摘要
以镀锌钢为基体,在表面制备添加不同比例磺基水杨酸的环氧清漆试样。利用附着力测试仪,测试了涂层试样的附着力,通过电化学阻抗谱研究了环氧清漆试样在3.5%NaCl溶液中的防腐蚀性能,并探讨了磺基水杨酸对涂层试样防腐蚀性能的影响机理。结果表明:随着磺基水杨酸含量的增加,涂层附着力、涂层防腐蚀性能均先增大后减小;添加3%(质量分数)磺基水杨酸的涂层附着力最大;除浸泡初期外,磺基水杨酸含量为3%时涂层的低频阻抗模值和涂层孔隙电阻Rc最高,电荷转移电阻Rt出现得最晚,其数值也最大,即添加3%的磺基水杨酸环氧涂层在镀锌钢表面具有最佳附着力和防腐蚀性能。
Epoxy varnish coatings with different amount of sulfosalicylic acid were prepared on galvanized steel. The adhesion and corrosion performance of the coatings were characterized by means of pull- off adhesion tester and electrochemical impedance spectroscopy（EIS） respectively.While the effect of sulfosalicylic acid on the corrosion resistance of the coatings was also studied in 3.5%NaCl solution. The results show that with the increasing amount of sulfosalicylic acid, the adhesive strength of the coatings increases firstly, and then decreases. Among others, the coating with 3%（mass fraction） sulfosalicylic acid exhibits the highest adhesive strength, modules at low frequency and pore resistance during the immersion process only except for the initial stage; as well as the highest charge transfer resistance. These results show that the epoxy varnish coatings containing 3% sulfosalicylic acid has the best adhesion and corrosion resistance.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2015年第5期455-460,共6页
Journal of Chinese Society For Corrosion and Protection
基金
国家国际科技合作专项项目(2014DFR50560)
输变电设备防腐材料开发机应用关键技术研究项目(521820130014)
中央高校基本科研业务费专项资金项目(HEUCF20151011)资助
关键词
镀锌钢
磺基水杨酸
环氧涂层
附着力
防腐蚀性能
galvanized steel
sulfosalicylic acid
epoxy coating
adhesion
corrosion resistance
