Corrosion protection properties of hydroxamic acid self-assembled monolayer on carbon steel

被引：108
|
作者：
Alagta, Abdulmajed [1 ]
Felhosi, Ilona [1 ]
Bertoti, Imre [2 ]
Kalman, Erika [1 ]
机构：
[1] Hungarian Acad Sci, Chem Res Ctr, Dept Surface Modificat & Nanostruct, H-1025 Budapest, Hungary
[2] Hungarian Acad Sci, Chem Res Ctr, Inst Mat & Environm Chem, H-1025 Budapest, Hungary
来源：
CORROSION SCIENCE | 2008年 / 50卷 / 06期
关键词：
hydroxamic acid; EIS; XPS; SAMs; inhibition in neutral solutions;
D O I：
10.1016/j.corsci.2008.02.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Self assembled monolayers (SAMs) of hydroxamic acids CH3(CH2)(n)CONHOH with different alkyl length were formed on the carbon steel electrode surface. The corrosion protection properties of the monolayers were examined and characterized by electrochemical polarization curves, electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy (XPS) and contact angle measurements. XPS results showed that the hydroxamic acid molecules adsorbed on the carbon steel surface, and the contact angle values on the modified surface supported the formation of hydrophobic hydroxamic acid SAMs. The results of electrochemical studies showed that the values of the corrosion potential shift towards the positive direction, and anodic currents of the carbon steel dissolution significantly decreases, indicating that hydroxamic acids are anodic inhibitors. However, the chain length and assembling time influence the protection efficiency. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1644 / 1649
页数：6
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