Utilização de polianilina como revestimento protetor contra corrosão das ligas de alumínio 2014 F, 2024 T3 e 7075 O

Fontana, Álvaro

doi:10.11606/d.75.2007.tde-25102007-165457

Cited by 1 publication

(2 citation statements)

References 25 publications

(32 reference statements)

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“…In this way, the use of protective coatings appears as a possible alternative against the advancement of the corrosion process of the AA2524-T3 alloy. In this context, chromatization is the most effective conversion coating for Al-alloys 22 . However, the tailings from the treatment process are highly toxic, which makes their use unfeasible 22 .…”

Section: Introductionmentioning

confidence: 99%

“…In this context, chromatization is the most effective conversion coating for Al-alloys 22 . However, the tailings from the treatment process are highly toxic, which makes their use unfeasible 22 . Several reports have shown that conductive polymers can be useful in corrosion protection as a form of coating onto metals and metal alloys by using electrochemical deposition techniques 5,[23][24] .…”

Section: Introductionmentioning

confidence: 99%

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Corrosion and Micro-abrasive Wear Behaviour of 2524-T3 Aluminium Alloy with PAni-NPs/PSS LbL Coating

et al. 2019

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In this paper, we present an alternative method to obtain thin films for coating protection on the surface of the AA2524-T3 Al-alloy by using the Layer-by-Layer (LbL) technique. The LbL films were fabricated by alternated immersion of the Al-alloy into a poly(styrene sulfonate) (PSS) and polyaniline nanoparticles (PAni-NPs) solutions, obtaining a PAni-NPs/PSS bilayer architecture. The LbL films were characterized by ultraviolet-visible spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), electrochemical and micro-abrasive wear tests. The results show that the number of bilayers promotes shifts to less negative potentials, indicating an optimized system, in which the best performance was observed for a 15-bilayer PAni/PSS LbL film. The pitting potential (E pit) values shifted 130 mV (from-610 mV to-480 mV) in comparing a bare Al-alloy. The predominantly wear mechanism for AA2524-T3 with PAni-NPs/PSS bilayers was scratching whereas for the bare material there was an equivalence between scratching and rolling mechanisms. The results proved that the incorporation of PAni-NPS by the LbL method may be propitious as protective coating against corrosion in AA2524-T3 alloy.

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Section: Introductionmentioning

confidence: 99%