双组分改性聚氨酯水工防腐涂层性能研究

Properties of Two-Component Modified Polyurethane Hydraulic Anticorrosive Coatings

采用柔性材料防护水利过流部件解决其运行过程中气蚀、磨蚀及其联合作用导致的破坏问题。以化学改性的方式在聚氨酯侧链上引入氟碳链及疏水性基团,合成兼具聚氨酯弹性体、氟碳化合物双组分性能的涂层材料。通过对涂层制备过程中喷涂压力、温度等喷涂工艺参数优化制备性能最佳涂层。对材料进行疏水性、冲蚀磨损、人工老化等测试,采用扫描电镜对涂层微观形貌进行观察,分析磨蚀机理对涂层性能及防护效果影响。结果表明:所制备涂层可有效提升过流部件的防腐耐磨性能。

Flexible materials was used to protect hydraulic over-current components to solve the damage caused by cavitation and abrasion during operation and their combined action.The fluorocarbon chain and hydrophobic groups was introduced into the polyurethane side chain chemically to prepare the binders for 2K coatings that provide the advantages from both PU elastomer and fluorocarbon compound.The optimum coatings performance was achieved by optimizing the spraying process parameters,such as spraying pressure and temperature.The coatings was tested in terms of water resistance,erosion wear and accelerated weathering.The microscopic morphology of the coatings film was observed by SEM to understand the influence of abrasion mechanism on the coatings performance and protective effects.The results showed that the coatings can effectively improve the anti-corrosion and wear resistance of the over-current components.