Effect of mixed salts on atmospheric corrosion of 304 stainless steel

Liya Guo, Na Mi, Mohammed-Ali Haval B., Ghahari Majid, Andrew Du Plessis, Angus Cook, Steven Street, C. Reinhard, Robert C Atwood, Trevor Rayment, Alison Davenport

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
235 Downloads (Pure)

Abstract

Atmospheric corrosion of stainless steel can take place when airborne salt particles deposit on the metal surface, formingdroplets when the relative humidity (RH) reaches a critical value: the deliquescence relative humidity of the salt. Most workto date has focused on single salts such as MgCl2 or NaCl. In the present work, the effect of mixed salts is investigated at 45% RH, above the deliquescence relative humidityof MgCl2 but below that of NaCl. Dish-shaped pits were found in pure MgCl2 solutions and mixed solutions. Crevice corrosion takes place under NaCl crystals. This is shown both with ex situ measurementsand in situ time-dependent measurements using X-ray microtomography, where pit growth was also monitored.
Original languageEnglish
Pages (from-to)C3010-C3014
JournalJournal of the Electrochemical Society
Volume166
Issue number11
DOIs
Publication statusPublished - 9 Jan 2019

Keywords

  • Corrosion
  • Atmospheric corrosion
  • Stainless Steel
  • X-Ray Diffraction

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