Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EVALUATION OF OPTICAL AND MICROSTRUCTURAL CHARACTERISTICS OF CHROME ABSORBING FILMS
Submission Author:
Aline Karla Barbosa da Silva , PB
Co-Authors:
Ithyara Medeiros, Aline Karla Barbosa da Silva, Kelly Cristiane Gomes, Aline da Silva Oliveira, Gabriela Galvão
Presenter: Aline Karla Barbosa da Silva
doi://10.26678/ABCM.COBEM2019.COB2019-1895
Abstract
The most commonly used energy sources today are non-renewable energy sources, which contribute to the greenhouse effect. Renewable energies are shown as alternative to conventional sources, among them is solar energy, solar thermal being one of the ways to use this energy, where the radiation is used for the heating of fluids, through technologies of solar concentration or in Solar collectors plan to heat water up to medium temperatures. This work had as objective to produce and characterize selective surfaces of black chrome for the application in solar collectors. To perform the present study, the electrodeposition technique was used, varying the residence time in the electrolytic solution. The manufactured coatings were characterized by the techniques of X-ray Diffraction and Spectrophotometry in the region of Ultraviolet-Visible and Near Infrared (UV-Visible-NIR). The microstructural characterization showed the presence of more than one type of chromium oxide in the absorber films, whereas the optical evaluation allowed to determine that the time in the electrodeposition process has a great influence on the films' absorptance, since those with smaller times, except for 30 seconds and 1 minute, had higher absorptance.
Keywords
electrodeposition, black chrome, selective surface
