Effect of SO2 concentration as an impurity on carbon steel corrosion under subcritical CO2 environment

M. G.R. Mahlobo, K. Premlall, P. A. Olubambi

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


Carbon dioxide (CO2) is considered to be easier to transport over moderate distances when turned into supercritical state (dense phase) than at any other state. Because of this reason, the transportation of CO2 during carbon capture and storage requires CO2 to be at its supercritical state. CO2 temperature profile from different regions causes CO2 to deviate between supercritical and subcritical state (gas/liquid phase). In this study the influence of sulphur dioxide (SO2) on the corrosion of carbon steel was evaluated under different SO2 concentrations (0.5, 1.5 and 5%) in combination with subcritical CO2. Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Energy-Dispersive X-ray Spectroscopy (EDS) were used to characterize the CO2 corrosion product layer formed on the carbon steel surface. The weight loss results showed that corrosion rate increased with SO2 concentration with corrosion rate up to 7.45 mm/year while at 0% SO2 the corrosion rate was 0.067 mm/year.

Original languageEnglish
Article number012031
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 21 Dec 2017
Event2017 4th International Conference on Mechanical, Materials and Manufacturing, ICMMM 2017 - Atlanta, United States
Duration: 25 Oct 201727 Oct 2017

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering


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