很明显，OCP 值从 0 d 的 -1.12 V/SCE 增加到 0.5 d 的 -1.04 V/SCE 并上升到 1 d 的 -0.98 V/SCE。对于 3-7 d 浸泡样品检测到微小变化 . 然后在 14 天后观察到 OCP 值略有增加。 很明显，浸泡后的所有 OCP 值都高于 0 d 时的值。 这种行为可能是指样品表面腐蚀产物的不断积累，这降低了 AP 中纯 Zn 的腐蚀敏感性。

It is obvious that the OCP value increases from −1.12 V/ SCE for 0 d to −1.04 V/SCE for 0.5 d and rise to −0.98 V/SCE for 1 d.Small variations are detected for the 3–7 d immersion samples. Then a slight increase of OCP value is observed after 14 d. It is obvious that all the OCP values after immersion are higher than that at 0 d. This behavior may refer to the constant buildup of corrosion products on sample surfaces, which decrease the corrosion susceptibility of pure Zn in the AP.