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- Title
OBTENÇÃO E CARACTERIZAÇÃO DE SUPERFÍCIE SELETIVA COM DEPÓSITOS METÁLICOS DE NÍQUEL.
- Authors
de Sousa, Márcia Cristina; Oliveira Vilar, Eudésio; Dias Nery, Katya; Alecrim Sobreira, Henryli
- Abstract
For this study, a selective surface composed of nickel (bright - smoked) deposited on 304 stainless steel substrate was developed, us in electroplating, electroplating. The characteristic feature of this surface is high absorption of energy from solar radiation, where a prototype Industrial Solar Collector is used in the conversion of this energy to thermal energy; The Solar Collector is formed by the parabolic trough and na energy concentrator tube, which has its applicability in promoting heat transfer, providing viability in the capture and efficient retention of espectral radiation. In this work the aimis to simulate the surface of the concentrator tube in samples, laboratory scale. This work was subdivided in two stages: the first step with the electro plating process applied to the substrate in which a layer of Nickel Brilliant - NB was electrodeposited, varying the thickness of 1 to 15 μm, and a second layer by immersion of the nickel metal bath Fumé - NF. The second step with the characterization of the galvanized surface with the technique of absorbance readings of the radiation by FTIR Spectrophotometry, obtaining images amplified with the technique Optical Microscopy, and the processing of the amplified images with the technique of Quantification of phases of the metal with the IMAGO software. At the end of the study, it was observed that the lower the thickness the greater the porosity fraction of the NB, the better the adsorption of the metallic layer of the NF, thus promoting high absorbance indexes of the spectral radiation.
- Subjects
SOLAR collectors; PARABOLIC troughs; SOLAR energy; HEAT; SOLAR radiation; NICKEL-plating; COMPOUND parabolic concentrators
- Publication
Tecnologia em Metalurgia, Materiais e Mineração, 2018, Vol 15, Issue 4, p441
- ISSN
2176-1515
- Publication type
Article
- DOI
10.4322/2176-1523.20181621