关于自腐蚀电位判断自腐蚀电流变化? 上面那位朋友说的有道理的,你要判断反应步骤是否受扩散控制需要根据你实际实验结果来分析。若腐蚀电位下降,腐蚀电流上升,可以说明阳极反应得到加强,你要判断是否是氧扩散控制可以通过极化曲线去看,若阴极出现 ... 麻烦你帮我看下我写的解释对不对,由于之前我写关于自腐蚀电位的解释不对,被审稿人说了,现在审稿人让我修改,麻烦帮我审阅下我对自腐蚀电位解释(其中:自腐蚀电位下降,自腐蚀电流增大;自腐蚀电位升高,自腐蚀电流减小。这一结论我没放在这段话里,因为前文我已经提到过)我修改的如下:to further confirm the proposed mechanism, the obtained ecorr(自腐蚀电位) was used. if anodic reaction is inhibited by corrosion products, the ecorr shifts in positive direction and corrosion rate decreases. if cathodic reaction is enhanced by a decrease in the thickness of electrolyte layer, the ecorr shifts in positive direction and corrosion rate increases. as shown in fig. 5, the ecorr decreased in the first 24 h with exposure time and increased at 72 h for 75% rh and 85% rh. in the initial stage of corrosion, the amount of corrosion product on the electrode surface was small, so the diffusion of the metal ion (anodic process) was relatively easy, thus corrosion process was controlled by the cathodic oxygen reduction process and more oh- was probably concentrated on the metal surface, causing the ecorr to decrease. but at the later stage, the anodic process was inhibited because the diffusion of the corrosion product and metal ions became more difficult in the thinner electrolyte layers and the more metal ions were concentrated on the metal surface, causing the ecorr to increase. thus the corrosion rate was determined by anodic process at the later stage for 75% rh and 85% rh. but for 97% rh, the ecorr was inclined to decrease at the whole stage, which was attributed to the enhancement of the anodic reaction and the corrosion rate was dominated by the oxygen diffusion at the whole stage, as for the relative thick electrolyte layer, the process for the diffusion of the corrosion products and the metal ions from the electrode was relatively easy, thus the corrosion process was still controlled by oxygen diffusion process, 查看更多