On the electropolishing and anodic oxidation of Ti-15Mo alloy

This paper presents research on modifying the surface of Ti-15Mo alloy using electropolishing and anodic passivation. The electropolishing process was carried out in solutions containing sulfuric acid, ethylene glycol, ammonium fluoride and oxalic acid. Whereas a voltage range from 20 to 100 V and a 1 M orthophosphoric acid solution were used during the anodic passivation. The influence of above mentioned processes parameters on the quality of the obtained oxide layer on Ti-15Mo alloy was investigated. The analysis of Ti-15Mo surface after modification was performed using scanning electron microscopy (SEM), atomic force microscopy (AFM), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), ellipsometry, and mechanical tests. Moreover, the corrosion resistance was investigated using a potentiostatic method in Ringer's solution. It was found that electropolishing leads to an increase in the surface homogeneity and to the form of an oxide layer, which consisted of TiO2 and MoO3. Whereas the oxide layers obtained during anodic passivation were characterized by different properties depending on the applied voltage. The anodic passivation at various voltages (20-100 V) increased the surface wettability (94.5°-87.6°) in comparison to the electropolished sample (97.5°). Moreover, the obtained oxide layer after anodization exhibited a high hardness. The electrolytic polishing and anodic passivation of Ti-15Mo also improved corrosion resistance of the alloy in contact with Ringer's solution. The sample anodized at 80 V presented the highest corrosion resistance by the smallest corrosion current density (1.4 nA cm-2) and the highest polarization resistance (37.4 MΩ cm2). © 2016 Elsevier Ltd. All rights reserved

Application of computer simulations in mobile inspection robots designing process

Obecnie z uwagi na koszty wykonania fizycznych modeli testowych niezbędne jest projektowanie i badanie nowych urządzeń z wykorzystaniem komputera. Systemy CAD/CAE umożliwiają wielokrotną modyfikację konstrukcji oraz jej analizę np. pod kątem zgodności z wymogami użytkownika, ergonomią czy obowiązującymi normami technicznymi. Symulacje pracy układu pozwalają z kolei ocenić m.in. prawidłowość współpracy mechanizmów, wytrzymałość konstrukcji lub jej działanie w szczególnych warunkach środowiskowych. Referat opisuje wyniki użycia narzędzi do projektowania i symulacji przemysłowego mobilnego robota inspekcyjnego, opracowanego w Przemysłowym Instytucie Automatyki i Pomiarów.Nowadays, considering the costs of making physical test models it is necessary to design and verify new devices using a computer. CAD/CAE systems enable multiple construction modification and its analysis of, for example, accordance to user's needs, ergonomics or obligatory technical norms. Simulations of the work of the construction allow to consider, for example, correctness of the cooperation of the mechanisms, strength of the construction or its working in specific environmental conditions. This paper describes the results of the use of the designing and simulation tools for industrial mobile inspection robot, built in Industrial Research Institute for Automation and Measurements