Influence of Embedded Nanocontainers on the Efficiency of Active Anticorrosive Coatings for Aluminum Alloys Part II: Influence of Nanocontainer Position

被引：78

作者：

Borisova, Dimitriya ^{[1
]}

Moehwald, Helmuth ^{[1
]}

Shchukin, Dmitry G. ^{[1
,2
]}

机构：

[1] Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany

[2] Univ Liverpool, Dept Chem, Stephenson Inst Renewable Energy, Liverpool L69 4ZF, Merseyside, England

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 01期

关键词：

silica; nanocontainer; corrosion inhibitor; sol-gel; self-healing; aluminum alloy; SOL-GEL COATINGS; SELF-HEALING COATINGS; CORROSION PROTECTION; ADHESION; INHIBITORS; AA2024-T3; CHROMATE;

D O I：

10.1021/am302141y

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The present work contributes to the coating design of active anticorrosive coatings for the aluminum alloy, AA2024-T3. Part II is a continuation of Part I: Influence of Nanocontainer Concentration and describes further surprising aspects of the design of nanocontainer based active anticorrosive coatings, which influence their performance. The studied coating system consists of a passive sol gel (SiOx/ZrOx) matrix and inhibitor (2-mercaptobenzothiazole) loaded mesoporous silica nanocontainers (MBT@NCs), which are dispersed only in half of the coating volume. Varying position and concentration of MBT@NCs the synergetic effect of inhibitor amount and path length on the metal surface were analyzed, considering the balance between optimum barrier properties, active protection and adhesion. The impact of MBT@NC position on passive and active corrosion resistance was investigated by electrochemical impedance spectroscopy and scanning vibrating electrode technique. Increasing the distance between MBT@NCs and metal surface led to better barrier properties but worse active corrosion inhibition. These findings improve the understanding of the factors influencing the overall performance of active anticorrosive coatings and enable the development of a coating system with optimum anticorrosion efficiency.

引用

页码：80 / 87

页数：8

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