Finer, more uniform and denser zinc crystals were attained by secondary zinc coating with better covering capacity.
二次浸锌得到的锌晶粒比一次浸锌更细小、均匀和致密，对基体覆盖能力好。
2
The casting pure zinc is often chosen as sacrifice anode covering on the surface of steel-foot to prevent the corrosion.
选择浇铸纯锌做牺牲阳极覆盖在钢脚表面的方法，能够有效地防止钢脚的腐蚀。
3
The separation and enrichment of zinc as a necessary pretreatment in its determination covering recent years, pertaining especially to the methods of liquid membrane separation, are reviewed.