Stable biomimetic film on Fe_3Al surface for corrosion resistance in seawater  

作　　者：CHEN ShouGang, LIU Tao & YIN YanSheng Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China 

出　　处：《Science China(Technological Sciences)》2008年第7期975-978,共4页中国科学（技术科学英文版）

基　　金：the Excellent Mid-youthful Scientist Encouraging Foundation of Shandong Province (Grant No. 2006BS04021);the National Natural Science Foundation of China (Grant Nos. 50672090 and 50702053)

摘　　要：Stable superhydrophobic n-tetradecanoic acid (CH3(CH2)14COOH) film was pre- pared by means of sol-gel and self-assembly techniques, with a very high seawater contact angle (158°) and a small sliding angle (<5°). There are many microconvexi-ties with binary structure uniformly distributed on the surface atop the film with an average diameter of about 80 nm by observation of scanning electron microscope (SEM), and the film surface structure is similar to that of lotus surface. The corrosion resistance behavior of intermetallic Fe3Al with the biomimetic superhydrophobic film surface is improved obviously when compared with pure Fe3Al sample by measurement of electrochemical impedance spectroscopy (EIS).Stable superhydrophobic n-tetradecanoic acid (CH3(CH2)14COOH) film was pre- pared by means of sol-gel and self-assembly techniques, with a very high seawater contact angle (158°) and a small sliding angle (<5°). There are many microconvexi-ties with binary structure uniformly distributed on the surface atop the film with an average diameter of about 80 nm by observation of scanning electron microscope (SEM), and the film surface structure is similar to that of lotus surface. The corrosion resistance behavior of intermetallic Fe3Al with the biomimetic superhydrophobic film surface is improved obviously when compared with pure Fe3Al sample by measurement of electrochemical impedance spectroscopy (EIS).

关 键 词：corrosion THIN films coatings FE3AL NANOCRYSTALLINE materials 

分 类 号：TG174.4[金属学及工艺—金属表面处理]