A5007306905- Corrosion Behavior and Inhibition
- Concrete Corrosion and Durability
- Metal and Thin Film Mechanics
- Electrodeposition and Electroless Coatings
- Hydrogen embrittlement and corrosion behaviors in metals
- Polymer composites and self-healing
- Mesoporous Materials and Catalysis
- Adsorption and biosorption for pollutant removal
- Crystallography and molecular interactions
- Natural Fiber Reinforced Composites
- Conducting polymers and applications
- Thermal and Kinetic Analysis
- Catalysis and Oxidation Reactions
- Polymer Science and Applications
- Bone Tissue Engineering Materials
- Antimicrobial agents and applications
- Phenothiazines and Benzothiazines Synthesis and Activities
- Aluminum Alloy Microstructure Properties
- Biofuel production and bioconversion
- Iron oxide chemistry and applications
- Diamond and Carbon-based Materials Research
- Tribology and Wear Analysis
- Nanocomposite Films for Food Packaging
- Dental materials and restorations
- Semiconductor materials and devices
Universidade de São Paulo
2020-2025
Universidade Cidade de São Paulo
2025
Universidade Federal de Minas Gerais
2023-2024
Universidade Federal de Viçosa
2015-2016
Electrochemical Impedance Spectroscopy (EIS) is a non-destructive and powerful technique for characterizing corrosion systems, allowing the evaluation of surface reaction mechanisms, mass transport, kinetic evolution, levels materials. This study aims to analyze progression using EIS, with focus on influence organic coating thickness. For this purpose, layers high-purity epoxy paint were applied carbon steel plates thicknesses 50 µm, 80 100 µm. During research, direct correlation was...
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Lumefantrine (LMF) is a low-solubility antimalarial drug that cures acute, uncomplicated malaria. It exerts its pharmacological effects against erythrocytic stages of Plasmodium spp. and prevents malaria pathogens from producing nucleic acid protein, thereby eliminating the parasites. Modifying structure through formation pharmaceutical cocrystal or salt presents an avenue which physicochemical properties can be optimized. In this work, we report design/synthesis solid-state characterization...
Acid baths containing sulfate still lack industrial purposes, although they are classified as low toxicity and represent smaller risks to the environment operators when compared traditional alkaline baths. So, influence of zinc concentration (Zn 2+ ), current density ( i), temperature T), pH levels were examined during Zn electroplating process in over efficiency, coating morphology, corrosion resistance. The efficiency decreased decreasing i (from 30.5 mA/cm 2 7.5 ). Increasing both T...
The reuse of an agricultural by-product in consense with the development green coatings, motivated characterization coconut fiber powder, as a renewable inhibitor pigment. Coconut microfibers are new, efficient, eco-friendly aim this work to homogenize particle size - MESH 250 -, was milled and sieved. powder underwent alkaline treatment, immersion sodium hydroxide solution NaOH 5% (w/w) for 24 h. morphological untreated microfiber (UM) treated (TM) were performed using laser diffraction...
This study aimed to characterize the immobilization of novel JIChis-2 peptide on Ti-6Al-4V alloy, widely used in biomedical sector. The antimicrobial activity was evaluated Gram-negative bacterium E. coli. Its occurred by inducing formation covalent bonds between N-terminus peptides and surface previously submitted acrylic acid polymerization via PECVD technique. Coated uncoated surfaces were characterized FTIR, AFM, SEM EDX. Studies global localized corrosion carried out, seeking explore...
The results of the corrosion tests, in chloride environment, lean duplex stainless steel UNS S32304 welded by submerged arc welding (SAW) process variant with cold wire, indicated that sample higher heat input (HI) (2.7 kJ/mm) had resistance, which can be explained amount austenite and lower precipitates. Therefore, indicate use HI above limit recommended literature (2.5 may produce welds adequate resistance SAW wire addition, because this technique has potential to deliver productivity...
Objetivo: Analisar a resistência à corrosão por pites dos aços inoxidáveis AISI 304 e 420 em meio contendo cloretos (solução de NaCl 0,9 3,5%, massa), assim como sua citotoxicidade,in vitro, amostras com sem pites. Método: Estudo experimental. Utilizaram-se técnicas polarização potenciodinâmica cíclica (PPC) para caracterizar extensão forma do ataque corrosivo nas amostras. O método difusão ágar avaliação da viabilidade linhagem celular NCTC clone 929 (CCIAL 020) foi empregado avaliar...
Nowadays, there has been an urgency in the search for sustainable energy sources, such as those derived from biomass. This is not only limited to minimizing greenhouse gas emissions but also related increasing scarcity of fossil fuels. work aims investigate and analyze production bio-hydrocarbons fatty acids through simulation deoxygenation reaction by DWSim software. In this simulation, a continuous catalytic reactor stirred tank with fluidized bed type was selected, aiming understand...
A água a ser utilizada em processos industriais demanda um tratamento e qualidade diferenciados. O objetivo desse estudo foi investigar o uso de três materiais celulósicos para abrandamento da água, sendo duas celuloses microcristalinas com granulometrias diferentes (CMC101 CMC500) polpa Kraft Eucalyptus branqueada. Realizou-se cinético obtenção parâmetros otimizados, determinaram-se isotermas adsorção, utilizando concentrações cálcio assumindo níveis pH. partir dos resultados, pode-se...
Nessa pesquisa, foram avaliadas diferentes concentrações do pó resíduo sólido da hidrodestilação folha de pimenta rosa (PRHPPL), gerado na produção seu óleo essencial, como inibidor para aço carbono em HCl 0,5 mol L-1. Esta avaliação foi realizada por meio espectroscopia impedância eletroquímica (EIS), polarização potenciodinâmica, técnica varredura eletrodo vibratório (SVET) e testes perda massa. Todos os mostraram que a maior concentração (1,77 g L-1) apresentou melhor eficiência; icorr,...