Sodium sulfate is a useful model compound of those substances which cause hot corrosion of gas turbine parts. Possible mechanisms of formation of this compound from sodium chloride and sulfur oxides from fuel combustion are considered for conditions prevailing in the gas turbine engine. Thermodynamic equilibria are computed when the fuel contains sulfur, and the air sodium chloride. Published data on the kinetics of the reaction SO2 + 1/2O2 = SO3 show this reaction is too slow to reach equilibrium under the conditions prevailing in a gas turbine. Published data on the liquid-vapor equilibria of NaCl and Na2SO4 are reviewed; those on Na2SO4 are probably in error due to dissociation of the vapor at high temperatures. Various possibilities of the equilibrium between Na2SO4 vapor and its dissociation products in the presence of O2 and H2O under engine conditions are compared. From these considerations, it appears condensation of Na2SO4 to a liquid or a solid could occur over a relatively narrow range of engine conditions.

  • Corporate Authors:

    National Association of Corrosion Engineers

    2400 WestLoop South
    Houston, TX  United States  77027
  • Authors:
    • Tschinkel, J G
  • Publication Date: 1972-5

Media Info

  • Pagination: p. 161-169
  • Serial:
    • Volume: 28N5

Subject/Index Terms

Filing Info

  • Accession Number: 00034903
  • Record Type: Publication
  • Source Agency: United States Merchant Marine Academy
  • Files: TRIS
  • Created Date: Oct 27 1972 12:00AM