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Design of smart protective coatings with autonomous self-healing and early corrosion reporting properties

2021; Elsevier BV; Volume: 184; Linguagem: Inglês

10.1016/j.corsci.2021.109355

1879-0496

Chengbao Liu, Hao Wu, Yujie Qiang, Haichao Zhao, Liping Wang,

Concrete Corrosion and Durability

This work reports the design of supramolecular polyurethane coating capable of early corrosion reporting and efficient self-healing for steel protection. Immersion experiment indicates that the occurrence of early corrosion can be rapidly reported and highlighted by the formation of Phen-Fe complex with conspicuous red color. Electrochemical and mechanical tests illustrate that the prepared coating possessed autonomous self-healing under room temperature, saltwater and hypothermia conditions, which are attributed to the dynamic interactions of hydrogen bonds. Taking advantage of the merits of as-prepared coating, the metallic materials corrosion can be nondestructive detected and the damage can be autonomously repaired.