The corrosion behavior of epoxy coatings electrodeposited on aluminum, as well as on electrochemically and chemically modified aluminum were investigated during exposure to 3 % NaCl. Electrochemical impedance spectroscopy (EIS) and thermogravimetric analysis (TGA) were used for the determination of the protective properties of epoxy coatings on aluminum, anodized aluminum, phosphatized and chromatized-phosphatized aluminum. The protective properties of epoxy coatings on anodized and chromatized-phosphatized aluminum are significantly improved with respect to the same epoxy coatings on aluminum and phosphatized aluminum: higher values of the pore resistance and charge-transfer resistance, lower values of the coating capacitance, double-layer capacitance and relative permittivity (from EIS) smaller amount of absorbed water inside the coating (From TGA). On the other hand, the lower values of the ipdt temperature indicate a lower thermal stability of the epoxy coatings on anodized and chr...omatized-phosphatized aluminum.
Proučavano je koroziono ponašanje epoksidnih prevlaka dobijenih kataforetskim taloženjem na aluminijumu i elektrohemijski i hemijski modifikovanom aluminijumu tokom delovanja 3 % rastvora NaCl. Za određivanje zaštitnih osobina epoksidnih prevlaka na aluminijumu, anodiziranom aluminijumu, fosfatiranom i hromatno-fosfatiranom aluminijumu korišćene su metode spektroskopije elektrohemijske impedancije i termogravimetrijske analize. Zaštitne osobine epoksidnih prevlaka na anodiziranom i hromatno-fosfatiranom aluminijumu su značajno poboljšane u odnosu na iste epoksidne prevlake na aluminijumu i fosfatiranom aluminijumu: veće vrednosti otpornosti u porama prevlake i otpornosti prenosa naelektrisanja na graničnoj površini metal-elektrolit i manje vrednosti kapacitivnost prevlake, kapacitivnosti električnog dvojnog sloja i relativne permitivnosti prevlake (impedansna merenja) i manja količina absorbovane vode u prevlaci (termogravimetrijska analiza). S druge strane, manje vrednosti ipdt temper...ature ukazuju na manju termičku stabilnost epoksidnih prevlaka na anodiziranom i hromatno-fosfatiranom aluminijumu.
Keywords:
electrodeposition / epoxy coatings / aluminium / anodized aluminium / phosphatized and chromatized- phosphatized aluminium / corrosion / EIS / EIS
Source:
Journal of the Serbian Chemical Society, 2001, 66, 11-12, 871-880
TY - JOUR
AU - Mišković-Stanković, Vesna
AU - Lazarević, Zorica Ž.
AU - Kačarević-Popović, Zorica M.
PY - 2001
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/355
AB - The corrosion behavior of epoxy coatings electrodeposited on aluminum, as well as on electrochemically and chemically modified aluminum were investigated during exposure to 3 % NaCl. Electrochemical impedance spectroscopy (EIS) and thermogravimetric analysis (TGA) were used for the determination of the protective properties of epoxy coatings on aluminum, anodized aluminum, phosphatized and chromatized-phosphatized aluminum. The protective properties of epoxy coatings on anodized and chromatized-phosphatized aluminum are significantly improved with respect to the same epoxy coatings on aluminum and phosphatized aluminum: higher values of the pore resistance and charge-transfer resistance, lower values of the coating capacitance, double-layer capacitance and relative permittivity (from EIS) smaller amount of absorbed water inside the coating (From TGA). On the other hand, the lower values of the ipdt temperature indicate a lower thermal stability of the epoxy coatings on anodized and chromatized-phosphatized aluminum.
AB - Proučavano je koroziono ponašanje epoksidnih prevlaka dobijenih kataforetskim taloženjem na aluminijumu i elektrohemijski i hemijski modifikovanom aluminijumu tokom delovanja 3 % rastvora NaCl. Za određivanje zaštitnih osobina epoksidnih prevlaka na aluminijumu, anodiziranom aluminijumu, fosfatiranom i hromatno-fosfatiranom aluminijumu korišćene su metode spektroskopije elektrohemijske impedancije i termogravimetrijske analize. Zaštitne osobine epoksidnih prevlaka na anodiziranom i hromatno-fosfatiranom aluminijumu su značajno poboljšane u odnosu na iste epoksidne prevlake na aluminijumu i fosfatiranom aluminijumu: veće vrednosti otpornosti u porama prevlake i otpornosti prenosa naelektrisanja na graničnoj površini metal-elektrolit i manje vrednosti kapacitivnost prevlake, kapacitivnosti električnog dvojnog sloja i relativne permitivnosti prevlake (impedansna merenja) i manja količina absorbovane vode u prevlaci (termogravimetrijska analiza). S druge strane, manje vrednosti ipdt temperature ukazuju na manju termičku stabilnost epoksidnih prevlaka na anodiziranom i hromatno-fosfatiranom aluminijumu.
