酒钢连续热镀锌机组自投产以来，表面麻点缺陷一直是影响镀锌产品质量的主要缺陷，它不但影响了热镀锌产品的外观，而且会使热镀锌产品的抗腐蚀性降低，从而影响镀锌产品的使用性能。通过对酒钢热镀锌钢板表面的麻点缺陷进行的扫描电子显微镜分析，及对入口活套和出口活套辊面粗糙度的测量分析，得出镀锌板表面麻点缺陷产生的主要原因是由于辊面粗糙度过大造成镀层表面硌伤，从而产生凹坑麻点缺陷，同时镀后产生的锌粉（粒）及附着的灰尘也会产生麻点缺陷。经过对辊面进行磨光处理及定期清理后，有效减轻了镀锌板表面麻点缺陷。
The pock flaws on the surface of the hot-dip galvanized coating will not only affect its appearance, but also the employing properties of the hot-dip zinc-coated sheets and coils, the pock flaws were observed and analyzed by SEM and energy spectroscopy; meanwhile the surface roughness of the entry loop rolls and delivery loop rolls were measured. Results indicated that the pock flaws were caused by the excessive surface roughness of the rolls which injured the coating. And the zinc particle will cause the pock flaws. These defects could be decreased by polishing and cleaning the rolls surface.
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