The self-repairing polymer coating based on microencapsulated epoxy resin agent and catalyst was prepared. Defects in the coating were successfully healed when epoxy resin was released from the microcapsules, which were ruptured under simulated mechanical action. Polymer healed area was found to prevent corrosion of the substrate, which was analysed by scanning electron microscopy. The healing efficiency was determined using electrochemical impedance spectroscopy. The local corrosion activity of the damaged coating on the carbon steel was evaluated. The impedance spectroscopy of the self-healing coating showed measurable improvements of anticorrosion performance after defect creation.
WhiteS. R., SottosN. R., GeubelleP. H., MooreJ. S., KesslerM. R., SriramS. R., BrownE. N. and ViswanathanS.: ‘Autonomic healing of polymer composites’, Nature, 2001, 409, 794–797.
2.
GarcíaaS. J., FischerH. R., WhiteP. A., MardelJ., González-GarcíaeY.MolJ. M. C. and HughesA. E.: ‘Self-healing anticorrosive organic coating based on an encapsulated water reactive silyl ester: synthesis and proof of concept’, Prog. Org. Coat., 2011, 70, 142–149.
3.
RapsD., HackT., WehrJ., ZheludkevichM. L., BastosA. C., FerreiraM. G. S. and NuykenO.: ‘Electrochemical study of inhibitor-containing organic–inorganic hybrid coatings on AA2024’, Corros. Sci., 2009, 51, 1012–1021.
4.
KirkbyE. L., MichaudV. J., MansonJ. -AE, SottosN. R. and WhiteS. R.: ‘Performance of self-healing epoxy with microencapsulated healing agent and shape memory alloy wires’, Polymer, 2009, 50, 5533–5538.
5.
González-GarcíaY., MolJ. M. C., MuselleT., De GraeveI., van AsscheG., ScheltjensG., van MeleB. and TerrynH.: ‘SECM study of defect repair in self-healing polymer coatings on metals’, Electrochem. Commun., 2011, 13, 169–173.
6.
WilliamsK. A., DreyerD. R. and BielawskiC. W.: ‘The underlying chemistry of self-healing materials’, MRS Bull., 2008, 33, 759–765.
7.
van der ZwaagS.: ‘Self-healing materials: an alternative approach to 20 centuries of materials science’; 2007, Dordrecht, Springer.
8.
ChoS. H., WhiteS. R. and BraunP. V.: ‘Self-healing polymer coatings’, Adv. Mater., 2009, 21, 645–649.
9.
SuryanarayanaC., ChowdojiK. and KumarD.: ‘Preparation and characterization of microcapsules containing linseed oil and its use in self-healing coatings’, Prog. Org. Coat., 2008, 63, 72–78.
10.
ZhaoY., ZhangW., LiaoL. P., WangS. J. and LiW. J.: ‘Self-healing coatings containing microcapsule’, Appl. Surf. Sci., 2012, 258, 1915–1918.
11.
MookhoekS. D., BlaiszikB. J., FischerH. R., SottosN. R., WhiteS. R. and van der ZwaagS.: ‘Peripherally decorated binary microcapsules containing two liquids’, J. Mater. Chem., 2008, 18, 5390–5394.
12.
ChoS. H., AnderssonH. M., WhiteS. R., SottosN. R. and BraunP. V.: ‘Polydimethylsiloxane-based self-healing materials’, Adv. Mater., 2006, 18, 997–1000.
13.
BlasizikB. J., KramerS. L. B., OlugebefolaS. C., MooreJ. S., SottosN. R. and WhiteS. R.: ‘Self-healing polymers and composites’, Annu. Rev. Mater. Res., 2010, 40, 179–211.
