自抛光防污涂层的水渗透特性及其对抛光速率的影响研究OACSTPCD

Antifouling coatings applied to the surface of marine facilities can significantly cut down on the economic losses caused by biofouling.Among them,self-polishing antifouling coatings have become the leading products in the antifouling coatings market for their good polishing performance and excel-lent antifouling effect.The permeation behavior of water in two acrylic silicone self-polishing antifouling coatings A1 and A2 was analyzed and compared by electrochemical impedance spectroscopy(EIS),and the polishing rates of the two coatings in 3.5%artificial seawater were measured by dynamic simulation tests.The EIS results demonstrated that the water penetration in both acrylic silicone self-polishing an-tifouling coatings followed the Fick diffusion pattern,which were then fitted to give a saturated volume percentage of water absorption approximately 11.5%for coating A1 and 20%for coating A2.According to dynamic simulations,the polishing rates in 3.5%artificial seawater was 0.15 μm/d for antifouling coat-ing A1 and 0.26 μm/d for coating A2.The higher saturated volume percentage of water absorption has a more favorable effect on the ability to hydrolyze of the silicone acrylate resin,which speeds up polishing.