跪求各位大牛帮忙分析一下审稿意见 (动电位极化曲线的分析)？论文内容是不同合金成分的镁合金的组织和腐蚀性能分析，使用了动电位极化曲线和横电流极化曲线表征电化学性能，收到如下的意见，因为小弟方向是镁合金组织与结构，对电化学理解不深，请问各位大牛，文章应如何修改。The main referee’s critical comments were related to determining the corrosion rate of alloys. The authors indicated that fitting and measuring the potentiodynamic polarization curves and Corrview as a fitting tool were used. Evidently, the experimental polarization curves, which were presented in the digital form, were used for determining icorr, Ecorr, ba and bc. If so, the question arises: whether the total polarization curves (in the potential range to -2.5 V for the cathodic curve and to -0.8 V for the anodic curve) or only some portions of polarization curves were used? This is important. (We study the applicability of electrochemical principles, which form the basis for determining corrosion current and other corrosion parameters, and know many restrictions arising thereby). If the IR drop was not compensated during the polarization curve measurements, considerable errors in the polarization curves and, consequently, in icorr could appear. This is especially true at very high current densities used in the work. The referee’s question about taking into account the IR drop remained unanswered. Then, judging from the micrographs presented in the reply, in the case under consideration, the corrosion is local. The commercial computational programs, as a rule, are appropriate for estimating only general (uniform) corrosion. As it was mentioned in the first Referee’s Report, very high cathodic Tafel slopes (0.589; 0.474 V/decade) are doubtful. They can be caused by the effect of concentration polarization, when the cathodic reaction rate is limited by the diffusion of cathodic depolarizer. Judging from the results listed in Table 2, Corrview ignores this factor. What is the basis for the conclusion: “As seen in Fig. 4, the passivation can be observed in the polarization curves of MHG4”? The anodic polarization curve for this alloy has a Tafel portion with a slope of 0.071 V/decade and no passivation is observed.查看更多3个回答 . 5人已关注
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