Effect of the Crevice Former on the Corrosion Behavior of 316L Stainless Steel in Chloride-Containing Synthetic Tap Water

  • Seon-Hong Kim
  • Ji-Hoon Lee
  • Jung-Gu Kim
  • Woo-Cheol Kim


To restrain the failure of the plate heat exchanger (PHE) in customer boiler working fluid, the effect of crevice former type on the corrosion behavior of the 316L stainless steel plate was investigated using electrochemical methods and surface analyses in chloride-containing synthetic tap water (60 °C). The localized corrosion under metal–metal crevice condition was initiated more easily than that under the metal-gasket crevice condition due to the restricted mass transport at the gasket crevice mouth. However, the anodic current under the metal–metal crevice condition was lower than that under metal-gasket crevice condition at a higher anodic potential, indicating that that the metal dissolution under EPDM crevice would be higher than that under metal crevice under the accelerated corrosion condition. Because narrow crevice gap that was formed under gasket accelerated the anodic dissolution at the crevice mouth, the perforation tendency under metal-gasket crevice condition is much higher than that under metal–metal crevice condition. As a result, the crevice geometry, especially the crevice gap, mainly affected the corrosion behavior of PHE material.


Alloys Metals Corrosion Electrochemistry Surface 



This research was supported by the Korea District Heating Corporation.


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Copyright information

© The Korean Institute of Metals and Materials 2018

Authors and Affiliations

  • Seon-Hong Kim
    • 1
  • Ji-Hoon Lee
    • 1
  • Jung-Gu Kim
    • 1
  • Woo-Cheol Kim
    • 2
  1. 1.School of Advanced Materials Science and EngineeringSungkyunkwan UniversitySuwonRepublic of Korea
  2. 2.R&D InstituteKorea District Heating CorporationSeoulRepublic of Korea

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