Purpose

This paper aims to study the effect of temperature on the process and kinetic parameters of the hydrogen evolution reaction of X80 under cathodic protection (CP) in 3.5% NaCl solution.

Design/methodology/approach

Potentiodynamic polarization combined with the hydrogen permeation test is used to analyze the hydrogen evolution reaction (HER) process and the rate-determining step for which is diagnosed through the electrochemical impedance spectrum method. Then, the influence of temperature on kinetic parameters of HER can be known from the results obtained by using the Iver-Pickering-Zamenzadeh model for data analysis.

Findings

The results show that the HER proceeds through Volmer–Tafel route with the Volmer reaction acting as the rate-controlling step; Increasing temperature gives a higher activity of the HER on X80, it also accelerates the hydrogen desorption and diffusion of hydrogen into the metal.

Originality/value

There exist few studies on the topic of how temperature affects the HER process. It is imperative to conduct a relevant study to give some instruction in cathodic protection system design and this paper fulfills this need.

中文翻译：

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温度对CP下X80析氢反应过程及动力学参数的影响

目的

本文旨在研究温度对X80在阴极保护(CP)下在3.5% NaCl溶液中析氢反应过程和动力学参数的影响。

设计/方法/方法

动电位极化结合氢渗透试验用于分析析氢反应（HER）过程，并通过电化学阻抗谱法诊断析氢反应的决速步骤。然后，通过使用Iver-Pickering-Zamenzadeh模型进行数据分析得到的结果，可以知道温度对HER动力学参数的影响。

发现

结果表明，HER通过Volmer-Tafel路线进行，Volmer反应作为速率控制步骤；升高温度使 X80 上的 HER 活性更高，它还加速了氢解吸和氢向金属中的扩散。

原创性/价值

关于温度如何影响 HER 过程的研究很少。开展相关研究对阴极保护系统设计有一定指导意义，本文正是满足了这一需要。