摘要
采用Devnathan-Stachurski双电解池法研究了在不同酸性气体、溶液pH及温度条件下X52管线钢的氢渗透行为。结果表明:在含不同酸性气体的溶液中,稳态渗氢电流密度由大到小的顺序依次为H2S、H2S/CO2、CO2,氢扩散系数基本不变;稳态渗氢电流密度随溶液pH的增大而减小,氢扩散系数基本不变;随着温度升高,稳态渗氢电流密度随之增大,可扩散氢浓度先减小后增大,氢扩散系数与温度符合Arrhenius方程。
The hydrogen permeation behavior of X52 pipeline steel was investigated under the conditions of different acidic gases, solution pH values and temperatures by using the classical Devnathan-Stachurski electrochemical permeation cell. The results show that the steady state hydrogen permeation current density in solutions with dissolved acid gases decreases in the order of H2S, H2 S/CO2 and CO2, but the hydrogen diffusion coefficient remains unchanged. With the increase of pH value, the hydrogen permeation current density increases first and then decreases, but the hydrogen diffusion coefficient is not clearly changed. When the temperature of solution rises, the hydrogen permeation current density increases and the diffusible hydrogen concentration exhibits a tendency of decrease followed by increase. The relationship between hydrogen diffusion coefficient and temperature conforms with the Arrhenius equation.
出处
《机械工程材料》
CAS
CSCD
北大核心
2015年第5期23-26,共4页
Materials For Mechanical Engineering
基金
油气藏地质及开发工程国家重点实验室(西南石油大学)资助项目(PLN1306)
关键词
氢渗透
氢扩散系数
可扩散氢浓度
hydrogen permeation
hydrogen diffusion coefficient~ diffusible hydrogen concentration
