CORROSION OF TREMIE PIPE OF W0714 FILM EVAPORATOR OF HEXANOLACTAM

Corrosion mechanism of Tremie pipe of W0714 film evaporator of hexanolactam was investigated by chemical method,optical microscope and SEM etc..the results showed that the non-sensitive intergranular corrosion took place on the Tremie pipe in the non-oxidizability medium.the potential of 304L SS in the medium was located at the transpassivation region,which resulted in the corrosion of the Tremie pipe.