Open Access Conference Proceedings

Abstract: The electrochemical anodization of titanium has received a lot of attention in recent years, especially for its application for biomedical purposes, offering a biocompatible titanium oxide with architecture of a large energy surface, and highly controllable nanoscale characteristics.In this work, TiO2 layers were synthesized on a well-polished titanium surface, by the anodizing technique, under a voltage of 20 V, for 15, 30 and 45 minutes respectively, using as specific electrolyte: 1M CH3COOH /1M Na2SO4/0.5 Wt% NaF.Interfacial integrity and variation of elemental composition along the interface were studied by scanning electron microscopy (SEM), equipped with an energy dispersive X-ray analyzer (EDX). Electrochemical behaviour was studied both by measuring the evolution of open circuit potential (OCP), by electrochemical impedance spectroscopy (EIS), and by linear polarization (LP) in Hank's solution as a physiological environment. [..] Read more

Abstract: The corrosion inhibition of aluminium and steel in the hydrochloric acid solution by 1-octyl-3-methylimidazolium bromide, 1-octyl-3-methylimidazolium hydrogensulphate and 1-dodecyl-3-methylimidazolium bromide was investigated using electrochemical and weight loss methods. The qualitative surface analysis was carried out. [..] Read more

Abstract: Beer is a widely consumed alcoholic beverage throughout the world and global production figures have shown an increase in trend during the last decade. Many failures and corrosion problems encountered in brewery and fermentation process due to corrosivity of fluids which are rather acidic and also contain live microfauna. [..] Read more

Abstract: In the paper, the influence of high temperature and hot pressure steam on the microstructure and phase composition of HVOF sprayed wear resistant Cr3C2-NiCr coating and flame sprayed NiCrAl-Bentonite abradable coating is studied. Both the results of laboratory oxidation tests and the long-term exposition tests in the steam turbine are presented. [..] Read more

Abstract: The paper presents the results of the study how the sub-zero treatment of Vanadis 6 steel influences the corrosion resistance of the material. The sub-zero treatment was performed at -196 oC in liquid nitrogen for 17 h. [..] Read more

Abstract: The paper shows the effect of thermo-chemical treatment: hardening, titanizing and boronizing of steel grade 56Si7 and 41CrAlMo7 applied for the production of yarn guides used in the textile industry. During the investigations the impact of treatment on the structure change, thickness, hardness and wear resistance of the achieved surface layers were determined. [..] Read more

Abstract: In the present work, the influence of polymorphic transformations on the porosity of plasma sprayed products produced from pure aluminum oxide was investigated. Scanning electron microscopy, quantitative X-ray diffraction analysis, and X-ray computer tomography are used to quantify the porosity. [..] Read more

Abstract: The paper offers an analysis of the fluoride conversion coating prepared on ZE10 magnesium alloy with the aim to improve material corrosion properties with respect to the biocompatibility of the alloy. The coating was prepared via unconventional process, by immersion of the alloy in Na[BF4] molten salt at 430 and 450 °C for various treatment times. [..] Read more

Abstract: This paper includes the microstructural and wear characterization of WC-10Co4Cr coating on AZ91 magnesium alloy. Using the scanning electron microscopy and X-ray diffraction analysis it was determined that the microstructure was formed by WC particles, CoCr matrix, present Co3W3C mixed carbide, W2C, and free carbon. [..] Read more

Abstract: Pulse thermography is a method for an inspection of near surface defects. The method is based on heating a tested object with an excitation source (e.g. [..] Read more

Abstract: The purpose of the work was to assess the influence of the vibro-abrasive treatment on the quality of the zinc coating. The use of vibro-abrasive finishing in the production process of fittings for overhead power line is designed to improve the aesthetics of the coating by eliminating zinc beads and burrs, as well as shorten the time of detecting the details on the production. [..] Read more

Abstract: The main factor for operating characteristics of sliding bearing is a quality of the lining surface. For low friction and better functionality, the coating of sliding surface is commonly used. [..] Read more

Abstract: Welding and additive manufacturing of titanium and other sensitive materials are particularly problematic due to their high oxygen affinity. The melting pool has to be protected from oxidation not only during the welding proces but also after its crystallization up to about 300 Celsius degrees. [..] Read more

Abstract: Sputter-deposited Zr/Nb nanometric multilayer films with a periodicity (L) in the range from 6 to 167 nm were subjected to carbon, silicon and copper ion irradiation with low and high fluences at room temperature. The ion profiles, mechanical proprieties, and disordering behavior have been investigated by using a variety of experimental techniques (Secondary Ion Mass Spectrometry - SIMS, nanoindentation, X-ray diffraction - XRD, and scanning transmission electron microscopy - STEM). [..] Read more

Abstract: The technology of preparation and subsequent use of nanoparticles is currently a very actual topic, because these particles may have different properties opposite to the conventional materials from which these particles are produced. This article is focused on the production and application of titanium dioxide nanoparticles produced using different methods and their application to the PTFE matrix to create the functional composite coating. [..] Read more

Abstract: The study of the geometric characteristics of the metal sheet surface with textured polymer coatings is justified by their connection with mechanical and optical properties. Studying of the surface of coated samples using optical microscopy revealed that it consists of grooves that are assembled into star-shaped clusters scattered across the entire surface of the sheet. [..] Read more

Abstract: Metal products with ttextured polymer coatings are distinguished by high strength, durability and esthetic qualities, which give to building structures (roof, etc.) a natural and noble appearance. At modern metallurgical enterprises, the correspondence of the color and texture of the polymer coating with the required parameters (color difference, gloss, etc.) is estimated often visually (“by eye”), without the use of magnifying devices. [..] Read more

Abstract: The paper presents the results of electrolytic-plasma surface hardening (EPSH) of steel 40KhN. The optimal electrolyte composition for EPSH of 40KhN steel containing 10% sodium carbonate and 15% carbamide, which does not cause the surface layer to erosion, oxidation and decarburization, is determined. [..] Read more

Abstract: Copper and aluminum are both widely applicable in a variety of industrial and commercial branches, from automotive to electrotechnics and laminated materials and clad composites are innovative and perspective solutions for various applications. This study deals with the investigation of structure development via internal stress analyses, grains size observation, and residual stress analyses within Al-Cu clad composites rotary swaged at room temperature and at 250 °C by optical and electron microscopy, EBSD analyses and microhardness measurements. [..] Read more

Abstract: The issues which appears at fusion welding of 6082 T6 aluminum alloy are connected with hot cracking (solidification and liquation crackings), porosity and over aging of a portion from heat-affected zone (HAZ). Relatively high thermal expansion and the wide range solidification temperature of the Al alloy are the main causes of susceptibility to welding cracking. [..] Read more