Effects of dissolved Ca2+and Mg2+on passivity of UNS N08800 alloy in simulated crevice chemistries with and without Pb contamination at 300°C

B. T. Lu, L. P. Tian, R. K. Zhu, N. Li, San-Qiang Shi, J. L. Luo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

Abstract

The effects of Ca2+and Mg2+on passivity of UNS N08800 alloy at 300°C are experimentally investigated in simulated crevice chemistries. In the Pb-free solutions, the impacts of Ca2+and/or Mg2+are similarly detrimental, but less in extent, as those caused by Pb-contamination, as indicated by the increased passive current density, the lower breakdown potential, the promoted incorporation of hydrogen into the passive films and the formation of the films with highly defective structures containing more MOH bonds. However, when Ca2+and/or Mg2+are/is concurrently present with Pb cation, they mitigate the detrimental impact of lead on the passivity.
Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalCorrosion Science
Volume100
DOIs
Publication statusPublished - 1 Nov 2015

Keywords

  • Anodic films
  • High temperature corrosion
  • Passivity
  • Stainless steel

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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