Study on corrosion behavior of AISI316L and SAF2205 stainless steels in acetic acid solution containing Br-ion

Liang Bin, Gong Jianming, Tu Shantung, Yong Jiang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Petrochemical equipments made of austenitic stainless steel are often used in the environment of acetic acid solution. Premature corrosion failure led by acetic acid solution containing Cl- or Br- occurs in service. In the present paper, corrosion behavior of AISI316L austenitic stainless steel and SAF2205 duplex stainless steel in acetic acid solution containing Br-ion was studied by measuring the corrosion weight loss and Potentiodynamic anodic polarization curve. Effects of temperature and Br - concentration on the corrosion behaviors of AISI316L and SAF2205 material were investigated. The research results show that the corrosion rate markedly increases and pitting potential rapidly decreases with increasing temperature and Br- ion concentration. The pitting resistance of SAF2205 stainless steels is superior to AISI316L. For sensitized AISI316L and SAF2205 stainless steels, the similar rules were founded with increasing Br - concentration; sensitizing treatment will lead to decrease in corrosion resistance. Pitting induced by Br ion preferentially occurred at austenitic boundaries for sensitized AISI316L stainless steels, whereas pitting preferentially occurred at austenitic boundaries, ferrite-austenite boundaries and ferrite boundaries for sensitized SAF2205 duplex stainless steels.

Original languageEnglish
Title of host publicationProceedings of 2006 ASME Pressure Vessels and Piping Division Conference - ASME PVP2006/ICPVT-11 Conference - Pressure Vessel Technologies for the Global Community
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)0791837823, 9780791837825
DOIs
StatePublished - 2006
Externally publishedYes
EventASME PVP2006/ICPVT-11 Conference - Vancouver, BC, Canada
Duration: 23 Jul 200627 Jul 2006

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume2006
ISSN (Print)0277-027X

Conference

ConferenceASME PVP2006/ICPVT-11 Conference
Country/TerritoryCanada
CityVancouver, BC
Period23/07/0627/07/06

Keywords

  • Acetic acid
  • Br ion
  • Pitting corrosion
  • Sensitization
  • Stainless steel

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