纳米银对环氧涂层在烟气脱硫系统中腐蚀行为的影响  

Effect of Ag Nanoparticles on the Corrosion Behavior of Epoxy Coatings in Flue Gas Desulfurization System

作　　者：陈浩[1] 万强 蔡耀[1] 刘琰[1] 吴忠烨 陈燕鸣[1] 杨兵[1] CHEN Hao1 , WAN Qiang2, CAI Yao1 , LIU Yan1 , WU Zhong-ye1, CHEN Yan-ming1 , YANG Bing1(1. School of Power ＆ Mechanical Engineering, Wuhan University, Wuhan 430072, China; 2. College of Engineering, Huazhong Agricultural University, Wuhan 430070, China)

机构地区：[1]武汉大学动力与机械学院,湖北武汉430072 [2]华中农业大学工学院,湖北武汉430070

出　　处：《材料保护》2018年第9期24-29,共6页Materials Protection

基　　金：国家自然科学基金(11275141);国家自然科学基金(51401148)资助

摘　　要：为研究不同纳米银含量对环氧涂层结构与在60℃烟气脱硫模拟液中腐蚀行为的影响,将纳米银颗粒分散液加入到环氧防腐蚀涂料中制备纳米银环氧涂层,利用极化曲线、电化学阻抗谱(EIS)、扫描电子显微镜(SEM)与红外光谱(FT-IR)表征了涂层的结构与电化学性能。结果表明:纳米银与环氧涂层的酯基存在一定的相互作用,随着纳米银含量的增加,涂层中羰基伸缩振动吸收峰与酯的C-O-C不对称伸缩振动吸收峰逐渐蓝移。涂层在烟气脱硫模拟液中的耐蚀性先随着纳米银含量的增加而增大,纳米银含量为2%(质量分数)时,涂层耐蚀性能最佳,此后随着纳米银含量的继续增加而逐渐下降。In order to explore the effects of Ag nanoparticles on the microstructures and the corrosion behaviors of the epoxy coatings in flue gas desulfurization simulating solution at 60 ℃, the dispersion solution with Ag nanoparticles was added into epoxy corrosion resistance coating, and the structure and electrochemical properties of the epoxy coatings were investigated by potentiodynamic polarization curves, electrochemical impedance spectroscopy （EIS）, scanning electron microscope （SEM） and infrared spectrum（FT-IR）. Results showed that Ag nanoparticles affected with the ester of epoxy coatings. With the increase of Ag nanoparticles, the peak blue shift of carbonyl stretching vibration absorption and C-O-C asymmetric stretching vibration absorption was found. When the content of the Ag nanoparticles increased from 0 to 2%（ mass fraction）, the corrosion resistance of the coatings increased. The epoxy coating with 2 % Al nanoparticles had the optimal corrosion resistance, but the corrosion resistance decreased with further increase of the content of the Ag nanoparticles.

关 键 词：纳米银颗粒 环氧涂层 腐蚀行为 烟气脱硫 

分 类 号：TG174.4[金属学及工艺—金属表面处理]