Abstract: ［Objective］ To address the operational challenges faced by PMMA cover plates in polar marine environments，including low-temperature intrusion and floating ice collision in polar marine environment.［Methods］A dual-layer composite coating system was developed，consisting ofan epoxy-based thermal insulation primer with low thermal conductivity and high adhesion，and a polysiloxane-based topcoat with high wear resistance and impact protection.［Results］The topcoat exhibited a wear value of 64. 5 mg at -35 ℃ under 500 g/1 000 r. Meanwhile，the coating system maintained surface integrity after undergoing -30 ℃ ice impact testing while demonstrating excellentsalt spray resistance and weather resistance. Additionally，this system reduced the thermal conductivity of PMMA covers from 0. 141 W/（m·K） to 0.108W/（m·K）， while the thermal conductivity of the primer was as low as 0. 049 W/（m·K）. In a -55 ℃ low-temperature environment，coated and uncoated PMMA samples were used as insulation box covers. After sealing at room temperature and resting for60 minutes，the internal temperature difference between them reached 10. 61 ℃，meeting equipment service requirements.［Conclusion］ This coating system simultaneously achieves effective thermal insulation，low-temperature wear resistance，resistance to floating ice impact，and excellent weather resistance in an energy-neutral manner. It provides a viable solution for high-reliability protection ofpolar equipment in environments characterized by the coupled effects of low temperatures，high salinity， and floating ice.

Key words: polymethyl methacrylate, arctic low temperatures, thermal insulating primer, wear resistant coating, resistance to floating ice impact

摘要： 【目的】解决极地海洋环境下聚甲基丙烯酸甲酯（ PMMA）盖板面临的低温侵袭与浮冰碰擦对某装备运行造成的障碍。【方法】开发了环氧 -低导热 -高附着的隔热底漆和聚硅氧烷 -高耐磨 -防碰擦面漆所构成的双层复合涂层体系。【结果】面漆在 .35 ℃，500 g/（1 000 r）下磨损质量为 64. 5 mg，同时配套涂层体系在经受 .30 ℃浮冰冲击试验后保持表面完整，并具备优异的耐盐雾性与耐老化性。此外，本体系使 PMMA盖板导热系数从 0. 141 W/（m·K）降至 0. 108 W/（m·K），底漆导热系数低至 0. 049 W/（m·K）。 -55 ℃低温环境下，将单面涂覆复合涂层和空白的 PMMA样板分别作为绝热箱盖板，常温下贴敷密封后静置 60 min，二者内部温差达 10. 61 ℃，满足装备服役需求。【结论】该涂层体系以零能耗方式同步实现了有效隔热、低温耐磨、耐浮冰碰擦与良好的耐候性，为极地装备在低温、高盐、浮冰等多因素耦合环境下的高可靠防护提供了可行的解决方案。

关键词: 聚甲基丙烯酸甲酯, 极地低温, 隔热底漆, 耐磨涂层, 耐浮冰碰擦性

CLC Number: 

• TQ637