Dear Sirs, We have faced intermittent severe corrosion in Amine stripper overhead condensers. The acid gas + condensate from the stripper top (at approx 110 C) goes to an airfin cooler & then to a condenser (shell-tube type). Fluid is on the shell side. The condenser has 70-30 Cu-Ni tubes and CS shell. The fluid enters the condenser at approx 65 C & leaves at around 30-35 C. The condenser, leaked thru' shell and also tubes after 5yrs of service. The leakage took place near top inlet nozzle (approx 6-8" away from the nozzle) at at approx 11 O'clock to 1 O'clock position. There was also deposits on the tubes. Tubes also failed. Similar corrosion took place two more times, almost at 6 month intervals. At present everything is normal. No leakage / apparent corrosion in the upstream airfin cooler / piping noticed so far. Only relevant information that could be gathered was unexpected loss of amine was noticed in that period by Prodn group. My guess is amine degradation & carryover to the condenser is a possibility. Splashing of degraded rich amine might have contributed some way to the corrosion. Any information / opinion from the group will be highly appreciated. Regards Chakra