AdvancePipeliner

Transferring to CMS

Corrosion Determination

The principal method of sweet corrosion assessment in the pipelines is as follows [1]:

Corrosion Rates

The not corrected corrosion rate in pipelines containing sweet hydrocarbon can be calculated using the following equation:

Where,

?             =    corrosion rate (mm/yr)

t             =    temperature in ºC.

FCO₂ =    fugacity of CO₂ in bar.

=     partial pressure of CO₂ (in bar) x fugacity coefficient

fugacity coefficient     =     10 ^{(0.0031 - 1.4 / (t + 273) x total pressure)}

The following factors have been derived to adjust the corrosion rates determined from above equation, by de Waard & Smith [2], dependent upon the process stream constituents.