Electrodeposition of polypyrrole–titanate nanotube composites coatings and their corrosion resistance
Electrodeposition of polypyrrole–titanate nanotube composites coatings and their corrosion resistance
Polypyrrole (PPy) films (2 micro-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 904L 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
adsorption, composites, corrosion, electrodeposition, polypyrrole, titanate nanotubes
1323-1328
Herrasti, P
98101327-661e-4986-8ab2-b808d604d76e
Kulak, A.N.
e09573a7-40c5-45dc-a65d-2ffad6244fa7
Bavykin, D.V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Zekonyte, J.
4a1b52a8-fa37-45d8-88d8-593df2efe662
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
1 January 2011
Herrasti, P
98101327-661e-4986-8ab2-b808d604d76e
Kulak, A.N.
e09573a7-40c5-45dc-a65d-2ffad6244fa7
Bavykin, D.V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Zekonyte, J.
4a1b52a8-fa37-45d8-88d8-593df2efe662
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Herrasti, P, Kulak, A.N., Bavykin, D.V., Ponce de Leon, Carlos, Zekonyte, J. and Walsh, F.C.
(2011)
Electrodeposition of polypyrrole–titanate nanotube composites coatings and their corrosion resistance.
Electrochimica Acta, 56 (3), .
(doi:10.1016/j.electacta.2010.09.094).
Abstract
Polypyrrole (PPy) films (2 micro-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 904L 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
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Published date: 1 January 2011
Keywords:
adsorption, composites, corrosion, electrodeposition, polypyrrole, titanate nanotubes
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 169253
URI: http://eprints.soton.ac.uk/id/eprint/169253
ISSN: 0013-4686
PURE UUID: 90cab0b9-d6aa-4fe7-b7d7-2e31b96504ef
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Date deposited: 14 Dec 2010 08:14
Last modified: 14 Mar 2024 02:50
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Author:
P Herrasti
Author:
A.N. Kulak
Author:
J. Zekonyte
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