A STATISTICAL EVALUATION OF CREVICE CORROSION ON TYPE-304 STAINLESS-STEEL

A multiple crevice corrosion monitor has been developed in order to ev aluate the susceptibility to crevice corrosion for Type 304 stainless steel in chloride-containing solution, in terms of the probability dis tribution for occurrence of crevice corrosion. The potentials within c revices formed by a polyacetal washer, which is designed by referring to ASTM G78-83, have been monitored to detect the generation of crevic e corrosion. The survival (i.e. no corrosion) probability, P, with tim es is described as, In P = - lambda(t - t0) where t0 is the incubation time before which no crevice corrosion initiates. The crevice corrosi on generation rate, lambda, was described as a function of the applied potential and the temperature.