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RESUMOTeste de Impacto do Martelo aplicado na Deteccão de Incrustação em Tubulações A detecção da incrustação em sistemas de dutosé um problema persistente e requer uma demanda pertinente para as indústrias químicas, petrolíferas, alimentícias e farmacêuticas. A incrustaçãoé um processo de deposicão de materiais sólidos dissolvidos orgânicos e outros materiais pesados nos fluidos transportados ou em suspensão sobre as superfícies das paredes internas em sistemas de transporte de fluidos. Este trabalho apresenta resultados da pesquisa de excitação do teste do martelo para análise de vibrações utilizando testes não-invasivos para detecção de incrustação em tubulações. Dados da vibração foram analizados na presença de uma camada de incrustação no interior dos tubos usando um acelerometro e um microfone para detecção. Com a aná-lise dos resultados obtidosé possível detectar o processo de incrustação, nas tubulações monitoradas, com e sem condições de carga, utilizando um microfone e um acelerômetro como sensores. ABSTRACTThe fouling detection in duct systems is a persistent problem and remains a relevant demand for the chemical, oil, food and pharmaceutical industries. The fouling is a deposition process of heavy organic and other dissolved solid materials in the transported fluids or suspensions onto inner wall surfaces in fluid transport systems. This work presents research results of hammer test for vibration analysis using non-invasive tests to fouling detection in pipelines. Data were taken from the vibration in presence of an inner pipe fouling layer using an accelerometer and a microphone for detection. With the analysis of the obtained results is possible to detect the fouling process, in the monitored pipelines, with and without load conditions, using a microphone and an accelerometer as sensors.

Zr(N)O coatings being synthesized by cathodic arc evaporation (P3e™ technology) show that cubic zirconia, ZrO2, can be formed at low substrate temperatures of 550 °C using nitrogen‐oxygen reactive gas mixtures during deposition. The structural properties of the coatings obtained for different nitrogen‐oxygen ratios have been investigated by X‐Ray Diffraction (XRD) techniques. The composition of the layers was studied by RBS and ERDA and the layers morphology by cross sectional SEM. For low oxygen flows, the cubic ZrN and ZrO phase were formed while increased oxygen flow results in a transition starting from the orthorhombic to the cubic and to the monoclinic ZrO2 phase. The phase stability of the cubic ZrO2 phase has been investigated by in situ high temperatures XRD studies in air and reveals a multi step phase transformation starting at about 550 °C with a change to the tetragonal ZrO2 phase and the further transition to the monoclinic phase at higher temperatures.

A numerical simulation tool is reported for nanometer thin and inhomogeneous immobilized protein films on gold in aqueous solution. It allows for the first time, to the best of our knowledge, the simultaneous assessment of refractive index, film thickness, and surface coverage. The model relies on and combines the convective diffusion equation, the Langmuir adsorption isotherm, and the Helmholtz equation, with appropriate boundary conditions. These three differential equations were jointly solved using a multiphysics software. The physical film parameters were extracted employing an optimization procedure for immobilized bovine serum albumin, hemoglobin, and neutravidin films. The relatively good agreement between the extracted values for the refractive index, film thickness, and surface coverage and the corresponding values reported in the open literature show the correctness of the proposed methodology.