Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys

Cerium conversion layers (CeCL) have been investigated as a replacement for chromium conversion layers to protect Al alloys against corrosion. In this work the microstructure and the electrochemical behaviour of aluminium alloy 2024 with and without CeCL were investigated using, respectively, SEM-ED...
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Autor*in:	Palomino Luis Enrique M. [verfasserIn] Castro João Fábio W. de [verfasserIn] Aoki Idalina V. [verfasserIn] Melo Hercílio G. de [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2003

Schlagwörter:	AA2024 EIS EDX cerium conversion layer Cu content

Übergeordnetes Werk:	In: Journal of the Brazilian Chemical Society - Sociedade Brasileira de Química, 2017, 14(2003), 4, Seite 651-659
Übergeordnetes Werk:	volume:14 ; year:2003 ; number:4 ; pages:651-659

Links:	Link aufrufen Link aufrufen Journal toc

Katalog-ID:	DOAJ071455825

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spelling	(DE-627)DOAJ071455825 (DE-599)DOAJc34b1814d7af4229a46980334e5230f2 DE-627 ger DE-627 rakwb eng QD1-999 Palomino Luis Enrique M. verfasserin aut Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Cerium conversion layers (CeCL) have been investigated as a replacement for chromium conversion layers to protect Al alloys against corrosion. In this work the microstructure and the electrochemical behaviour of aluminium alloy 2024 with and without CeCL were investigated using, respectively, SEM-EDX and EIS. EDX results have shown that the presence of dispersed plated Cu particles on the alloy surface enhances the formation of the CeCL increasing the intensity of Ce peaks in the EDX spectra. EIS measurements on conversion-coated samples have shown that the presence of the layer increases the impedance, and that its presence is detected by the presence of a high frequency time constant. Results of potentiodynamic experiments have shown that the corrosion protection afforded by the conversion layer is due to the hindrance of the oxygen reduction reaction and that the pitting potential of the alloy is not changed. AA2024 EIS EDX cerium conversion layer Cu content Chemistry Castro João Fábio W. de verfasserin aut Aoki Idalina V. verfasserin aut Melo Hercílio G. de verfasserin aut In Journal of the Brazilian Chemical Society Sociedade Brasileira de Química, 2017 14(2003), 4, Seite 651-659 (DE-627)32461330X (DE-600)2028738-0 16784790 nnns volume:14 year:2003 number:4 pages:651-659 https://doaj.org/article/c34b1814d7af4229a46980334e5230f2 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532003000400024 kostenfrei https://doaj.org/toc/0103-5053 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2003 4 651-659
allfields_unstemmed	(DE-627)DOAJ071455825 (DE-599)DOAJc34b1814d7af4229a46980334e5230f2 DE-627 ger DE-627 rakwb eng QD1-999 Palomino Luis Enrique M. verfasserin aut Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Cerium conversion layers (CeCL) have been investigated as a replacement for chromium conversion layers to protect Al alloys against corrosion. In this work the microstructure and the electrochemical behaviour of aluminium alloy 2024 with and without CeCL were investigated using, respectively, SEM-EDX and EIS. EDX results have shown that the presence of dispersed plated Cu particles on the alloy surface enhances the formation of the CeCL increasing the intensity of Ce peaks in the EDX spectra. EIS measurements on conversion-coated samples have shown that the presence of the layer increases the impedance, and that its presence is detected by the presence of a high frequency time constant. Results of potentiodynamic experiments have shown that the corrosion protection afforded by the conversion layer is due to the hindrance of the oxygen reduction reaction and that the pitting potential of the alloy is not changed. AA2024 EIS EDX cerium conversion layer Cu content Chemistry Castro João Fábio W. de verfasserin aut Aoki Idalina V. verfasserin aut Melo Hercílio G. de verfasserin aut In Journal of the Brazilian Chemical Society Sociedade Brasileira de Química, 2017 14(2003), 4, Seite 651-659 (DE-627)32461330X (DE-600)2028738-0 16784790 nnns volume:14 year:2003 number:4 pages:651-659 https://doaj.org/article/c34b1814d7af4229a46980334e5230f2 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532003000400024 kostenfrei https://doaj.org/toc/0103-5053 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2003 4 651-659
allfieldsGer	(DE-627)DOAJ071455825 (DE-599)DOAJc34b1814d7af4229a46980334e5230f2 DE-627 ger DE-627 rakwb eng QD1-999 Palomino Luis Enrique M. verfasserin aut Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Cerium conversion layers (CeCL) have been investigated as a replacement for chromium conversion layers to protect Al alloys against corrosion. In this work the microstructure and the electrochemical behaviour of aluminium alloy 2024 with and without CeCL were investigated using, respectively, SEM-EDX and EIS. EDX results have shown that the presence of dispersed plated Cu particles on the alloy surface enhances the formation of the CeCL increasing the intensity of Ce peaks in the EDX spectra. EIS measurements on conversion-coated samples have shown that the presence of the layer increases the impedance, and that its presence is detected by the presence of a high frequency time constant. Results of potentiodynamic experiments have shown that the corrosion protection afforded by the conversion layer is due to the hindrance of the oxygen reduction reaction and that the pitting potential of the alloy is not changed. AA2024 EIS EDX cerium conversion layer Cu content Chemistry Castro João Fábio W. de verfasserin aut Aoki Idalina V. verfasserin aut Melo Hercílio G. de verfasserin aut In Journal of the Brazilian Chemical Society Sociedade Brasileira de Química, 2017 14(2003), 4, Seite 651-659 (DE-627)32461330X (DE-600)2028738-0 16784790 nnns volume:14 year:2003 number:4 pages:651-659 https://doaj.org/article/c34b1814d7af4229a46980334e5230f2 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532003000400024 kostenfrei https://doaj.org/toc/0103-5053 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2003 4 651-659
