Bubbles released at low current density grow, coalesce to a big one and then set free at the anodic surface.The diameter of released bubble decreases with the increasing of current density.

• 对低电流密度下气泡的生长过程观察发现， 气泡先在阳极表面长大， 再汇聚成一个或几个大气泡从阳极底部析出， 析出前的气泡平均直径随电流密度的增加而减小。