Effects of gasket materials on the crevice corrosion resistance of stainless steel flanges have been investigated in natural seawater and related chloride containing waters. Results for tests comprising cast
CF3M (UNS J92800(1)) wrought Type 316 (UNS S31600(1)) flanges having grooved and smooth finishes are discussed. Overall, natural and synthetic elastomer-type gaskets were less likely to promote crevice
corrosion than PTFE gaskets and others containing fibers. Whale carbon and graphite containing gaskets promoted crevice corrosion, some others promoted even greater attack. Keywords: crevice corrosion, stainless steel, gaskets, seawater, chlorides and sulfate, flanges, surface roughness