EBS-TA@ZIF-67 Heterostructured Fillers for Enhanced Corrosion Protection and Fire Resistance of Waterborne Epoxy Coatings

Subsequently, the as-prepared BTZ was incorporated into the waterborne epoxy (WEP) to formulate the composite coating. It is found that the resulting composite coating, containing only 0.4 wt % BTZ, exhibits substantially enhanced overall performance.

Electrochemical testing reveals that after 42 days of exposure to 3.5 wt % NaCl solution, the |Z_{0.01 Hz}| value of the 4-BTZ/WEP coating increases by nearly 2 orders of magnitude relative to the neat WEP coating, highlighting its superior barrier capability. Furthermore, the peak heat release rate (PHRR) of the composite coating declines by 13.5% compared with the pristine WEP, reflecting markedly improved fire safety.