一、前言 1984年11月28日,连续热镀锌带钢出现批量连续性、无规则的露钢和上下表面锌层附着力不合的缺陷。29日缺陷加重,有的带钢上下表面遍布点状、针状和块状的露钢,镀后呈麻点面,锌花细小且不均匀,光泽差。对这些带钢取样,进行常规的机械咬合和球冲试验,均发生锌层大面积脱落而被迫停 I. Introduction November 28, 1984, the continuous hot-dip galvanized steel batch continuity, no rules of the exposed steel and the upper and lower surface zinc layer adhesion defects. On the 29th, the defects were aggravated. Some of the upper and lower surfaces of the strip were covered with spot-shaped, needle-shaped and massive dew-shaped steel. After plating, they appeared as a pockmarked surface with small and uneven zinc flowers and poor gloss. Sampling of these strip, the conventional mechanical bite and ball-punch test, occurred in a large area of ​​zinc layer off and was forced to stop