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Electrosprayed PLGA smart containers for active anti-corrosion coating on magnesium alloy Amlite

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journal contribution
posted on 2014-01-01, 00:00 authored by Jingyu Chen, X B Chen, Jingliang LiJingliang Li, Bin TangBin Tang, N Birbilis, Xungai Wang
A novel self-healing system, consisting of poly(lactic-co-glycolic) acid (PLGA) porous particles loaded with a corrosion inhibitor, i.e. benzotriazole (BTA), has been successfully achieved via direct electro-spray deposition and subsequent epoxy spraying upon magnesium (Mg) alloy AMlite. The two-step process greatly simplified the multi-step fabrication of smart coatings reported previously. The PLGA particles demonstrate rapid response to both water and pH increase incurred by corrosion of Mg, ensuring instant and ongoing release of BTA to self-heal the protective functionality and retard further corrosion. Furthermore, nanopores in the PLGA–BTA microparticles, formed by the fast evaporation of dichloromethane during the electrospray process, also contribute to the fast release of BTA. Using Mg alloy AMlite as a model substrate which requires corrosion protection, potentiodynamic polarisation characterisation and scratch testing were adopted to reveal the anti-corrosion capability of the active coating.

History

Journal

Journal of materials chemistry A

Volume

2

Issue

16

Pagination

5738 - 5743

Publisher

Royal Society of Chemistry

Location

London, Eng.

ISSN

2050-7496

Language

eng

Publication classification

C1 Refereed article in a scholarly journal; C Journal article

Copyright notice

2014, Royal Society of Chemistry