摘要
采用电位阶跃技术研究在H2S和CO2共存的近中性溶液中套管钢/溶液界面和反应过程。应用数学模型分析界面反应中氢吸附过程、负离子脱附过程和氢吸收过程的变化规律。当阶跃电位为50mV,界面反应由氢吸附过程控制,当阶跃电位超过50mV,界面反应由负离子脱附过程控制。研究显示,在含50%H2S(pH=5.9)环境中,加入CO2提高了界面负离子脱附、氢吸附和氢吸收反应速率。
Electrochemical transient technique was used to study the processes in tubular steel solution interface in the neutral solution containing H2 S and CO2. The processes consisted of anion desorption, hydrogen adsorption and hydrogen absorption were analysized using steel-solution interface models. The process in the metal solution interface was controlled by hydrogen adsorption at the potential step of --50 mV, however, by anion desorption at the potential step higher than --50 mV in the solution containing H2S and CO2. The results show that adding CO2 increased anion desorption rate, and enhanced hydrogen adsorbing and absorbing in high H2 S containing solution.
出处
《腐蚀与防护》
CAS
北大核心
2013年第1期18-21,共4页
Corrosion & Protection
基金
重庆自然科学基金(cstc2012jjA50022)
重庆校内科研基金(CK2010B25
CK2011Z05)
关键词
套管钢
H2S
CO2
电位阶跃
脱附
氢吸附
氢吸收
tubular steel
hydrogen sulfide
carbon dioxide
potential step
anion desorption
hydrogen adsorption
hydrogen absorption