纳米碳酸钙浓缩浆对环氧涂层耐蚀性的影响  

Influence of Nano-CaCO_3 Concentrates on Corrosion Resistance of the Epoxy Coatings

作　　者：刘明明[1] 刘福春[1] 韩恩厚[1] 唐囡[2] 万军彪[2] 邓静伟[2] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016 [2]江西省电力科学研究院,南昌330096

出　　处：《材料研究学报》2013年第4期425-431,共7页Chinese Journal of Materials Research

基　　金：国家科技支撑计划2012BAB15B00;国家电网公司科技521820130014资助项目~~

摘　　要：在分散稳定的纳米碳酸钙浓缩浆中,Sa10超分散剂牢固吸附在纳米碳酸钙表面并形成吸附层。纳米碳酸钙浓缩浆提高了环氧涂层的附着力和耐腐蚀性。吸附层的空间位阻效应阻碍纳米碳酸钙粒子间的聚集,且溶剂化层使纳米碳酸钙从极性向非极性转变,提高其与环氧树脂的相容性,保障其在环氧涂料中均匀性和稳定分散。因此,纳米碳酸钙浓缩浆增强了涂层的物理屏蔽作用,使涂层的耐蚀性提高。In highly-dispersed and stable nano-CaCO3 concentrates, the Sal0 hyperdispersant firm ly adsorbed on the surface of CaCO3 nanoparticles and a adsorptive layer formed. Nano-CaCO3 concen trates improved the epoxy coating adhesion and the corrosion resistance. A adsorptive layer produced stedc effect and hindered the nano-CaCO3 particles to aggregate, while the solvatable layer transfered nano-CaCO3 particles from the polarity shift to nonpolarity, increasing their compatibility with the epoxy resin, which ensured their uniformity and stable dispersion in the epoxy coatings. Thereby nano-CaCO3 concentrates enhanced the physical shielding of the coatings, and improved the corrosion resistance.

关 键 词：材料失效与保护 纳米粒子 表面改性 超分散剂 输变电设备 防腐蚀材料 

分 类 号：TB304[一般工业技术—材料科学与工程]