The effect of the diffusive, composite chromium nitride layers produced by a hybrid surface treatment on the corrosion behavior of AZ91D magnesium alloy

Michał Tacikowski , Janusz Kamiński , Jacek Rudnicki , Tomasz Borowski , Maria Trzaska , Tadeusz Wierzchoń

Abstract

The layers based on chromium nitride were produced on the AZ91D magnesium alloy using a hybrid surface treatment. The treatment consists of nitriding of the chromium-precoated magnesium alloy. The proposed treatment yields diffusive, composite gradient-type chromium nitride layers which are diffusion-bonded to the substrate. The effect of these layers on the corrosion behavior of the AZ91D magnesium alloy was investigated by the potentiodynamic and impedance spectrometry methods. It was found that the formation of the diffusive, composite chromium nitride layers on the AZ91D alloy may result in a significant decrease of the corrosion activity measured by the corrosion potential. This effect is correlated with the layer thickness and becomes significant with relatively thin layers (less than 1 μm thick). Moreover, with the thin layers the impedance modulus is the highest and phase angle has a beneficial character.
Author Michał Tacikowski ZIP
Michał Tacikowski,,
- Division of Surface Engineering
, Janusz Kamiński ZIP
Janusz Kamiński,,
- Division of Surface Engineering
, Jacek Rudnicki ZIP
Jacek Rudnicki,,
- Division of Surface Engineering
, Tomasz Borowski ZIP
Tomasz Borowski,,
- Division of Surface Engineering
, Maria Trzaska ZIP
Maria Trzaska,,
- Division of Surface Engineering
, Tadeusz Wierzchoń ZIP
Tadeusz Wierzchoń,,
- Division of Surface Engineering
Journal seriesVacuum, ISSN 0042-207X
Issue year2011
Vol85
No10
Pages938-942
Keywords in EnglishChromium nitride, corrosion resistance, Diffusive layers, Hybrid surface treatment, Magnesium alloys
DOIDOI:10.1016/j.vacuum.2011.01.016
URL http://www.sciencedirect.com/science/article/pii/S0042207X11000406
Languageen angielski
Score (nominal)20
Publication indicators WoS Impact Factor: 2011 = 1.317 (2) - 2011=1.208 (5)
Citation count*8 (2015-05-29)
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