Sol-gel coatings modified with zeolite fillers for active corrosion protection of AA2024

被引：140

作者：

Dias, S. A. S. ^{[1
,2
]}

Lamaka, S. V. ^{[2
]}

Nogueira, C. A. ^{[1
]}

Diamantino, T. C. ^{[1
]}

Ferreira, M. G. S. ^{[2
,3
]}

机构：

[1] Lab Nacl Energia & Geol LNEG, P-1649038 Lisbon, Portugal

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

[3] Univ Aveiro, DECV, CICECO, P-3810193 Aveiro, Portugal

来源：

CORROSION SCIENCE | 2012年 / 62卷

关键词：

Aluminium; Rare earth elements; EIS; SEM; X-ray diffraction; Pitting corrosion; COATED ALUMINUM-ALLOY; LOCALIZED CORROSION; INHIBITION; RESERVOIRS; DEPOSITION; PIGMENTS; RELEASE;

D O I：

10.1016/j.corsci.2012.05.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work presents a new approach to develop active protection coating systems. Zeolite microparticles were used as reservoirs for Ce (III). The zeolites were introduced into silica-zirconia sol-gel films, improving the barrier properties of the coating and conferring active corrosion protection to the AA2024 substrate. The corrosion process changes the pH of solution locally causing release of inhibitor that precipitates in the cathodic areas. Intermetallic inclusions seem to be sites prone to the formation of these cerium rich precipitates. The protection properties of the modified coatings were assessed using EIS. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：153 / 162

页数：10

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