Cerium-loaded algae exoskeletons for active corrosion protection of coated AA2024-T3

Journal article (2017)

Authors

P.J. Denissen Novel Aerospace Materials - Aerospace Engineering
Santiago J. Garcia Novel Aerospace Materials - Aerospace Engineering
Research Group
Novel Aerospace Materials (Aerospace Engineering) (TU Delft)
Raman EIS Coating Cerium Diatomaceous Earth Inhibition AA2024 Anticorrosion Biosilica Corrosion Inhibitor Microcarrier
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Published Date

01-11-2017

Language

English

Reuse Rights

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Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Novel Aerospace Materials

Abstract

The use of micron sized nanoporous diatom algae exoskeletons for inhibitor storage and sustained corrosion protection of coated aluminium structures upon damage is presented. In this concept the algae exoskeleton allows local inhibitor loading, limits the interaction between the cerium and the epoxy/amine coating and allows for diffusion-controlled release of the inhibitor when needed. The inhibitor release and corrosion protection by loaded exoskeletons was evaluated by UV/Vis spectrometry, a home-built optical-electrochemical setup, and Raman spectroscopy. Although this concept has been proven for a cerium-epoxy-aluminium alloy system the main underlying principle can be extrapolated to other inhibitor-coating-metal systems.