Corrosion behavior of nitrided Ni3Al intermetallic alloy in 0.5 M H2SO4

E. Tapia-Bahena, H. Martinez, J. Porcayo-Calderon, J. G. Gonzalez-Rodriguez*, L. Martinez-Gomez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of plasma nitriding on the corrosion behavior of Ni3Al intermetallic alloy in 0.5 M H2SO4 solution at 60°C has been investigated by using potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) measurements. Specimens were plasma nitrided at 500 and 600°C during 8, 16 and 24 hours and were characterized by x-ray diffraction and scanning electronic microscopy. Results have shown that the thickness of nitride layer increased with nitriding time and temperature. Passive film properties were improved by nitriding. The corrosion resistance of nitride specimens increased with an increase either in the nitriding time or temperature. Specimens were susceptible to both uniform and localized types of corrosion.

Original languageEnglish
Pages (from-to)11323-11334
Number of pages12
JournalInternational Journal of Electrochemical Science
Volume13
Issue number11
DOIs
StatePublished - 1 Nov 2018

Bibliographical note

Publisher Copyright:
© 2018 The Authors.

Keywords

  • Acid corrosion
  • NiAl
  • Nitriding

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