Active self-healing coating for galvanically coupled multi-material assemblies

authors	Serdechnova, M; Kallip, S; Ferreira, MGS; Zheludkevich, ML
nationality	International
journal	ELECTROCHEMISTRY COMMUNICATIONS
author keywords	Galvanic couple; CFRP; Al alloy; Self-healing coating; Nanocontainer; Synergistic inhibition
keywords	CORROSION PROTECTION; FILIFORM CORROSION; COATED AA2024-T3; INHIBITION; PIGMENTS; NANOCONTAINERS; ENVIRONMENT; COPPER; SVET; CELL
abstract	A new "self-healing" coating concept for active corrosion protection on galvanically coupled multi-material structures is reported in the present work. The novel approach is based on the combination of two types of nanocontainers with two different inhibitors in the same coating system. The nanocontainers confer a triggered release of both inhibitors which act in a synergistic way when an aluminum alloy is galvanically coupled with carbon fiber reinforced plastic. The layered double hydroxide and bentonite were used as functional nanocarriers for 1,2,3-benzotriazole and Ce3+ inhibitors respectively. Scanning vibrating electrode technique has been applied for the monitoring of galvanic corrosion activities and kinetics of self-healing processes in confined defects. The effective inhibition of electrochemical activity in the defects on coated galvanically coupled aluminum alloy with carbon fiber reinforced plastic was demonstrated for the first time. (C) 2014 Elsevier B.V. All rights reserved.
publisher	ELSEVIER SCIENCE INC
issn	1388-2481
year published	2014
volume	41
beginning page	51
ending page	54
digital object identifier (doi)	10.1016/j.elecom.2014.01.023
web of science category	Electrochemistry
subject category	Electrochemistry
unique article identifier	WOS:000333858100014