储油罐用慢干型高性能防腐蚀聚脲涂料的制备及性能研究  

Preparation and properties of slow-curing high-performance anticorrosive polyurea paint for oil storage tanks

作　　者：周志勇 曾艺星 杨金鑫 陈中华[2,3] ZHOU Zhiyong;ZENG Yixing;YANG Jinxin;CHEN Zhonghua(Sinopec Maoming Petrochemical Company,Maoming 525000,China;South China University of Technology,Guangzhou 510640,China;Guangdong Daer Novel Materials Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]中国石化集团茂名石油化工有限公司,广东茂名525000 [2]华南理工大学,广东广州510640 [3]广东达尔新型材料有限公司,广东广州510663

出　　处：《电镀与涂饰》2025年第4期121-126,共6页Electroplating & Finishing

基　　金：官能化离子聚合物涂层设计、制备及其耐α射线辐射损伤机制研究(22278386)。

摘　　要：[目的]储油罐目前常用的防腐涂层体系以水性环氧涂料为底漆,喷涂聚脲涂料为面漆,然而传统喷涂聚脲涂料严重依赖于施工设备,急需研发一款可采用常规喷涂设备施工的聚脲涂料。[方法]以聚天门冬氨酸酯树脂、防锈颜料、云母粉和助剂为A组分,由异佛尔酮二异氰酸(IPDI)和聚醚胺合成的预聚体为B组分,制备了一款慢干型高性能防腐蚀聚脲涂料。通过探究预聚体的树脂种类、合成温度、异氰酸酯含量及树脂配比,确定了最佳的涂料配方。[结果]该配方的活化期长达30 min。制备的聚脲涂层耐盐雾和5%的硫酸、氢氧化钠、盐水的时间均超过4400 h,且在3.5%NaCl溶液中浸泡69 d后的电化学低频阻抗模值仍达到109Ω·cm^(2)量级。[结论]这款涂料不仅可采用常规的喷涂方式施工,并且具有优异的防腐蚀性能,在储油罐防腐蚀涂层领域具有较大的应用潜力。[Objective]The commonly used anticorrosive coating system for oil storage tanks currently employs waterbased epoxy paint as the primer and sprayable polyurea paint as the topcoat.However,traditional polyurea paints heavily rely on specialized application equipment,necessitating the development of a polyurea paint that can be applied using conventional spraying equipment.[Method]A slow-curing high-performance anticorrosive polyurea paint was developed,with Component A comprising polyaspartic ester resin,anti-rust pigment,mica powder,and additives,and Component B comprising a prepolymer synthesized from isophorone diisocyanate(IPDI)and polyetheramine.The effects of the type of resin,temperature,isocyanate content,and mass ratio of resins for synthesis of the prepolymer were studied to determine the optimal paint formulation.[Result]The optimized paint exhibited an extended pot life of up to 30 minutes.The resulting polyurea coating showed excellent resistance to neutral salt spray and immersion in 5%sulfuric acid,sodium hydroxide,and saltwater,with exposure time exceeding 4400 hours.After 69 days of immersion in a 3.5%NaCl solution,the electrochemical low-frequency impedance magnitude of the polyurea coating specimen remained at a level of 109Ω·cm^(2).[Conclusion]This paint not only can be applied using conventional spraying methods,but also exhibits outstanding anticorrosion performance,making it highly promising for application in anticorrosive coating systems for oil storage tanks.

关 键 词：聚脲涂料 慢干 储油罐 防腐蚀 

分 类 号：TG174.461[金属学及工艺—金属表面处理] TQ633[金属学及工艺—金属学]