A5044900148- Corrosion Behavior and Inhibition
- Anodic Oxide Films and Nanostructures
- Hydrogen embrittlement and corrosion behaviors in metals
- Concrete Corrosion and Durability
- Non-Destructive Testing Techniques
- Smart Materials for Construction
- Electrocatalysts for Energy Conversion
- Metal and Thin Film Mechanics
- Semiconductor materials and interfaces
- Magnesium Alloys: Properties and Applications
- Advanced Machining and Optimization Techniques
- TiO2 Photocatalysis and Solar Cells
- Layered Double Hydroxides Synthesis and Applications
- Microstructure and Mechanical Properties of Steels
- Material Properties and Failure Mechanisms
- Welding Techniques and Residual Stresses
- Aluminum Alloy Microstructure Properties
- Conducting polymers and applications
- Semiconductor materials and devices
- Advanced Surface Polishing Techniques
- Bone Tissue Engineering Materials
- Advanced Welding Techniques Analysis
- Electrospun Nanofibers in Biomedical Applications
- Advancements in Battery Materials
- Minerals Flotation and Separation Techniques
Universidade Federal do Rio Grande do Sul
2016-2025
University of Rio Grande and Rio Grande Community College
2006-2010
University of Lisbon
2009
University of Aveiro
2009
Friedrich-Alexander-Universität Erlangen-Nürnberg
2006
Zn−Al and Mg−Al layered double hydroxides (LDHs) loaded with quinaldate 2-mercaptobenzothiazolate anions were synthesized via anion-exchange reaction. The resulting compounds characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy/energy-dispersive spectroscopy. Spectrophotometric measurements demonstrated that the release of organic from these LDHs into bulk solution is triggered presence chloride anions, evidencing nature this process....
The anodic formation of self-organized porous on titanium was investigated in 1 M electrolytes containing 0.5 wt % by potential sweeps to . By a combination electrochemical, morphological, and compositional information we show that the sweep rate has significant influence initiation growth structures. In first phase anodization process, precursor barrier type oxide film is formed; underneath this pores then start growing randomly self-organize. High-aspect-ratio nanostructures can be...
This work presents new anticorrosive coatings for the AZ31 magnesium alloy, based on hybrid sol–gel films doped with a corrosion inhibitor. The were prepared by copolymerization of 3-glycidoxypropyltrimethoxysilane and zirconium (IV) tetrapropoxide. 8-Hydroxyquinoline (8-HQ) was chosen as inhibitor to be incorporated into at two different stages synthesis, either before or after hydrolysis precursors. effectiveness 8-HQ suppression verified Scanning Vibrating Electrode Technique....
The galvanostatic formation of self-organized nanotubular layers on titanium was investigated in electrolytes. Under specific electrochemical conditions (anodization above a critical current density) large potential oscillations were observed. and morphological investigations show that these oscillatory phenomena are coupled with sequential growth the nanotube layer subsequent lift-off layers. origin detachment process is related to disordered porous film underneath first tubular at higher...
This study presents an innovative approach to creating antibacterial aluminum surfaces by combining the properties of silver nanoparticles (Ag NPs) with nanoarchitecture anodized oxide in one step. An Al-Ag alloy containing 10 wt % Ag was synthesized and 0.3 M oxalic acid. NPs precipitated solid state during anodization, resulting a porous nanocomposite structure. Comprehensive characterization using SEM, TEM, EDS revealed 43 μm thick layer uniformly distributed nanopores approximately 100...
In this work, self-organized titania nanotubes are sulfidated by an annealing treatment to produce TiOxSy nanotubes. Morphological, structural and electrochemical analyses show that 3D nanostructured electrode is a potential cathode material for Li-ion microbatteries.
Dyes are routinely used in the textile and pharmaceutical industries, causing serious environmental issues by decreasing water quality. Photocatalysts for dye degradation, different acting mechanisms may occur during photodegradation process. In this study, Ni nanoparticles were heated to selected temperatures up 500 °C under an ambient atmosphere subsequently supported on SrTiO3. The samples characterized X-ray diffraction, small-angle scattering, transmission electron microscopy,...
Galvanostatic tests with pure magnesium and the AZ91HP alloy were performed in NaCl solutions, volume of hydrogen evolved during was measured. In order to examine negative-difference effect, a concept developed separate evolution (H.E.) on passive surface H.E. inside pits. An analysis volumetric data showed that current density pits is much higher for Mg than alloy. With assumption, ratio between reduction rate anodic metal dissolution, expressed by factor k, does not change polarization, k...