Corrosion inhibition of magnesium by combined zirconia silica sol-gel films

被引：62

作者：

Tamar, Yair ^{[1
]}

Mandler, Daniel ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Dept Inorgan & Analyt Chem, IL-91904 Jerusalem, Israel

来源：

ELECTROCHIMICA ACTA | 2008年 / 53卷 / 16期

关键词：

magnesium; sol-gel; zirconia; silica; corrosion; thin films;

D O I：

10.1016/j.electacta.2008.02.029

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The inhibition of Mg (AZ91D) corrosion by thin sol-gel films was studied. The sol-gel films were prepared by the traditional acid or base-catalyzed hydrolysis and condensation, and finally deposited by dip coating. Two different sol-gel monomers were used: phenyltrimethoxysilane (PTMOS) and zirconium(IV)tetra-1-propoxide (ZrTPO). Films were made of each of the individual monomers and by depositing first a PTMOS film followed by ZrTPO-based film. The corrosion inhibition of the films and their characterization were examined by different methods including potentiodynamic polarization, contact angle measurement, adhesion test, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). We found that while the ZrTPO-based film did not show a significant corrosion inhibition, the PTMOS-based film provided moderate protection. Interestingly, the combined film exhibited superior corrosion inhibition as compared with the other films. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：5118 / 5127

页数：10

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