allfieldsSound	(DE-627)DOAJ071455825 (DE-599)DOAJc34b1814d7af4229a46980334e5230f2 DE-627 ger DE-627 rakwb eng QD1-999 Palomino Luis Enrique M. verfasserin aut Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Cerium conversion layers (CeCL) have been investigated as a replacement for chromium conversion layers to protect Al alloys against corrosion. In this work the microstructure and the electrochemical behaviour of aluminium alloy 2024 with and without CeCL were investigated using, respectively, SEM-EDX and EIS. EDX results have shown that the presence of dispersed plated Cu particles on the alloy surface enhances the formation of the CeCL increasing the intensity of Ce peaks in the EDX spectra. EIS measurements on conversion-coated samples have shown that the presence of the layer increases the impedance, and that its presence is detected by the presence of a high frequency time constant. Results of potentiodynamic experiments have shown that the corrosion protection afforded by the conversion layer is due to the hindrance of the oxygen reduction reaction and that the pitting potential of the alloy is not changed. AA2024 EIS EDX cerium conversion layer Cu content Chemistry Castro João Fábio W. de verfasserin aut Aoki Idalina V. verfasserin aut Melo Hercílio G. de verfasserin aut In Journal of the Brazilian Chemical Society Sociedade Brasileira de Química, 2017 14(2003), 4, Seite 651-659 (DE-627)32461330X (DE-600)2028738-0 16784790 nnns volume:14 year:2003 number:4 pages:651-659 https://doaj.org/article/c34b1814d7af4229a46980334e5230f2 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532003000400024 kostenfrei https://doaj.org/toc/0103-5053 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2003 4 651-659
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callnumber-first	Q - Science
author	Palomino Luis Enrique M.
spellingShingle	Palomino Luis Enrique M. misc QD1-999 misc AA2024 misc EIS misc EDX misc cerium conversion layer misc Cu content misc Chemistry Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys
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topic_title	QD1-999 Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys AA2024 EIS EDX cerium conversion layer Cu content
topic	misc QD1-999 misc AA2024 misc EIS misc EDX misc cerium conversion layer misc Cu content misc Chemistry
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title	Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys
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title_full	Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys
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title_sort	microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys
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title_auth	Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys
abstract	Cerium conversion layers (CeCL) have been investigated as a replacement for chromium conversion layers to protect Al alloys against corrosion. In this work the microstructure and the electrochemical behaviour of aluminium alloy 2024 with and without CeCL were investigated using, respectively, SEM-EDX and EIS. EDX results have shown that the presence of dispersed plated Cu particles on the alloy surface enhances the formation of the CeCL increasing the intensity of Ce peaks in the EDX spectra. EIS measurements on conversion-coated samples have shown that the presence of the layer increases the impedance, and that its presence is detected by the presence of a high frequency time constant. Results of potentiodynamic experiments have shown that the corrosion protection afforded by the conversion layer is due to the hindrance of the oxygen reduction reaction and that the pitting potential of the alloy is not changed.
abstractGer	Cerium conversion layers (CeCL) have been investigated as a replacement for chromium conversion layers to protect Al alloys against corrosion. In this work the microstructure and the electrochemical behaviour of aluminium alloy 2024 with and without CeCL were investigated using, respectively, SEM-EDX and EIS. EDX results have shown that the presence of dispersed plated Cu particles on the alloy surface enhances the formation of the CeCL increasing the intensity of Ce peaks in the EDX spectra. EIS measurements on conversion-coated samples have shown that the presence of the layer increases the impedance, and that its presence is detected by the presence of a high frequency time constant. Results of potentiodynamic experiments have shown that the corrosion protection afforded by the conversion layer is due to the hindrance of the oxygen reduction reaction and that the pitting potential of the alloy is not changed.
abstract_unstemmed	Cerium conversion layers (CeCL) have been investigated as a replacement for chromium conversion layers to protect Al alloys against corrosion. In this work the microstructure and the electrochemical behaviour of aluminium alloy 2024 with and without CeCL were investigated using, respectively, SEM-EDX and EIS. EDX results have shown that the presence of dispersed plated Cu particles on the alloy surface enhances the formation of the CeCL increasing the intensity of Ce peaks in the EDX spectra. EIS measurements on conversion-coated samples have shown that the presence of the layer increases the impedance, and that its presence is detected by the presence of a high frequency time constant. Results of potentiodynamic experiments have shown that the corrosion protection afforded by the conversion layer is due to the hindrance of the oxygen reduction reaction and that the pitting potential of the alloy is not changed.
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title_short	Microstructural and electrochemical characterization of environmentally friendly conversion layers on aluminium alloys
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