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Inspired by the self\u2010healing process of damaged skin tissue, we report an extrinsic\u2010intrinsic time\u2010sequential gradient cooperative self\u2010healing anti\u2010corrosion coating, fabricated by embedding curcumin\u2010loaded graphene oxide\/ZIF\u20108 (GO\/ZIF\u20108@CCM) nanosheets into a tough polyurethane\/epoxy covalent dynamic network. By precisely regulating the distribution of disulfide and sextuple hydrogen bonds within the copolymer network, as well as the interfacial interactions between GO\/ZIF\u20108@CCM nanosheets and the resin matrix, multi\u2010mechanism synergistic toughening is realized. The resulting composite exhibits a high tensile strength of 23.29\u00a0MPa, exceptional stretchability of 542.97%, and outstanding self\u2010healing performance (76.48% at 25\u00b0C for 4\u00a0h). Notably, pH\u2010responsive nanosheets mediate the rapid release of curcumin for extrinsic repair, while the reconstruction of multiple dynamic bonds in the covalent network enables intrinsic self\u2010healing, operating in a time\u2010sequenced synergistic manner to achieve rapid and durable self\u2010healing. Even post\u2010damage and 20 days of immersion, the coating maintains an impedance modulus of 1.09 \u00d7 10\n                    <jats:sup>7<\/jats:sup>\n                    \u03a9\u00b7cm\n                    <jats:sup>2<\/jats:sup>\n                    . This work offers an innovative paradigm for designing smart anticorrosion materials with integrated multifunctional protective capabilities.\n                  <\/jats:p>","DOI":"10.1002\/smll.74179","type":"journal-article","created":{"date-parts":[[2026,6,18]],"date-time":"2026-06-18T10:29:07Z","timestamp":1781778547000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Bioinspired Time\u2010Gradient Self\u2010Healing Polyurethane\/Epoxy Covalent Dynamic Networks Enhanced by GO\/ZIF\u20108@Curcumin for Marine Protection"],"prefix":"10.1002","volume":"22","author":[{"given":"Zhongkai","family":"Zhao","sequence":"first","affiliation":[{"name":"State Key Laboratory of Advanced Marine Materials Zhejiang Key Laboratory of Extreme\u2010environmental Material Surfaces and Interfaces Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences  Ningbo China"},{"name":"School of Materials Science and 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