DESTRUCTION OF LOW-CARBON-STEEL PIPELINES  IN ENVIRONMENTS CONTAINING HYDROGEN SULFIDE

Analysis of the material of the petrochemical industry objects due to their long operation is extremely important to assess their safety. In this paper, we analyzed the effect of long-term operation of petrochemical equipment of unalloyed and low-alloyed steel at climatic temperatures in technological environments containing hydrogen sulfide on the degradation of the structure of this equipment. We have carried out calculations of carbon diffusion to the surface during decarburization, indicating a clear possibility of diffusion fluxes of interstitial elements occurring under climatic temperatures and long exposures. The paper presents data on the structure and technological precipitation of equipment components after long-term operation (30 years or more) in oil refineries. We have carried out calculations of carbon diffusion to the surface during decarburization, indicating a clear possibility of diffusion fluxes of interstitial elements occurring under climatic temperatures and long exposures. The reason for decarburization during operation in an environment containing hydrogen sulfide, in this case, should not be attributed to hydrogen corrosion, but to an oxide layer forming due to the presence of condensate and water vapor.