The failure to promptly repair metal corrosion has become a major challenge in industrial applications. Electrospinning fibers have been extensively investigated as self-healing materials for metallic corrosion protection. However, their intrinsic high permeability and insufficient environmental durability have severely hindered further advancement, and enhancing structural stability and weather resistance remains a critical challenge. This work reported a strategy based on the synergistic integration of electro-spraying and electrospinning to fabricate anticorrosion coatings that exhibited efficient anti-aging and self-healing capabilities. Through this positive synergy, the electrospinning fibers incorporated ultraviolet absorption and provided a barrier to corrosive species. During salt-spray testing, the composite coating effectively blocked ingress of corrosive media, and the corroded area was substantially smaller than that observed on the blank epoxy coating. Salt-spray electrochemical impedance spectroscopy revealed that the impedance of the damaged composite coating exceeded that of the blank epoxy by two orders of magnitude, and self-healing of the damaged regions was accomplished within a short period. Furthermore, after a 300-h accelerated aging test, the ultraviolet absorption of the composite coating preserved its physicochemical properties and protective performance. These findings demonstrated that the proposed strategy significantly enhanced the practical utility of electrospinning self-healing coatings for corrosion protection, especially in complex environments. • Electrospinning-Electrospraying synergy for preparing self-healing/anti-aging coating. • Electrospinning controlled the release of corrosion inhibitors for self-healing. • Electrospraying enhanced the anti-UV aging ability. • Prepared coating exhibited anti-corrosion and anti-UV aging abilities.
Zhu et al. (Fri,) studied this question.