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采用电化学电位阶跃技术研究了H_2S/CO_2共存溶液中钢界面反应过程,提出了界面反应过程的模型,并建立了相应的数学描述。运用数学模型分析了界面物质吸附、脱附以及氢吸收的反应规律,得出:当η=50mV阶跃时,氢吸附过程控制整个界面反应;η>50 mV阶跃时,预吸附物脱附过程在整个阶跃期间控制整个界面反应,在各实验η阶跃条件下,CO_2提高吸收态氢对i_(total)的贡献,促进了氢吸收。
The electrochemical reaction step was used to study the interfacial reaction in the H 2 S / CO 2 coexisting solution. A model of interfacial reaction was proposed and the corresponding mathematical description was established. The mathematical model was used to analyze the reaction rules of adsorption, desorption and hydrogen absorption of the interfacial material. It was found that the hydrogen adsorption process controlled the entire interface reaction when η = 50mV step, and desorbed The process controls the entire interface reaction during the whole step, and under the experimental conditions of η step, CO 2 increases the contribution of absorbed hydrogen to i_t and promotes hydrogen absorption.