采用电化学电位阶跃技术研究了H2S/CO2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=50 mV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，CO2提高吸收态氢对itotal的贡献，促进了氢吸收。
Chronoamperometry(CA) was used to study the melt interface reaction in H2S/CO2 coexistence environment. The mathematic model for interface reaction of the process has been carried out. The action of adsorption, desorption and hydrogen absorption for interface reaction were analyzed using this model. The results demonstrated that when η=50 mV, the process of hydrogen adsorption is dominant and control whole interface reaction; when η>50 mV,the desorption process of pre-adsorption substance control whole interface reaction. CO2 increases contribution of absorption-feature hydrogen to the itotal，so promotes hydrogen absorption in all experimental η condition.
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