncoiled flatness and non-alloying edges, ie pure zinc edges, during alloying annealing. To prevent EOC, a variety of methods have been adopted so far. one