Long-Term Active Corrosion Protection of Damaged Coated-AA2024-T3 by Embedded Electrospun Inhibiting Nanonetworks
Autor: | Christian D. Dieleman, Santiago J. Garcia, Paul J. Denissen |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
Materials science
Thermosetting polymer corrosion protection 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Chloride Polyvinyl alcohol Corrosion Corrosion inhibitor chemistry.chemical_compound Coating medicine electrospinning aluminum alloys Mechanical Engineering Epoxy 021001 nanoscience & nanotechnology Electrospinning 0104 chemical sciences cerium chemistry Chemical engineering Mechanics of Materials lithium visual_art engineering visual_art.visual_art_medium 0210 nano-technology medicine.drug |
Zdroj: | Advanced Materials Interfaces, 5(12) |
Popis: | In this work, a new concept is introduced for active corrosion protection at damaged sites aiming at overcoming existing limitations of currently proposed strategies based on dispersed inhibitor-loaded nanocontainers in coatings. The underlying principle is based on the formation of low-density and/or humidity responsive interconnected paths of inhibitor in the coating, what is called inhibiting nanonetworks. Such an approach allows for (on-demand) long-term local supply of corrosion inhibitor at the damage site. For the proof-of-concept, water responsive inhibiting nanonetworks based on polyvinyl alcohol and two known efficient corrosion inhibitors for AA2024-T3 (cerium chloride and lithium carbonate) using electrospinning are developed. The inhibiting nanonetworks are obtained by subsequently embedding the electrospun fiber mats in thermoset epoxy coatings applied on AA2024-T3. The coated panels are scratched and exposed to NaCl solutions for a month while continuously monitoring the protective properties electrochemically and optically in a hyphenated setup. The effect of the corrosion inhibitor type and the partial crosslinking of the mat on release and protection are analyzed. Protection levels at relatively big damaged sites are obtained for at least a month immersion thereby proving the benefits of high inhibitor quantities continuously released in time. |
Databáze: | OpenAIRE |
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