Effects of Ce-containing sol-gel coatings reinforced with SiO2 nanoparticles on the protection of AA2024

被引：137

作者：

Rosero-Navarro, N. C. ^{[1
]}

Pellice, S. A. ^{[1
]}

Duran, A. ^{[1
]}

Aparicio, M. ^{[1
]}

机构：

[1] Inst Ceram & Vidrio, CSIC, Madrid 28049, Spain

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 05期

关键词：

rare earth elements; aluminium; EIS; sol-gel; hybrid coatings;

D O I：

10.1016/j.corsci.2008.01.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A hybrid organic-inorganic self-healing coating for anticorrosive protection of AA2024 was developed through the sol-gel method. Combination of permeability, provided by a methacrylate-silica hybrid matrix, with hardness and density of silica nanoparticles, allowed obtaining a coating material where the diffusion of Ce ions occurred at the same time that an anticorrosive physical barrier was developed. Electrochemical impedance spectra (EIS) on coated samples showed an increase of the impedance modulus at 0.01 Hz as a function of immersion time in a 3.5 wt% NaCl solution. Self-healing effect was verified by impedance fitting through the evolution of resistive and capacitive parameters of the equivalent circuits. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1283 / 1291

页数：9

共 32 条

[1] Studies of the formation of cerium-rich protective films using x-ray absorption near-edge spectroscopy and rotating disk electrode methods [J].