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首页> 外文会议>NACE International CORROSION/2005 Conference >RAPID DETERMINATION OF TAFEL SLOPES BY AN INTEGRAL METHOD OF COULOSTATICALLY INDUCED TRANSIENTS
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RAPID DETERMINATION OF TAFEL SLOPES BY AN INTEGRAL METHOD OF COULOSTATICALLY INDUCED TRANSIENTS

机译：瞬态瞬变积分法快速测定塔法边坡。

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A new numerical method, based on an integral formulation, for analyzing the coulostatically-induced transients is developed. This method can compute the Tafel slopes ba and bc and, on the grounds of their knowledge, evaluate the corrosion current,Ic. The examination of some numerical examples has shown the effectiveness and reliability of this new approach. The experimental application concerns the behavior of Q235 steel in natural seawater. Comparing the analysis of coulostatically-induced transient curves, CSPI (coulostatic strong polarization integral) method with the conventional method showed that the CSPI method requires a less rigorous restriction on the sampling of response potential, and therefore, it is considered an improved method. A good agreement was found between anodic and cathodic Tafel slopes obtained by traditional Tafel analysis and those obtained by new CSPI method. Furthermore, the cathodic Tafel slopes obtained by the CSPI method are closer to the theoretical values associated with the oxygen reduction reaction. Consequently, it is feasible to use the coulostatic method to determine Tafel slopes in systems where the effect of concentration polarization needs to be minimized.
机译：提出了一种基于积分公式的新数值方法，用于分析由库洛静力学引起的瞬变。该方法可以计算出塔菲尔斜率ba和bc，并根据其知识来评估腐蚀电流Ic。对一些数值示例的研究表明了这种新方法的有效性和可靠性。实验应用涉及Q235钢在天然海水中的行为。通过比较静磁瞬态曲线的分析，CSPI（静磁强极化积分）方法与常规方法相比，CSPI方法对响应电位的采样要求不严格，因此被认为是一种改进的方法。通过传统的Tafel分析获得的阳极和阴极Tafel斜率与通过新的CSPI方法获得的阳极和阴极Tafel斜率之间发现了很好的一致性。此外，通过CSPI方法获得的阴极Tafel斜率更接近于与氧还原反应相关的理论值。因此，在需要最小化浓度极化效应的系统中，使用库洛静压法确定塔菲尔斜率是可行的。

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