Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE A waterborne anti-corrosion coating was fabricated using organotitanium and TC4/TiO2 ultrafine powders. The organotitanium formed Ti-O-R bonds with both the substrate and the fillers, resulting in a cross-linked macromolecular network that stabilized the hybrid system. This coating demonstrated outstanding overall performance.

ABSTRACT
This study successfully developed a waterborne anti-corrosion coating composited with organotitanium and TC4/TiO2 ultrafine powders, and systematically investigated its microstructure, phase composition, and long-term anti-corrosion performance. The corrosion resistance was optimized by adjusting the ratios of TC4 and TiO2 and incorporating auxiliary fillers including organic titanium and carbon powder. The underlying mechanism was elucidated using SEM, TEM, EDS, XRD, FTIR, electrochemical tests, and salt spray testing. The optimized coating formulation was: 50 wt% epoxy resin, 7.5 wt% TC4 alloy, 8 wt% organic titanium, 5 wt% carbon powder, 7.5 wt% TiO2, 1 wt% dispersing agent, 1 wt% water, and 20 wt% curing agent. A synergistic effect among these components significantly reduced porosity and promoted the formation of a protective film. Furthermore, organic titanium formed TiOR bonds with the substrate and fillers, creating a cross-linked macromolecular network that stabilized the hybrid system. The optimized coating exhibited excellent performance, achieving Grade 1 adhesion, 6H hardness, and 50 kg·cm impact resistance. Salt spray testing revealed a corrosion resistance exceeding 720 h, which translates to a protective lifespan improvement of over 1.8 times compared to conventional waterborne epoxy coatings.