RT info:eu-repo/semantics/bachelorThesis
T1 Caracterización de la corrosión del cobre en medios fisiológico simulados por técnicas electroquímicas
A1 Rodrigues Gomes, Venulda Sofia
K1 Dispositivo intrauterino de cobre, Corrosión, Polarización electroquímica
AB The copper-containing intrauterine device is the reversible long-term contraceptive methodmost widely used around the World. Both, contraceptive action and side effects areattributed to the Cu2+ ions release resulting from a corrosion mechanism.In order to evaluate the corrosion resistance of copper, an electrochemical study of thismetal has been performed in a simulated intrauterine environment (38 ºC) at different pHconditions, using polarization techniques and surface analysis. The corrosion productsresulting from a prolonged exposure in the simulated solution were also identified byscanning electron microscopy and X-ray energy dispersive spectroscopy (SEM-EDX).The results revealed that, although there is a significant initial release of Cu2+ ions, inparticular under acidic environment, a layer of copper oxides develops on the surface withthe elapse of time, providing anti-corrosive protection. After several days/weeks ofimmersion in the aggressive solution, this insulating layer, formed by multilayers of patinaswith inclusions and ions from the simulated intrauterine solution, offers some protectionagainst further degradation, thereby diminishing but not totally impeding the materialdegradation and the release of copper.
YR 2019
FD 2019
LK http://riull.ull.es/xmlui/handle/915/16043
UL http://riull.ull.es/xmlui/handle/915/16043
LA es
DS Repositorio institucional de la Universidad de La Laguna
RD 24-nov-2024