Corrosion protection of AA2024-T3 by LDH conversion films. Analysis of SVET results

被引：99

作者：

Tedim, J. ^{[1
,2
]}

Bastos, A. C. ^{[1
,2
]}

Kallip, S. ^{[1
,2
]}

Zheludkevich, M. L. ^{[1
,2
,3
]}

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

机构：

[1] CICECO Aveiro Inst Mat, Dept Engn Mat & Ceram, P-3810193 Aveiro, Portugal

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

[3] Ctr Mat & Coastal Res GmbH, Inst Mat Res, Helmholtz Zentrum Geesthacht, Max Planck Str 1, D-21502 Geesthacht, Germany

来源：

ELECTROCHIMICA ACTA | 2016年 / 210卷

基金：

欧盟地平线“2020”;

关键词：

SVET; 2024-T3 aluminium alloy; neutral inhibition; pitting corrosion; LDH films; ALUMINUM-ALLOY; INHIBITION; AL; CHROMATE; 2024-T3;

D O I：

10.1016/j.electacta.2016.05.134

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this work the protective effect of layered double hydroxide (LDH) films directly grown on the surface of 2024-T3 aluminium alloy is investigated using electrochemical impedance spectroscopy (EIS) and the scanning vibrating electrode technique (SVET). The SVET results focused on the localised nature of the corrosion process and are in agreement with the global response measured by EIS. Furthermore, the evolution of active corrosion protection rendered by LDH films is surveyed at microscale for the first time for long immersion periods in NaCl solution and in the presence of induced defects. The quantitative information provided by SVET is discussed and a parameter to describe the degree of corrosion localisation is introduced based on LDH systems. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：215 / 224

页数：10

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