LABORATORY STUDIES OF THE INFLUENCE OF WORKING PARAMETERS OF HYDROGEN SULFIDE ENVIRONMENT ON PIPE STEEL CORROSION RATE

Abstract

The influence of the composition of the medium, its temperature and pressure on the corrosion rate of the P-105 and 20 tubes steels and, for comparison, 20 sheet steel, was investigated. It is shown that in intensely stirred chloride medium with H₂S and CO₂ admixtures, the corrosion rate of steels in the liquid phase is higher than in gas-vapor: at 25°C – twice, at 60°С - 3 times, and at 95°С - 4 times. It is established that the most corrosion-resistant are 20 sheet and pipe steels and the least corrosion-resistant - P-105 steel. It is shown that 20 steel is susceptible to surface blistering, unlike P-105 steel, which is resistant to this type of destruction