Under stratified flow and dewing conditions, internal corrosion can occur at the top of horizontal
pipelines where continuous injection of corrosion inhibitors does not have a mitigating effect. This
research work presents an experimental study of the influence of the presence of H2S (up to 0.13 bars) and acetic acid (up to 1000 ppm) on the more standard CO2 Top of the Line Corrosion. A
comprehensive analysis on the effect of these parameters on the type of corrosion product film formed
at the top of the line is performed.
Key Words: Top of the line corrosion, H2S, CO2, acetic acid