Electrochemical Transient Technique of Processes Occurring in Tubular Steel-Neutral Solution Interface in H₂S and CO₂ Containing Environment

Electrochemical transient technique was used to study the processes in tubular steel-solution interface in the neutral solution containing H2S 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 H2S containing solution.