A XPS study of the Mo effect on passivation behaviors for highly controlled stainless steels in neutral and alkaline conditions

Thiago J. Mesquita, Eric Chauveau, Marc Mantel, Ricardo P. Nogueira

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

The objective of this work is to study the effect of Mo additions on film passive properties of three different stainless steels (SS) types (austenitic, ferritic and duplex alloys). A comparison between Mo containing (3 wt% Mo) and free Mo (0 wt% Mo) grades of highly controlled laboratory heats was done considering their passive film formed in different aggressive conditions, from neutral to alkaline pH. The presence of oxidized Mo on the passive layer was confirmed by X-ray photoelectron Spectroscopy (XPS). The presence of Mo within the passive film improved the passivity breakdown potential for the duplex and ferritic SS, but seemed to have no effect for austenitic SS.

Original languageBritish English
Pages (from-to)90-97
Number of pages8
JournalApplied Surface Science
Volume270
DOIs
StatePublished - 1 Apr 2013

Keywords

  • Corrosion
  • Molybdenum
  • Passive Layer
  • Stainless Steels

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