Q:
What does Gaseous "Corrosion" of a Metal Mean?





A:

Gaseous "corrosion" of a metal can include sulfidation
and carburization as well as oxidation.


  • Carburization: CO, CO2, Ch4

  • Sulfidation: H2S, SO2


  • It can be visualized as a solid state electro-
    chemical process analogous to aqueous or liquid
    corrosion.

  • Industrial situations can involve complex mixtures
    of gases containing oxygen, sulfur, carbon, and hydrogen
    (water vapor or fuel combustion products).


    Industrial Examples Include:

  • Chemical

  • Petroleum

  • Coal Conversion

  • Gas Turbines (add chlorine in marine environment)

  • Steam Turbines (chlorine, again)