Active sensing coating for early detection of corrosion processes

被引：56
|
作者：
Maia, Frederico [1 ]
Tedim, Joao [1 ]
Bastos, Alexandre C. [1 ]
Ferreira, Mario G. S. [1 ]
Zheludkevich, Mikhail L. [1 ,2 ]
机构：
[1] Univ Aveiro, Dept Mat & Ceram Engn DEMaC, CICECO, P-3810193 Aveiro, Portugal
[2] Helmholtz Zentrum Geesthacht, Inst Mat Res, Magnesium Innovat Ctr MagIC, D-21502 Geesthacht, Germany
来源：
RSC ADVANCES | 2014年 / 4卷 / 34期
关键词：
PERFORMANCE;
D O I：
10.1039/c4ra00826j
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A corrosion sensing coating based on specially developed polymeric microcapsules with a pH-indicator is reported. The synthesis of the microcapsules is designed in a way to ensure their optimal compatibility with the polyurethane protective coatings and to allow release of the indicator at higher pH values. The obtained polyurea microcapsules have a regular and microsized morphology and a loading content of 12 wt%. The developed sensing coating applied on aluminium and magnesium alloys is able to indicate initiation of corrosion processes through a pink coating coloration, as a result of local pH increase in the cathodic areas.
引用
收藏
页码：17780 / 17786
页数：7
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