Study of the effect of electrodeposition of Ag and Cu ions on previously modified surfaces of AISI 304 steel on its susceptibility to antimicrobial inhibition
DOI:
https://doi.org/10.37636/Keywords:
Electroplating, Metal ions, Biofouling, BiofilmsAbstract
Preventing biofouling in different aqueous environments, without introducing toxic substances into the environment, has driven the development of new research. The application of nanotechnology in biofouling protection has been promoted in various fields. In the present work, the mechanism involved in the formation of biofilms on AISI 304 stainless steel previously modified with metal ion deposits (Ag and Cu) was studied. The modified surfaces were characterized by various techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), contact angle and roughness. Likewise, the microbial activity of the substrates with Ag and Cu electrodeposits was evaluated according to ASTM E2562-12. SEM micrographs showed the morphology of the copper and silver coatings on the stainless-steel surface, where the formation of a homogeneous and well-distributed deposit of Cu and Ag nanoparticles was observed. The composition of these nanoparticles was confirmed by EDS analysis. XRD analysis confirmed the presence of Ag and Cu in addition to Fe-γ austenite (FCC) on the surface. This expanded austenite provides high resistance to wear and corrosion. On the other hand, the surfaces with the silver deposit showed a decrease in antimicrobial activity, this is because silver interferes with cellular metabolism either by breaking the cell wall or causing genetic alterations in the bacteria that lead to its death.
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