Abstract
Pyrolyzed and gasified biochar nanoparticles
(BCN) were manufactured and incorporated into a series of zinc epoxy
coatings to investigate how the anticorrosive performance is affected.
Electrochemical measurements were conducted to test the coating
alongside the exposure. Overall, BCN-modified formulations exhibited
enhanced barrier protection, especially on formulations with lower zinc
content (10 vol% and 22 vol%). More than 600 h of efficient galvanic
protection was found on the gasified BCN-modified formulation with
30 vol% zinc. BCN improved the zinc utilization rate as well, where the
unreacted zinc was reduced from ca. 50 wt% to ca. 20 wt% after 930 h of
immersion. Scanning electron microscopy and X-ray diffraction results
also verified the effects. The enhancement was attributed to the filling
of micropores and extra electrical connections provided by BCN. This
study imparts a sustainable solution for enhancing the anticorrosive
performance of zinc epoxy coatings.
Original language | English |
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Article number | 107477 |
Journal | Progress in Organic Coatings |
Volume | 178 |
Number of pages | 11 |
ISSN | 0033-0655 |
DOIs | |
Publication status | Published - 2023 |
Keywords
- Biochar nanoparticles
- Corrosion
- EIS
- Zinc epoxy coating