Evaluation of the corrosion resistance of SA-543 and X65 steels in emulsions containing H2S and CO2 using a novel emulsion flow loop

• The corrosion resistance (RP) of SA-543 and X65 steels was investigated.
• A novel emulsion flow loop was designed and constructed to perform the experiments.
• The RP of SA-543 steel is better than X65 steel in emulsion containing H2S and CO2.
• The RP at the developing flow region was less than at the fully developed region.
• The RP increased with increasing oil concentration, velocity, and temperature.

A novel emulsion flow loop was constructed to investigate the corrosion resistance (RP) of SA-543 and X65 steels in oil-in-water emulsions containing H2S and CO2. Results show that RP of SA-543 steel is significantly better than that of X65 steel. The RP, which increases with increasing oil concentration, velocity, and temperature, is lower in the developing flow region when compared to that in the fully developed region.