Effect of crevice former on the corrosion behavior of 316L stainless steel in chloride-containing synthetic tap water

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Abstract

To restrain the failure of plate heat exchanger (PHE) in customer boiler working fluid, the effect of crevice former type on the corrosion behavior of Type 316L (UNS S31603) stainless steel plate was investigated using electrochemical methods and surface analysis in chloride-containing synthetic tap water. Although the localized corrosion under metal-metal crevice condition was initiated easier than that under metal-gasket crevice specimen due to the restricted mass transport at the crevice mouth, the anodic current under metal-metal crevice condition was lower than that under metal-gasket crevice condition at a higher anodic potential. Narrow crevice gap which was formed under gasket accelerated the anodic dissolution at the mouth of crevice, and then caused the perforation of PHE in the field condition. Moreover, due to the small corroded area at the initiation stage, the anodic dissolution depth of metal-gasket crevice specimen was deeper than that of metal-metal crevice specimen.

Original languageEnglish
Title of host publicationCorrosion Conference and Expo 2017
PublisherNational Assoc. of Corrosion Engineers International
Pages5642-5653
Number of pages12
ISBN (Electronic)9781510840348
StatePublished - 2017
EventCorrosion Conference and Expo 2017 - New Orleans, United States
Duration: 26 Mar 201730 Mar 2017

Publication series

NameNACE - International Corrosion Conference Series
Volume8
ISSN (Print)0361-4409

Conference

ConferenceCorrosion Conference and Expo 2017
Country/TerritoryUnited States
CityNew Orleans
Period26/03/1730/03/17

Keywords

  • Corrosion
  • Polarization
  • Steel
  • Stress corrosion cracking
  • Weld

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