Corrosion protection of aluminium alloy by cerium conversion and conducting polymer duplex coatings
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
23/09/2013
23/09/2013
2012
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| Resumo |
The corrosion protection of AA6063 aluminium alloy by cerium conversion, polyaniline conducting polymer and by duplex coatings has been investigated. The electrochemical behaviour was evaluated in aerated 3.5 wt.% NaCl. All coatings tested shifted the corrosion and pitting potentials to more positive values, indicating protection against corrosion. The duplex coatings are significantly more effective than each coating alone: corrosion and pitting potentials were shifted by +183 and +417 mV(SCE), respectively, by duplex coatings in relation to the untreated aluminium alloy. Optical microscopy and scanning electron microscopy are in agreement with the electrochemical results, reinforcing the superior performance of duplex coatings. (C) 2012 Elsevier Ltd. All rights reserved. Brazilian funding agency CNPq [140402/2009-8, 160466/2011-3] Brazilian funding agency CNPq Brazilian funding agency CAPES Brazilian funding agency CAPES [BEX 4935/10-1] Portuguese funding agency FCT Portuguese funding agency FCT [CEMUC(R) (Research Unit 285)] |
| Identificador |
CORROSION SCIENCE, OXFORD, v. 63, n. 2, pp. 342-350, OCT, 2012 0010-938X http://www.producao.usp.br/handle/BDPI/33613 10.1016/j.corsci.2012.06.020 |
| Idioma(s) |
eng |
| Publicador |
PERGAMON-ELSEVIER SCIENCE LTD OXFORD |
| Relação |
CORROSION SCIENCE |
| Direitos |
closedAccess Copyright PERGAMON-ELSEVIER SCIENCE LTD |
| Palavras-Chave | #ALLOY #ALUMINIUM #POLARIZATION #PAINT COATINGS #PITTING CORROSION #POLYMER COATINGS #STAINLESS-STEELS #POLYANILINE #INHIBITION #LAYERS #BEHAVIOR #DEPOSITION #MECHANISM #CHLORIDE #2024-T3 #AA2024 #MATERIALS SCIENCE, MULTIDISCIPLINARY #METALLURGY & METALLURGICAL ENGINEERING |
| Tipo |
article original article publishedVersion |
