Analytical characterization of silane films modified with cerium activated nanoparticles and its relation with the corrosion protection of galvanised steel substrates

被引：103

作者：

Montemor, M. F. ^{[1
]}

Ferreira, M. G. S. ^{[1
,2
]}

机构：

[1] Univ Tecn Lisboa, ICEMS, Inst Super Tecn, P-1049001 Lisbon, Portugal

[2] Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal

来源：

PROGRESS IN ORGANIC COATINGS | 2008年 / 63卷 / 03期

关键词：

Silanes; Corrosion; SVET; SiO2; CeO2; Nanoparticles;

D O I：

10.1016/j.porgcoat.2007.11.008

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Galvanised steel substrates were pre-treated in bis-1,2-[triethoxysilyilpropyl]tetrasulphide silane solutions containing SiO2 or CeO2 nanoparticles activated with cerium ions. The surface composition was investigated by infrared spectroscopy. The film thickness was determined by scanning electron microscopy. The results showed that the barrier properties of silane films modified with nanoparticles depend upon the concentration of nanoparticles. The results also showed that the silane film thickness increases when the nanoparticles are activated with cerium ions. The anti-corrosion behaviour of the cerium activated nanoparticles was also investigated at the microscale level, in artificial induced defects, using the scanning vibrating electrode technique (SVET). The substrates treated with the silane coating modified with CeO2 nanoparticles revealed improved corrosion behaviour comparatively to the coatings modified with SiO2 nanoparticles. X-ray photoelectron spectroscopy and Auger electron spectroscopy experiments carried out on the defects after immersion in NaCl solutions revealed the presence of a surface film containing zinc corrosion products and cerium/ceria compounds. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：330 / 337

页数：8

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