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http://dx.doi.org/10.3740/MRSK.2006.16.6.386

Characterization of Electro-Polymerized Polyaniline Film on the Cold Rolled Sheet in the Oxalic acid and Sodium Molybdate Electrolyte  

Lim, Ki-Young (LS Cable)
Yoon, Jeong-Mo (Department of Metallurgical Engineering, Chonbuk National University)
Ki, Joon-Seo (Department of Metallurgical Engineering, Chonbuk National University)
Jang, Yong-Seok (Department of Metallurgical Engineering, Chonbuk National University)
Publication Information
Korean Journal of Materials Research / v.16, no.6, 2006 , pp. 386-393 More about this Journal
Abstract
Increasing environmental concerns require to solve the problem produced due to the use of heavy metals in coating formulations. Therefore, it is necessary to develop new coating strategy employing inherently conducting polymers such as polyaniline. Polyaniline is a conductive polymer that is synthesized by oxidation polymerization, and the electrochemical and chemical polymerization are possible for the oxidation of aniline. Electrochemical oxidation polymerization produces a fine surface and although voltage control is more convenient, it require electrolytic cells, and elaborate thin film can be acquired with the polymerization. Polyaniline films were electro-polymerized on cold rolled sheets using the galvanostat mode in the oxalic acidaniline-sodium molybdate electrolyte. The structure and properties of polyaniline film were studied using Potentiostat/Galvanostat 263A, FE-SEM,, AFM, SST, Colorimetry. A high corrosion resistance of polyaniline film was observed with an increase of corrosion potential by $500{\sim}600$ mV for the substrate covered with polyaniline.
Keywords
polyaniline film; corrosion resistance; conducting polymer; electrochemical polymerization;
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