Corrosion testing and evaluation of gas oil desulfurization reactor structure material in the presence of fatty acids

Z. Lukács, F. Molnár, I. Kovács, I. Wáhl Horváth, J. Hancsók, T. Kristóf

Research output: Contribution to journalArticle

Abstract

High pressure, high temperature corrosion of 1.4550 stainless steel alloy was studied under hydrodesulfurization conditions of gas oil and modeling the co-processing of waste fatty acid containing gas oil. Considerable amount of preliminary experiments were conducted to determine the optimal experimental setup. After a 1000-h exposure time (time on stream) and a standardized cleaning procedure, weight loss measurements, microscopic and surface analytical tests (SEM/EDX/XRD) were carried out. The average corrosion rate of the investigated alloy remained well below 0.1 mm/year, however, some protective film breakdown and localized corrosion phenomena were observed on the test specimens. The surface analytical results indicated the presence of a multilayer structure with a looser iron sulfide outer layer and a more compact chromium sulfide inner layer, both of them being susceptible for film breakdown.

Original languageEnglish
Article number104221
JournalEngineering Failure Analysis
Volume107
DOIs
Publication statusPublished - Jan 2020

Keywords

  • Corrosion
  • Fatty acid
  • H2S
  • Petrochemical
  • Structural steel

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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