BACKGROUND Technological advances in wire selection and bracket design have led to improved treatment efficiency and allowed longer time intervals between appliance adjustments. The wires remain in the mouth for a longer duration and are subjected to electrochemical reactions, mechanical forces of mastication and generalized wear. These cause different types of corrosion. This study was done to...

Este artigo demonstra a possibilidade de se realizar uma determinação simultânea de chumbo e cobre em água mineral, de rio e de torneira mediante análise por redissolução potenciométrica empregando um potenciostato lab-made de baixo custo e um método de processamento de sinais baseado em wavelets. As concentrações encontradas para Pb(II) e Cu(II) situaram-se na faixa 3-7 μg L. Os desvios padrão...

Friction stir processing was done for surface modification of cast Magnesium-Aluminum alloy. The microstructural characteristics related to different phases untreated alloy, friction processed under process parameters like rotational speeds at 380rpm and 545 rpm with 31.5 mm/min transverse speed without pure aluminum powder were investigated by Metallurgical microscopy lower magnification scann...

In this study, the influence of high-pressure torsion (HPT) processing parameters and solution treatment (ST) on corrosion tribocorrosion behavior CoCrMo (CCM) alloys was investigated for possible usage in biomedical applications. The CCM by using potentiodynamic scanning (PDS) electrochemical impedance spectroscopy (EIS) tests. Tribocorrosion tests were carried out a reciprocating ball-on-plat...

The hardness and corrosion resistance of nickel (Ni) deposit on a substrate could be reached by controlling electrolyte temperature during deposition. In this research, the electrodeposition Ni at various temperatures electrolytes was performed. Electrodeposited films using an optical digital camera, X-ray diffraction (XRD), scanning electron microscope with energy-dispersive x-ray spectroscopy...

The presence of microorganisms performing extracellular electron transfer has been established in many environments. Research to determine their role is moving slowly due the high cost potentiostats and variance data with small number replicates. Here, we present a 128-channel potentiostat, connected 128 gold electrode array. Whereas system able perform simultaneously (bio)electrochemical measu...

Low-carbon steel is widely used in industrial pipelines, and corrosion studies are focused mostly on erosion-corrosion, its prediction control. In this paper, the rate pipelines modeled using a flow loop measured by linear polarization resistance method (LPR) 3-electrode setup for API-5L-X65 QT steel. Optical microscopy SEM conducted to examine surface of sample products. The effect NaCl concen...

Water quality is essential to both human and ecosystem health, a fast detection of emerging pollutants claimed, along with effective wastewater treatment plants eliminate these types substances. The goal this study was the development sensitive selective methodology customize handle device that meets demand. Clozapine its pharmacological formulation, Leponex®, were used as model. results obtain...