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Encapsulated Corrosion Inhibitive Pigment for Smart Epoxy Coating Development: An Investigation of Leaching Behavior of Inhibitive Ions

[Image: see text] A comparative study between the leaching behavior of inhibitive ions from conventionally pigmented and smart (with encapsulated pigments) epoxy coatings has been conducted. Leaching of calcium phosphate as an inhibitive pigment from epoxy coatings was tested in 3.5 wt % NaCl soluti...

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Autores principales: Lamprakou, Zoi, Bi, Huichao, Weinell, Claus Erik, Dam-Johansen, Kim
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10134293/
https://www.ncbi.nlm.nih.gov/pubmed/37125122
http://dx.doi.org/10.1021/acsomega.2c07853
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author Lamprakou, Zoi
Bi, Huichao
Weinell, Claus Erik
Dam-Johansen, Kim
author_facet Lamprakou, Zoi
Bi, Huichao
Weinell, Claus Erik
Dam-Johansen, Kim
author_sort Lamprakou, Zoi
collection PubMed
description [Image: see text] A comparative study between the leaching behavior of inhibitive ions from conventionally pigmented and smart (with encapsulated pigments) epoxy coatings has been conducted. Leaching of calcium phosphate as an inhibitive pigment from epoxy coatings was tested in 3.5 wt % NaCl solution. The results showed that pigment encapsulation contributed to a more uniform and stable coating microstructure based on the Scanning Electron Microscopy–Energy-Dispersive X-ray Spectroscopy (SEM-EDX) analysis and a higher leaching rate of the inhibitive pigment via the Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) analysis, thereby enhancing both the active corrosion protection and the barrier properties of the coating film. This was further verified by the Electrochemical Impedance Spectroscopy (EIS) measurements. After 7 days of immersion in 3.5 wt % NaCl solution, the coating resistance of the smart epoxy coating with mesoporous silica nanoparticle encapsulated calcium phosphate (MSN-CP3%) was 2 × 10(9) Ω·cm(2) compared to 1.1 × 10(6) Ω·cm(2) and 2.6 × 10(6) Ω·cm(2) for the conventional epoxy coatings pigmented with 3 wt % and 5 wt % calcium phosphate (CP3% and CP5%), respectively.
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spelling pubmed-101342932023-04-28 Encapsulated Corrosion Inhibitive Pigment for Smart Epoxy Coating Development: An Investigation of Leaching Behavior of Inhibitive Ions Lamprakou, Zoi Bi, Huichao Weinell, Claus Erik Dam-Johansen, Kim ACS Omega [Image: see text] A comparative study between the leaching behavior of inhibitive ions from conventionally pigmented and smart (with encapsulated pigments) epoxy coatings has been conducted. Leaching of calcium phosphate as an inhibitive pigment from epoxy coatings was tested in 3.5 wt % NaCl solution. The results showed that pigment encapsulation contributed to a more uniform and stable coating microstructure based on the Scanning Electron Microscopy–Energy-Dispersive X-ray Spectroscopy (SEM-EDX) analysis and a higher leaching rate of the inhibitive pigment via the Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) analysis, thereby enhancing both the active corrosion protection and the barrier properties of the coating film. This was further verified by the Electrochemical Impedance Spectroscopy (EIS) measurements. After 7 days of immersion in 3.5 wt % NaCl solution, the coating resistance of the smart epoxy coating with mesoporous silica nanoparticle encapsulated calcium phosphate (MSN-CP3%) was 2 × 10(9) Ω·cm(2) compared to 1.1 × 10(6) Ω·cm(2) and 2.6 × 10(6) Ω·cm(2) for the conventional epoxy coatings pigmented with 3 wt % and 5 wt % calcium phosphate (CP3% and CP5%), respectively. American Chemical Society 2023-04-11 /pmc/articles/PMC10134293/ /pubmed/37125122 http://dx.doi.org/10.1021/acsomega.2c07853 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Lamprakou, Zoi
Bi, Huichao
Weinell, Claus Erik
Dam-Johansen, Kim
Encapsulated Corrosion Inhibitive Pigment for Smart Epoxy Coating Development: An Investigation of Leaching Behavior of Inhibitive Ions
title Encapsulated Corrosion Inhibitive Pigment for Smart Epoxy Coating Development: An Investigation of Leaching Behavior of Inhibitive Ions
title_full Encapsulated Corrosion Inhibitive Pigment for Smart Epoxy Coating Development: An Investigation of Leaching Behavior of Inhibitive Ions
title_fullStr Encapsulated Corrosion Inhibitive Pigment for Smart Epoxy Coating Development: An Investigation of Leaching Behavior of Inhibitive Ions
title_full_unstemmed Encapsulated Corrosion Inhibitive Pigment for Smart Epoxy Coating Development: An Investigation of Leaching Behavior of Inhibitive Ions
title_short Encapsulated Corrosion Inhibitive Pigment for Smart Epoxy Coating Development: An Investigation of Leaching Behavior of Inhibitive Ions
title_sort encapsulated corrosion inhibitive pigment for smart epoxy coating development: an investigation of leaching behavior of inhibitive ions
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10134293/
https://www.ncbi.nlm.nih.gov/pubmed/37125122
http://dx.doi.org/10.1021/acsomega.2c07853
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