环氧树脂和聚硅氧烷复合涂层在重工业污染区气候下的腐蚀行为  

Corrosion Behavior of Epoxy and Polysiloxane Composite Coating in the Climate of Heavy Industrial Pollution Area

作　　者：王雄英[1] 杨文静[1] 黎学明[1] 刘丽丹 曹渊[1] 李安琪 Wang Xiongying;Yang Wenjing;Li Xueming;Liu Lidan;Cao Yuan;Li Anqi(College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China;Chongqing Food and Drug Inspection Institute,Chongqing 401121,China)

机构地区：[1]重庆大学化学化工学院,重庆401331 [2]重庆市食品药品检验检测研究院,重庆401121

出　　处：《山东化工》2019年第9期55-59,共5页Shandong Chemical Industry

摘　　要：Q235钢基材表面分别喷涂环氧树脂和聚硅氧烷体系涂层于重庆市"重工业污染区"110kV变电站大气环境中自然曝晒0～450 d。通过电化学测试,研究两种体系浸在5%NaCl介质中的耐候性与耐盐蚀性、腐蚀类型、腐蚀规律。结果表明:环氧树脂涂层体系平均腐蚀电流密度为1.118 0×10^(-10)μA/cm^2,平均极化阻抗为1.313 1×10~7·cm^2;聚硅氧烷涂层体系平均腐蚀电流密度为8.602 0×10^(-9)μA/cm^2,平均极化阻抗为2.470 8×10~6·cm^2;结合腐蚀形貌分析,环氧涂层比聚硅氧烷有较好的耐候性,具有良好的防腐性能。Epoxy and polysiloxane coating were sprayed on the surface of Q235 steel substrate and the two systems were naturally exposed to the sun for 0~450 d in the atmospheric environment of 110 kV substation of Chongqing heavy industrial pollution area. The weathering resistance,salt corrosion resistance,corrosion type and corrosion law of the two systems immersed in 5% NaCl medium were studied by electrochemical method. The results showed that the average corrosion current density of epoxy coating system was 1.118 0×10^-10 μA/cm^2 and the average polarization impedance was 1.313 1×10^7 ·cm^2. The average corrosion current density of the polysiloxane coating system was 8.6020×10^-9 μA/cm^2 and the average polarization impedance was 2.470 8×10^6 ·cm^2. Compared with polysiloxane,epoxy coating has better weather resistance and corrosion morphology. Epoxy coating has good corrosion resistance in heavy industrial pollution area.

关 键 词：Q235钢 环氧树脂 聚硅氧烷 电化学技术 大气腐蚀 

分 类 号：O646.6[理学—物理化学]