STUDY ON THE INFLUENCE OF THE TECHNOLOGICAL PARAMETERS OVER THE CORROSION BEHAVIOR AND SURFACE CHARACTERIZATION OF Ti-6Al-4V AND Ti-6Al-7Nb ALLOYS AFTER PLASMA GAS NITRIDING

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  • TITLE: STUDY ON THE INFLUENCE OF THE TECHNOLOGICAL PARAMETERS OVER THE CORROSION BEHAVIOR AND SURFACE CHARACTERIZATION OF Ti-6Al-4V AND Ti-6Al-7Nb ALLOYS AFTER PLASMA GAS NITRIDING
  • AUTHOR(S): H. Skulev, D. Veselinov
  • ABSTRACT: Titanium and titanium alloys are very attractive materials because of their superior combination of properties that enable their application in many industries. One of their biggest advantage is their excellent corrosion resistance. Two commercial titanium alloys Ti-6Al-4V and Ti-6Al-7Nb have been plasma gas nitrided with 20 kW power in a chamber with pure nitrogen atmosphere for 10 min to improve their surface properties. Their corrosion behavior before and after surface treatment has been studied using a weight loss method. Different media including 4.9M HCl, 0.5M NaCl, and 1.8M H2SO4 have been used at different temperatures (20 ºC, 40 ºC, and 80 ºC), for various periods of time to study the influence of the medium and temperature on the corrosion behavior of these materials. The phase modifications and the microstructure of the nitrided layers have been analyzed using X- ray diffraction and optical microscopy.
  • PAGES: 59-
  • DOWNLOAD: STUDY ON THE INFLUENCE OF THE TECHNOLOGICAL PARAMETERS OVER THE CORROSION BEHAVIOR AND SURFACE CHARACTERIZATION OF Ti-6Al-4V AND Ti-6Al-7Nb ALLOYS AFTER PLASMA GAS NITRIDING