Corrosion Resistance of the Inconel 740H Nickel Alloy after Pulse Plasma Nitriding at a Frequency of 10 kHz

Ryszard Sitek , Janusz Kamiński , Jarosław Mizera

Abstract

The microstructure and corrosion resistance of the CrN, Cr2N layer produced by pulse plasma ion nitriding at a frequency of 10 kHz on the Inconel 740H nickel superalloy were examined. The microstructure of the layers were characterized by light microscope and scanning electron microscopy. The corrosion resistance was examined by the impedance and potentiodynamic methods in a 0.1 M Na2SO4 solution and an acidified (pH = 4) 0.1 M NaCl solution at room temperature. The layer obtained, about 4.5 μm thick, contains CrN, Cr2N phases. It is continuous on the entire cross-section of the sample and adheres well to the substrate. However, in the chloride environment it constitutes an inhomogeneous cathodic coating for corrosion and thereby intensifies pitting corrosion of the material. In chloride-less environment, on the other hand, the layer has no essential effect on the corrosion rate of the Inconel 740H nickel alloy.
Author Ryszard Sitek ZPM
Ryszard Sitek,,
- Division of Materials Design
, Janusz Kamiński ZIP
Janusz Kamiński,,
- Division of Surface Engineering
, Jarosław Mizera ZPM
Jarosław Mizera,,
- Division of Materials Design
Journal seriesActa Physica Polonica A, ISSN 0587-4246
Issue year2016
Vol129
No4
Pages584-587
Publication size in sheets0.5
Keywords in EnglishNickel-chromium alloys – Corrosion, Corrosion resistance, Nitriding, Microstructure, Scanning electron microscopy, Plasma (Ionized gases), Inconel
DOIDOI:10.12693/APhysPolA.129.584
URL http://web.b.ebscohost.com/ehost/detail/detail?vid=0&sid=9eb7c15e-c0aa-44cb-ac3c-c79a615a3998%40sessionmgr2&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#AN=115876908&db=a9h
Languageen angielski
Score (nominal)15
ScoreMinisterial score = 15.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 15.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 0.469 (2) - 2016=0.489 (5)
Citation count*0
Cite
Share Share



* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back