摘要
研究了添加不同颜基比(P／B)znO的聚氨酯涂料在3．5％氯化钠溶液中的电化学阻抗谱特征,提出了涂层电极在浸泡阶段对应的不同阻抗模型．结果表明,添加量为P／B=0．3的纳米复合涂层,颜料分布均匀适中,具有最佳电化学及耐盐雾性能．纳米复合涂层的抗介质渗透能力明显优于普通涂层,其原因是纳米材料独特的表面效应使其致密性有所提高．
Electrochemical impedance spectrum of the polyurethane coatings pigmented with nanoZnO at different P/B （the ratio of pigment and base） immersed in 3.5% NaCI was investigated and the impedance models related to different immersion stages were also proposed. The coating with P/B=0.3 has the best anti-corrosion and salt spray performance. The corrosion performance of normal coating was also measured for comparison. The nano-composite coating shows better corrosion resistance than the normal coating because of the increase of the coatings＇ denseness by adding nano-ZnO to the coatings.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2006年第4期354-360,共7页
Chinese Journal of Materials Research
基金
国家自然科学基金重大项目50499334
国家重点基础研究发展计划G19990650资助项目.~~
关键词
材料失效与保护
电化学阻抗谱
纳米复合涂料
防腐蚀性能
materials failure and protection, electrochemical impedance spectrum （EIS）, nanocomposite coatings, anti-corrosion performance
