Corrosion protective properties of nanostructured sol-gel hybrid coatings to AA2024-T3

被引：227

作者：

Zheludkevich, ML ^{[1
]}

Serra, R

Montemor, MF

Salvado, IMM

Ferreira, MGS

机构：

[1] Univ Aveiro, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal

[2] ICEMS, Inst Super Tecn, Dept Chem Engn, P-1049001 Lisbon, Portugal

来源：

SURFACE & COATINGS TECHNOLOGY | 2006年 / 200卷 / 09期

关键词：

AA2024-T3; EIS; SKPFM; corrosion; nanostructured coating; sol-gel;

D O I：

10.1016/j.surfcoat.2004.09.007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The work aims at investigating the corrosion behavior of AA2024-T3 substrates pretreated with sol-gel derived hybrid coatings. The hybrid sols were prepared by copolymerization of 3-Glycidoxypropyltrimethoxysilane (GPTMS), tetraethylortosilicate (TEOS) and tetran-propoxyzirconium (TPOZ). Coatings with Zr/Si atomic ratios of 1:9 and 1:4 were also prepared. During the synthesis process, there is formation of ZrO2 nanoparticles, which content depends on the temperature and time of the TPOZ hydrolysis/condensation reactions. The results show that the ZrO2 nanoparticles have diameters ranging between 40 and 200 nm. These particles are amorphous and they improve the corrosion protection of the sol-gel coatings. The presence of ZrO2 nanoparticles seems to have a pore blocking effect in the coatings with higher content of particles. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：3084 / 3094

页数：11