Monodisperse Ag@SiO₂ Core-Shell Nanoparticles as Active Inhibitors for Marine Anticorrosion Applications

Authors: Zhang, Xin-Sheng; Wang, Jie-Xin; Xu, Ke; Le, Yuan; Chen, Jian-Feng

Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 4, April 2011 , pp. 3481-3487(7)

Publisher: American Scientific Publishers

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Abstract:

Monodisperse Ag@SiO₂ core-shell structured nanoparticles were firstly utilized as a novel corrosion inhibitor for marine anticorrosion applications. The related marine anticorrosion properties were evaluated with an electrochemical noise (ECN) analysis during 2 weeks of accelerated immersion tests in natural seawater with the addition of various inorganic salts and nutriments. The experimental results indicate that the corrosion activity is markedly reduced by nearly 1-3 orders of magnitude owing to the introduction of Ag@SiO₂ core-shell nanoparticles into coating. The inhibition efficiency of corrosion can reach as high as about 99%. More importantly, such a coating exhibits an excellent long-term sustained marine anticorrosion effect. So it could be reasonably inferred that silver cores as active inhibitors effectively prevent the corrosion damage from microorganisms, while silica shells act as a good protection for silver nanoparticles, delay the release of silver ions, and also function as the corrosion inhibiting action for inorganic salts. Therefore, this would make monodisperse Ag@SiO₂ core-shell nanoparticles a potential and promising corrosion inhibitor for developing future advanced multifunctional coatings.

Keywords: AG NANOPARTICLES; CORE-SHELL STRUCTURE; MONODISPERSE; MARINE ANTICORROSION; ELECTROCHEMICAL NOISE

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2011.3597

Publication date: 2011-04-01

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Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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