Hydrogels are formed through the cross-linking of hydrophilic polymer chains within an aqueous microenvironment. A novel synthesis strategy, UV-initiated frontal polymerization to quickly synthesize bubble-free, self-propagating hydrogel anticorrosive coatings in aqueous conditions, was presented, in which the self-propagating polymerization rate reached 16.7 mm min^–1. SEM, AFM, FTIR, EIS, IC, XPS, and ultra-depth-of-field microscopy were used to characterize the surface morphology and anti-corrosion properties of the hydrogel coating. The addition of nano-SiO₂ formed dense hydrogen bonds, and the stability of the three-dimensional network was enhanced. Underwater, the hydrogel coating could physically block corrosive media from reaching steel surfaces, and it was 75% effective at blocking chloride ions after 7 days under osmotic pressure. In addition, 1,2,4-triazole accumulated on the steel surface, and then the active anti-corrosion function took effect. This paper provides the basis for the in situ synthesis of hydrogel anticorrosive coatings on the surface of mild steel in a wet or underwater state.

中文翻译：

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用于快速合成无气泡、自蔓延水凝胶防腐涂层的紫外引发前沿聚合

水凝胶是通过亲水性聚合物链在水性微环境中的交联形成的。提出了一种新的合成策略，即紫外线引发的前沿聚合，可在水性条件下快速合成无气泡、自蔓延的水凝胶防腐涂层，其中自蔓延聚合速率达到 16.7 mm min ^–1。SEM、AFM、FTIR、EIS、IC、XPS 和超景深显微镜用于表征水凝胶涂层的表面形貌和防腐性能。添加纳米SiO ₂形成致密的氢键，增强了三维网络的稳定性。在水下，水凝胶涂层可以物理阻挡腐蚀性介质到达钢表面，在渗透压下 7 天后，它可以有效阻挡 75% 的氯离子。此外，1,2,4-三唑在钢材表面积累，起到了积极的防腐作用。该论文为在潮湿或水下状态下在低碳钢表面原位合成水凝胶防腐涂层提供了依据。