The step response function of anodic reaction induced by rapid straining on passive metals
The step response function of anodic reaction induced by rapid straining on passive metals
复制标题
钝化金属快速应变诱发阳极反应的阶跃响应函数
DOI：
10.1016/0010-938x(90)90174-4
复制
发表时间：
1990
影响因子：
8.3
通讯作者：
T. Shibata
中科院分区：
文献类型：
--
作者：
S. Fujimoto;T. Shibata
本文提出了一种利用快速应变电极技术获得的数字化实验数据进行反卷积的数值方法，以确定钝化金属和合金新生成表面上的真实阳极过程。由于新产生的表面的产生需要有限的时间，应变电极行为的初始阶段包括活性溶解和再钝化的影响。因此，所观察到的电流随时间的变化被表示为裸表面产生的阶跃函数和电流的响应函数的卷积。因此，阶跃响应函数，即裸表面上的真实的阳极电流，通过去卷积计算来确定，而无需任何动力学方程的假设。通过该方法分析了几个典型实例，说明了合金成分对Fe~（18）Cr~（18）Ni合金初始溶解的影响。
A numerical method using a deconvolution of the digitized experimental data obtained from a rapid straining electrode technique has been proposed, in order to decide the true anodic process on the newly created surface of passive metals and alloys. Since generation of a newly created surface needs a small limited time, the initial stage of the straining electrode behavior includes the influence of both active dissolution and repassivation. Thus, the observed change in current with time is expressed as a convolution of the step function of bare surface generation and the response function of current. Therefore, the step response function, namely, the real anodic current on the bare surface, was determined with de-convolution calculation without any assumption of a kinetic equation. Some typical examples analyzed by the method were presented for showing the effect of alloy composition on initial dissolution of Fe18CrNi alloys.