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Sulfurous acid

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  • Sulfurous acid

    Sulfur acid (H2SO4) is formed in the combustion pressure. This can negatively affect for example the cylinder liner (cold corrosion).
    In addition to this, sulfurous acid (H2SO3) is also formed.

    I have trouble finding anything related to this, is it even present in the combustion? Is it as corrosive as the sulfuric acid?

    Does anyone have any inputs on this?

    Thanks!

  • #2
    filipsoderberg
    Yes, sulphurous acid (H2SO3) also forms, albeit to a limited extent and its a weak acid to actually perform damage to the parts but this sulphurous acid may be catalyzed with oxygen (present abundant inside combustion chamber) to form a stronger sulphuric acid (H2SO4) which will corrode the metal and also settles on the exposed surface in the form of microscopic droplets.

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