新型临时保护涂料的制备及在核电设施中应用的可行性研究

Preparation of Novel Temporary Protective Coating and Feasibility Study on Its Application in Nuclear Power Facilities

针对核电设施在建设过程中易发生设备安装碰撞损坏、长期放置发生腐蚀等问题,设计并制备了一种新型水性可剥离临时保护涂料,通过盐雾试验、人工老化试验、湿热试验、柔韧性测试等研究了可剥离临时保护涂料在核电设施内临时保护方面应用的可行性。结果表明,自制的可剥离临时保护涂料具有良好的耐盐雾性能和耐侯性能,盐雾试验500 h后、人工老化600 h后涂料的机械性能均未发生明显变化;有毒有害元素均在限值以下,不会诱发被保护设备的应力腐蚀;具有良好的柔韧性、伸长率、拉伸强度、抗冲击性能及剥离强度,可对设备表面形成较好的保护效果且易于剥离,在核电设施建设过程中应用在设备临时保护方面是可行的。

A novel waterborne strippable temporary protective coating has been prepared to address the problems of equipment installation collision damage and corrosion during the construction process of nuclear power facilities.The application feasibility of the strippable temporary protective coating in the temporary protection of nuclear power facilities has been studied via salt spray tests,artificial aging tests,damp heat tests and flexibility tests.The results show that the self-prepared strippable temporary protective coating has good salt spray resistance and weather resistance.After 500 hours of salt spray test and 600 hours of artificial aging test,the mechanical properties of the coating have not changed significantly.The toxic and harmful elements are below the limit,which will not induce stress corrosion of the protected equipment.It has good flexibility,elongation,tensile strength,impact resistance and peel strength,which can form a good protective effect on the surface of equipment and is easy to peel off. It is feasible to apply it in the temporary protection ofequipment during the construction process of nuclear power facilities.