Glow discharge optical emission spectroscopy (GDOES) is a useful technique for qualitative plasma characterization. It also enables depth profiling of solid materials upon exposure samples to energetic positively charged ions from gaseous plasma, providing specifics both surface- and gas-phase collision phenomena that are considered. The early stages developing GDOES the determination surface c...

Aluminium alloys such as AA2024 are susceptible to severe corrosion attack in aggressive solutions (e.g. chlorides). Conversion coatings, like chromate, or rare earth conversion coatings are usually applied in order to improve corrosion behaviour of aluminium alloys. Methacrylate-based hybrid films deposited with sol–gel technique might be an alternative to conversion coatings. Barrier properti...

The GDOES and GDMS analytical systems working in Pulsed RF regime have some distinct advantages compared to non-pulsed glow discharge analytical systems. In this paper we report a rise in MS ionic signals, and in emission atomic lines of analysts in the beginning of the afterglow of RF pulsed GD sources. Making experimental studies with Langmuir probe we demonstrate that the ionization and exci...

Paper presents the research of austenitic steel AISI 304after ion nitriding at 400◦C and at t =4h, for the two different variants of samples distribution in the working plasma reactive chamber tube. In order to assess the effectiveness of ion nitriding variants emission spectroscopy – GDOES, surface hardness tests, microstructure research (LM) of nitrided layers were made. It has been found tha...

The article deals with mechanical properties of layers which were created by plasma nitriding technology. Nitrided layers apply to steel AISI 4140 were evaluated by metallographic method, GDOES method, microanalysis method and microhardness method. The trend of mechanical properties was experimentally obtained in dependence on length of cavity during plasma nitriding process. Moreover, the infl...

Thin polymer films were deposited on polished stainless-steel samples by PECVD from a cyclopropylamine precursor and characterized X-ray photoelectron spectroscopy, secondary-ion mass spectrometry glow-discharge optical emission spectroscopy (GDOES) depth profiling. These profiles exhibited reasonable agreement. The GDOES involved the erosion of in plasma sustained an asymmetric RF capacitively...

diffusion of nitrogen in plasma nitrided iron and structural evolution during the nitriding process were evaluated by several characterization techniques including optical microscopy (om), microhardness depth profiling (hdp), scanning electron microscopy (sem), x-ray diffraction (xrd), glow discharge optical emission spectroscopy (gdoes), and secondary ion mass spectroscopy (sims). plasma nitri...

The selection of appropriate surface pretreatments is one the pending issues for industrial application cerium-based chemical conversion coatings (CeCC) as an alternative toxic chromate coating (CrCC). A two-step pretreatment based on commercial products has been successfully used here to obtain CeCC AA2024-T3 and AA7075-T6. Specimens processed 1 15 min in solutions containing CeCl3 H2O2 have s...