A review of the operational history of Hot Potassium Carbonate (HPC) acid gas removal
plants has shown that corrosion incidents have been attributed to a number of events and
that corrosion problems have been long standing. Usually a recalcitrant long-standing
problem can be identified as occurring at a specific time and be linked with a change to
process / plant operating conditions and hence it is beneficial to widely review the operating
history of a process. Such an approach may be supported by the framework of the Six Sigma
methodology.