Abstract: The preparation of high-adhesion photocurable metal anticorrosive coatingspresented a significant challenge. This study explored the use of upconversion particle-assisted near-infrared photopolymerization（NIR）to develop coatings with superior adhesionand corrosion resistance. The curing conditions of the NIR system，the curing behavior of the coatings，and the adhesion and corrosion resistance of coatings formulated with multifunctionalreactive diluents were investigated. The results indicated that the polymerization rate wasfastest and the double bond conversion was highest when the concentrations of photoinitiatorand upconversion particles（UCPs）were 2% and 4% respectively，and the NIR power densitywas 30 W/cm². Compared to UV curing systems，the NIR curing system achieved a doublebond conversion rate of 90% at both the top and bottom of the coating. Additionally，it increased the double bond conversion at the gel point，which could reduce curing shrinkage stress，thereby improving the adhesion and corrosion resistance of the coating. The coating withmonofunctional reactive diluent exhibited the highest adhesion，demonstrating excellent corrosion resistance. NIR curing provided a new strategy for the preparation of environmentallyfriendly，high-performance anticorrosive coatings，with promising potential for broader applications in the field of metal corrosion protection.

Key words: near-infrared（NIR）photopolymerization, reactive diluents, metal anticorrosion, anticorrosive coatings

摘要： 为制备具有优异附着力和防腐性能的光固化金属防腐涂层，采用近红外光（NIR）诱导上转换粒子辅助光聚合制备了光固化防腐涂层。探究了 NIR固化体系的固化条件、涂层固化行为以及不同官能度活性稀释剂所得涂层的附着力和防腐性能。结果表明：当光引发剂添加量为 2%、上转换纳米粒子（UCPs）添加量为 4%、NIR功率密度为 30 W/cm²时，聚合速率最快且双键转化率最高。相比于 UV固化体系，NIR固化体系的表面/底面双键转化率均可达到 90%，还能够提高凝胶点双键转化率，有利于降低固化收缩应力，从而提升涂层的附着力及耐腐蚀性。使用单官活性稀释剂的涂层表现出最高的附着力，具有良好的防腐性能。NIR固化为制备绿色环保高性能防腐涂层提供了一种新策略，有望在金属防腐涂层领域取得更广泛的应用。

关键词: 近红外光固化, 活性稀释剂, 金属防腐, 防腐涂料

CLC Number: 

• TQ637. 83