Study on the Effect of Different Deposition States of Elemental Sulfur on the Corrosion of L290 Steel

Yan Zhi

Abstract: Through wet gas pipeline corrosion simulation experiments, with SEM testing and EDS analysis, to study the effect of different deposition states of elemental sulfur on the corrosion of L290 steel. The results show that the metal below the deposited sulfur area is subject to serious local corrosion, and the increase in the deposited sulfur content will accelerate the corrosion rate; surrounded by a pool of liquid will further promote the corrosion rate, the metal immersed in the pool of liquid is uniform corrosion characteristics; sporadic sulfur particles attached to the metal surface will cause serious pitting corrosion. The corrosion product film is loose, easy to crack, corrosion mechanism for the catalytic reaction, the main components of the product is FeS, FeS2.

Keywords: elemental sulfur; deposition state; corrosion rate