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A Smart Coating Embedded with pH-Responsive Nanocapsules Containing a Corrosion Inhibiting Agent – Changkyu Kim

A Smart Coating Embedded with pH-Responsive Nanocapsules Containing a Corrosion Inhibiting Agent – Changkyu Kim

Introduction

Changkyu KimTriethanolamine (TEA), an amine-based corrosion inhibitor, was encapsulated and then embedded into an epoxy coating to provide long-term corrosion protection of aluminum alloy 3003. TEA was encapsulated by means of free-radical polymerization, yielding an average particle size of 450 nm. An applied epoxy coating containing 10 wt % of the nanocapsules successfully protected an artificially defective area for a long period due to TEA adsorption, which resulted in the formation of an inhibiting layer. Electrochemical impedance spectroscopy showed an inhibition efficiency surpassing 85% when the metal experienced mild corrosion in its early stages, and the inhibiting layer started to form by local pH level change, which triggered the release of TEA. On the basis of the results of a scanning vibrating electrode technique, the current density of the metal surface in the presence of an encapsulated TEA coating was significantly lower than that of the control coating with no nanocapsules. Optical microscope and scanning electron microscope images revealed that the sample surface that had encapsulated TEA nearby was considerably less stained after 60 days of testing compared with that of the control sample, which indicated that the metal substrate was protected by an inhibiting layer. Elemental analysis performed by energy-dispersive X-ray spectroscopy further confirmed that the metal surface was well preserved, and a remarkably low oxygen content indicated suppressed metal oxidation. The nuclear magnetic resonance spectra also evidenced a successful release of TEA throughout the experimental period. These findings reflected a spontaneous surface repassivation with the help of encapsulated TEA coating.

 

Poster

Changkyu Kim Poster

Other Posters

  • Effect of Aging and Rejuvenation on the Rheological, Microscopic and Chemical Properties of Asphalt Binder Blends – Amal Abdelaziz
  • Balanced Mix Design Approach for Superpave Hot-Mix Asphalt (HMA) Mixtures with RAP – Haydar Al-Khayat
  • In Situ Resource Utilization and Reconfiguration of Soils Into Construction Materials for the Additive Manufacturing of Buildings – Aayushi Bajpayee
  • Evaluating the Performance of Wicking Geotextile in Providing Drainage for Flexible Pavements built over Expansive Soils – Nripojyoti Biswas
  • Eye in the Sky: Infrastructure Monitoring Using Unmanned Aerial Vehicles- Close Range Photogrammetry Technology – Surya Sarat Chandra Congress & Amit Gajurel
  • A Novel Model for Assessing SCC Susceptibility of Carbon Steel – Yuan Ding
  • Experimental and Analytical Assessment of Internal and Panel-to-Panel Cross-Laminated Timber Connections for Balloon-Style Construction – Ben Hayes
  • Stabilization of Sulfate-Rich Expansive Soils using Metakaolin-based Geopolymer – Jungyeon Jang
  • Performance of Geocell-Reinforced Recycled Asphalt Pavement (RAP) Bases in Flexible Pavements Built on Expansive Soils – Md Ashrafuzzaman Khan
  • A Smart Coating Embedded with pH-Responsive Nanocapsules Containing a Corrosion Inhibiting Agent – Changkyu Kim
  • Environmental Impact Assessment of Propylene Glycol – Prince Kumar
  • Re-Envisioning the Human-Built Environment Interface with Artificial Intelligence – Nipun Nath & CIBER Researchers
  • Biomimicry of Naturally Occurring Minerals to Develop Composites – Aditi Pandey & Paul Schwab
  • Privacy-Preserving Demand Response from Residential Thermal Loads – Sivaranjani Seetharaman & Iyke Idehen

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