title: Monodisperse Ag@SiO2 core-shell nanoparticles as active inhibitors for marine anticorrosion applications.
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.
authors.affiliation: Key Lab for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, P.R. China.
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Zhang
authors.forename: Jie-Xin
authors.initials: JX
authors.lastname: Wang
authors.forename: Ke
authors.initials: K
authors.lastname: Xu
authors.forename: Yuan
authors.initials: Y
authors.lastname: Le
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Chen
mesh_terms: D003343:Corrosion; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D009792:Oceans and Seas; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D012834:Silver; D012822:Silicon Dioxide