Electrodeposition of polypyrrole-titanate nanotube composites coatings and their corrosion resistance
Electrodeposition of polypyrrole-titanate nanotube composites coatings and their corrosion resistance
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DOI：
10.1016/j.electacta.2010.09.094
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发表时间：
2011-01-01
影响因子：
6.6
通讯作者：
Walsh, F. C.
中科院分区：
文献类型：
--
作者：
Herrasti, P.;Kulak, A. N.;Walsh, F. C.
在298 K下，由0.5 mol dm（-3）吡咯（Py）和1 g dm（-3）TiNT在0.1 mol dm（-3）草酸水溶液中在0.1 mm厚的904 L不锈钢（SS）上沉积了含有TiNT的聚吡咯（PPy）膜（2 μ m）。电子显微镜显示纳米管吸附在聚吡咯表面并均匀分散在聚合物基体中。PPy/TiNT复合材料包含< 10重量%的钛酸盐，与单独的聚吡咯相比，硬度增加了53%。TINT提供成核中心以催化吡咯的聚合，并且可以吸附高达240 mg g（-1）的单体。SS. SS/PPy和SS/PPy/TiTN复合材料在3%w/v NaCl溶液中的线性扫描伏安法和开路电位分别为1.61、0.008和0.004 mg dm（-2）d（-1），表明在复合膜存在下，不锈钢的腐蚀速率降低了三个数量级。(C)2010爱思唯尔有限公司版权所有。
Polypyrrole (PPy) films (2 mu m) containing titanate nanotubes (TiNT) were deposited from 0.5 mol dm(-3) pyrrole (Py) and 1 g dm(-3) of TiNT in 0.1 mol dm(-3) aqueous oxalic acid on 904 L stainless steel (SS) 0.1 mm thickness at 298 K. Electron microscopy showed that the nanotubes were adsorbed on the PPy surface and uniformly dispersed in the polymer matrix. The PPy/TiNT composite contained < 10 wt.% titanates which showed an increase of 53% hardness compared with polypyrrole alone. The TINT provide nucleation centres to catalyze the polymerization of pyrrole and can adsorb up to 240 mg g(-1) of the monomer. The corrosion rates for SS. SS/PPy and SS/PPy/TiTN composites, evaluated by linear sweep voltammetry and open-circuit potential measurements in 3% w/v NaCl, were 1.61, 0.008 and 0.004 mg dm(-2) day(-1), respectively, indicating that corrosion rates of stainless steel decreased by up to three orders of magnitude in the presence of the composite films. (C) 2010 Elsevier Ltd. All rights reserved.