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SUPER-HYDROPHOBIC SURFACES IMPROVING CORROSION RESISTANCE OF Fe3Al-TYPE\par INTERMETALLIC IN SEAWATER |
WANG Shuaibo; YIN Yansheng; LIU Tao; TENG Shaolei |
Institute of Materials Science and Engineering; Ocean University of China;Qingdao 266100 |
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Abstract Monolayer of n-tetradecanoic acid (CH3(CH2)12COOH) salt is self-assembled on the native oxide surfaces of Fe3Al, and characterized by contact angle measurement and scanning electron microscope (SEM). The structure of the adsorbed film is similar to that of the lotus leaf, and the contact angle is larger than 150° for seawater. The corrosion behavior of Fe3Al with and without super-hydrophobic film, in seawater (pH 8.02), has been investigated by electrochemical impedance spectroscopy (EIS) and mass loss measurements. Both results reveal that corrosion rate of modified Fe3Al decreases dramatically. It is believed that the super-hydrophobic film can inhibit the corrosion process of Fe3Al in the seawater in a certain degree.
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Received: 28 May 2007
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Corresponding Authors:
YIN Yansheng
E-mail: yys2003@ouc.edu.cn
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