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

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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; ELECTROCHEMICAL NOISE; MARINE ANTICORROSION; MONODISPERSE

Document Type: Research Article

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

Publication date: April 1, 2011

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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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