inhibitor: Veawab, A.; Tontiwachwuthikul, P. Investigation of
Low-ToxicOrganic Corrosion Inhibitors for CO2 Separation Process
UsingAqueous MEA Solvent.Ind. Eng. Chem. Res. 2001, 40,
47714777.need for CCS:Cummings, Arthur L., Scott W. Waite, and
Dennis K. Nelsen. "Corrosion and corrosion enhancers in amine
systems." Brimstone Sulfur Conference. Banff, AB, Canada.
2005.thematerials selection the design life is
particularlyimportant as it is used in combination with
corrosionrates to specify the corrosion allowance (e.g. 0.1 mm/y in
30 years is 3 mm corrosion allowance)carbon steel avelocity limit
guideline to prevent erosion corrosion in lean and rich amine
service is 1.8 m/sIndustry consensus guidelines are provided in API
RP 9456. ASCC is most pronounced in leanamine. Solvent ranking by
decreased susceptibility:MEA, DIPA, DEA, MDEA, DGA,
sulfolanecontaining solvents. ASCC can be mitigated by a stress
relief heat treatment andPost WeldHeat Treatment (PWHT). A PWHT of
635 +/ 15C10for one hour per 25 mm of thickness (onehour minimum)
is considered an effective stress relieving heat treatment to
prevent alkalinecracking of C steel.Both the above are referrred
from: API Recommended Practice 945: Avoiding Environmental Cracking
in Amine Units, April 2008
