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Encapsulated Corrosion Inhibitive Pigment for Smart Epoxy Coating Development: An Investigation of Leaching Behavior of Inhibitive Ions.
- Source :
-
ACS omega [ACS Omega] 2023 Apr 11; Vol. 8 (16), pp. 14420-14429. Date of Electronic Publication: 2023 Apr 11 (Print Publication: 2023). - Publication Year :
- 2023
-
Abstract
- 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 <superscript>9</superscript> Ω·cm <superscript>2</superscript> compared to 1.1 × 10 <superscript>6</superscript> Ω·cm <superscript>2</superscript> and 2.6 × 10 <superscript>6</superscript> Ω·cm <superscript>2</superscript> for the conventional epoxy coatings pigmented with 3 wt % and 5 wt % calcium phosphate (CP3% and CP5%), respectively.<br />Competing Interests: The authors declare no competing financial interest.<br /> (© 2023 The Authors. Published by American Chemical Society.)
Details
- Language :
- English
- ISSN :
- 2470-1343
- Volume :
- 8
- Issue :
- 16
- Database :
- MEDLINE
- Journal :
- ACS omega
- Publication Type :
- Academic Journal
- Accession number :
- 37125122
- Full Text :
- https://doi.org/10.1021/acsomega.2c07853