Corrosion Behavior of 254SMo and TP317L Stainless Steels in Papermaking Intermediate Water Environment

Abstract

The corrosion behavior of 254SMo and TP317L stainless steels in the primary and secondary water of papermaking intermediate waters was investigated with electrochemical tests and electron- microscope(EM) technique. This aims to provide the basis for material selection of the condenser of a new 600 MW heating unit. The results show that Cl-promoted the pitting corrosion of 254SMo and TP317L in papermaking intermediate waters; under the same water quality condition, the corrosion resistance of TP317L in primary water is better than that in secondary water, 254SMo just the reverse. Whether in primary water or secondary water, 254SMo shows much excellent resistance to pitting corrosion rather than TP317L.