The influence of nanosecond laser cleaning created surface textures on hot-dip galvanizing coating quality of industrial HSLA steel plate has been investigated in this work. The results show that the zinc coating of the sample with laser cleaning pretreatment is more uniform, bright and no-defect as compared to the traditional pickling process treated sample. With laser cleaning created surface textures, the ζ phase of the zinc-iron alloy layer is easy to form and grow in the protrusions on the base surface, and the δ phase is easy to form in the depressions. When the coating thickness is approximately the same, the special phase structure of the zinc coating on the surface of the laser cleaned sample makes the cracks preferentially expand from the coating depression to the coating surface, reducing the shedding of the coating, and improving the coating resistance to pulverization.

本工作研究了纳秒激光清洗产生的表面纹理对工业 HSLA 钢板热浸镀锌涂层质量的影响。结果表明，与传统酸洗工艺处理的样品相比，经过激光清洗预处理的样品锌层更均匀、光亮、无缺陷。激光清洗产生的表面织构，锌铁合金层的ζ相容易在基体表面的凸起处形成和生长，δ相容易在凹陷处形成。当镀层厚度大致相同时，激光清洗样品表面锌镀层的特殊相结构使裂纹优先从镀层凹陷处向镀层表面扩展，减少了镀层的脱落，