The Effect of Tightening on the Corrosion Properties of the PVD Layers on Magnesium AZ91D AlloyReport as inadecuate




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The corrosiveproperties of PVD TiN-Ti-Al type composite titanium nitride layer with titaniumand aluminium sub-layers system on the AZ91D magnesium alloy and its sub-layerswere investigated by using polarization method and impedance spectroscopy,specifically, in terms of the hydrothermal tightening effect. The aim was toexplain the mechanisms which contribute to high anticorrosive propertiesobtained by hydrothermal tightening. It was stated that the hydrothermaltreatment changes the surface topography of the examined layers, most probablydue to the formation of a continuous titanium oxides film. Tighteningsignificantly modifies the corrosion resistance of the particular componentsub-layers of the TiN-Ti-Al layer which exhibits optimum electrochemicalparameters. It was shown that the increase of the electrochemical parameters iscontrolled by tightening of the outside titanium nitride layer, whereas thealuminium sub-layer plays a critical role in creating proper conditions for thehydrothermal tightening of titanium nitride.

KEYWORDS

Magnesium Alloys, Titanium Nitride, PVD Layers, Tightening, Corrosion Resistance

Cite this paper

Kaminski, J. , Tacikowski, M. , Brojanowska, A. , Kucharska, B. and Wierzchon, T. 2014 The Effect of Tightening on the Corrosion Properties of the PVD Layers on Magnesium AZ91D Alloy. Journal of Surface Engineered Materials and Advanced Technology, 4, 270-281. doi: 10.4236-jsemat.2014.45031.





Author: Janusz Kaminski, Michał Tacikowski, Agnieszka Brojanowska, Beata Kucharska, Tadeusz Wierzchon

Source: http://www.scirp.org/



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