金属的无源性：点缺陷模型中无源电流密度和势垒层厚度的电势阶跃瞬态
Passivity of Metals: Potential-Step Transients for Passive Current Density and Barrier Layer Thickness in the Point Defect Model
摘要：
在早期的预印本中，我们开发了点缺陷模型的变体，该变体纠正了其中一个缺陷反应中的缺陷，并且将原始点缺陷模型的反应3具体替换为变体的反应3prime。在这里，我们应用校正后的模型来寻找被动电流密度和势垒层厚度的时间演化。虽然功能形式与Macdonald及其同事先前报告的形式一致，但参数的组成却有显著差异。这解释了有缺陷的模型的实验成功。这种现象也表现在对涉及电流密度的时间导数的电流瞬变的诊断中。本理论将是有用的，正确的瞬态分析所造成的阳极或阴极方向从一个初始的稳定状态的电位切换。
英文摘要：
In an earlier pre-print we developed a variant of the point defect model that corrected a flaw in one of the defect reactions and to be specific reaction 3 of the original point defect model was replaced by reaction 3prime of the variant. Here we apply the corrected model to find the time evolution of the passive current density and the barrier layer thickness. Though the functional forms agree with the forms reported earlier by Macdonald and co-workers, the composition of the parameters differ significantly. This explains the experimental success of the flawed model. This semblance is also manifested in the diagnostics for the current transient involving the time-derivative of the current density. The present theory will be useful for the correct analysis of transients which result from switching the potential in the anodic or cathodic direction from an initial steady state.
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