Effect of nitrogen on the corrosion behavior of austenitic stainless steel in chloride solutions

Fathy M. Bayoumi, Wafaa A. Ghanem

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)

Abstract

The effect of partial replacement of nickel with nitrogen on the mechanism of localized corrosion resistance and repassivation for nitrogen-bearing stainless steel was investigated using anodic potentiodynamic polarization technique. The solutions used for this study contained 0.0, 0.05 and 0.33 M Fe3+ for solutions I, II and III, respectively, in a total Cl - ion concentration 1 M. The pitting attack was found to be retarded by nitrogen addition and the samples were able to passivate as the nitrogen increase. Addition of nitrogen allows the decrease in the wt.% of Ni, but to a certain limit. Nitrogen is adsorbed on the interface of the metal oxide and results in the repulsion of Cl- ions. Moreover, it reacts with H + ions in the solution leading to higher pH, which explains the retardation effect of nitrogen to corrosion.

Original languageEnglish
Pages (from-to)3311-3314
Number of pages4
JournalMaterials Letters
Volume59
Issue number26
DOIs
Publication statusPublished - Nov 2005
Externally publishedYes

Keywords

  • Anodic polarization
  • Localized corrosion
  • Nitrogen stainless steel
  • Pitting corrosion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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