Protective coatings are used as a corrosion mitigation strategy in many industries. However, damages on transport, installation, and during the service life can expose the metal, leading to failures. Self–healing materials can address this issue by recovering their properties and functionality post-damage. Herein, it was developed an extrinsic self-healing coating by incorporating core–shell nanofibers obtained by coaxial electrospinning. Overcoming the non–spinnability of organosilane compounds, a one–trigger component healing agent was achieved. Additionally, scalability limitations for self-healing coatings were defeated by implementing a viable technique for large-scale structures – Spray painting. The final protective and healing behaviour was investigated by electrochemical and salt spray tests. Following damage, the immediate healing response reached 97.5 %, initiated solely by water. Low capacitance values for the developed coating indicated a robust protective barrier. Furthermore, the self-healing coating efficiently protected steel from corrosion in the salt spray test. The results obtained showed a promising future in using core–shell nanofibers to enhance the durability and protective capabilities of coatings for offshore facilities.

中文翻译：

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用于海上结构腐蚀防护涂层的自修复核壳纳米纤维

在许多行业中，防护涂层被用作缓蚀策略。然而，运输、安装和使用寿命期间的损坏可能会暴露金属，导致故障。自修复材料可以通过在损坏后恢复其特性和功能来解决这个问题。在此，通过掺入同轴静电纺丝获得的核壳纳米纤维，开发了一种外在自修复涂层。克服了有机硅烷化合物的不可纺性，实现了单触发组分修复剂。此外，通过对大型结构实施可行的技术——喷涂，克服了自修复涂层的可扩展性限制。通过电化学和盐雾测试研究了最终的保护和愈合行为。受损后，仅通过水即可立即治愈反应达到 97.5%。所开发涂层的低电容值表明其具有坚固的保护屏障。此外，自修复涂层在盐雾试验中有效保护钢材免受腐蚀。获得的结果表明，使用核壳纳米纤维来提高海上设施涂层的耐用性和保护能力具有广阔的前景。