SECM study of defect repair in self-healing polymer coatings on metals

被引：86

作者：

Gonzalez-Garcia, Y. ^{[1
]}

Mol, J. M. C. ^{[1
]}

Muselle, T. ^{[2
]}

De Graeve, I. ^{[2
]}

Van Assche, G. ^{[3
]}

Scheltjens, G. ^{[3
]}

Van Mele, B. ^{[3
]}

Terryn, H. ^{[2
]}

机构：

[1] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands

[2] Vrije Univ Brussel, Grp Electrochem & Surface Engn, B-1050 Brussels, Belgium

[3] Vrije Univ Brussel, Grp Phys & Polymer Sci, B-1050 Brussels, Belgium

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2011年 / 13卷 / 02期

关键词：

Self-healing; Scanning electrochemical microscopy; Organic coatings; Shape-memory polymer; SCANNING ELECTROCHEMICAL MICROSCOPY; ELECTROLYTE IMMERSION; DEGRADATION PROCESSES; CORROSION-INHIBITORS; IN-SITU; STEEL;

D O I：

10.1016/j.elecom.2010.12.005

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this paper the local healing efficiency of shape-memory polymers as a new alternative for the protection against corrosion of damaged coated metals is studied by scanning electrochemical microscopy (SECM). These measurements allowed us to evaluate the local corrosion activity at a damaged self-healing polymer coating on an aluminum alloy before and after the thermally healing process of the shape-memory polymer film. SECM operating in redox-competition mode is applied to monitor in situ the reduction of oxygen as a cathodic process in the corrosion onset at a coating defect as a function of exposure time in 0.05 M NaCl solution. It is proven that the physical repair of the film in the defect leads to a recovery of the local barrier properties of the coated system and subsequent protection of the aluminum alloy. Published by Elsevier B.V.

引用

页码：169 / 173

页数：5

共 27 条

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