PB - Serbian Chemical Society, Belgrade
T2 - Journal of the Serbian Chemical Society
T1 - Electrochemical properties and thermal stability of epoxy coatings electrodeposited on aluminium and modified aluminium surfaces
T1 - Elektrohemijske karakteristike i termička stabilnost epoksidnih kataforetskih prevlaka na aluminijumu i modifikovanim površinama aluminijuma
EP - 880
IS - 11-12
SP - 871
VL - 66
UR - https://hdl.handle.net/21.15107/rcub_vinar_2486
ER -
@article{
author = "Mišković-Stanković, Vesna and Lazarević, Zorica Ž. and Kačarević-Popović, Zorica M.",
year = "2001",
abstract = "The corrosion behavior of epoxy coatings electrodeposited on aluminum, as well as on electrochemically and chemically modified aluminum were investigated during exposure to 3 % NaCl. Electrochemical impedance spectroscopy (EIS) and thermogravimetric analysis (TGA) were used for the determination of the protective properties of epoxy coatings on aluminum, anodized aluminum, phosphatized and chromatized-phosphatized aluminum. The protective properties of epoxy coatings on anodized and chromatized-phosphatized aluminum are significantly improved with respect to the same epoxy coatings on aluminum and phosphatized aluminum: higher values of the pore resistance and charge-transfer resistance, lower values of the coating capacitance, double-layer capacitance and relative permittivity (from EIS) smaller amount of absorbed water inside the coating (From TGA). On the other hand, the lower values of the ipdt temperature indicate a lower thermal stability of the epoxy coatings on anodized and chromatized-phosphatized aluminum., Proučavano je koroziono ponašanje epoksidnih prevlaka dobijenih kataforetskim taloženjem na aluminijumu i elektrohemijski i hemijski modifikovanom aluminijumu tokom delovanja 3 % rastvora NaCl. Za određivanje zaštitnih osobina epoksidnih prevlaka na aluminijumu, anodiziranom aluminijumu, fosfatiranom i hromatno-fosfatiranom aluminijumu korišćene su metode spektroskopije elektrohemijske impedancije i termogravimetrijske analize. Zaštitne osobine epoksidnih prevlaka na anodiziranom i hromatno-fosfatiranom aluminijumu su značajno poboljšane u odnosu na iste epoksidne prevlake na aluminijumu i fosfatiranom aluminijumu: veće vrednosti otpornosti u porama prevlake i otpornosti prenosa naelektrisanja na graničnoj površini metal-elektrolit i manje vrednosti kapacitivnost prevlake, kapacitivnosti električnog dvojnog sloja i relativne permitivnosti prevlake (impedansna merenja) i manja količina absorbovane vode u prevlaci (termogravimetrijska analiza). S druge strane, manje vrednosti ipdt temperature ukazuju na manju termičku stabilnost epoksidnih prevlaka na anodiziranom i hromatno-fosfatiranom aluminijumu.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical properties and thermal stability of epoxy coatings electrodeposited on aluminium and modified aluminium surfaces, Elektrohemijske karakteristike i termička stabilnost epoksidnih kataforetskih prevlaka na aluminijumu i modifikovanim površinama aluminijuma",
pages = "880-871",
number = "11-12",
volume = "66",
url = "https://hdl.handle.net/21.15107/rcub_vinar_2486"
}
Mišković-Stanković, V., Lazarević, Z. Ž.,& Kačarević-Popović, Z. M.. (2001). Electrochemical properties and thermal stability of epoxy coatings electrodeposited on aluminium and modified aluminium surfaces. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 66(11-12), 871-880.
https://hdl.handle.net/21.15107/rcub_vinar_2486
Mišković-Stanković V, Lazarević ZŽ, Kačarević-Popović ZM. Electrochemical properties and thermal stability of epoxy coatings electrodeposited on aluminium and modified aluminium surfaces. in Journal of the Serbian Chemical Society. 2001;66(11-12):871-880.
https://hdl.handle.net/21.15107/rcub_vinar_2486 .
Mišković-Stanković, Vesna, Lazarević, Zorica Ž., Kačarević-Popović, Zorica M., "Electrochemical properties and thermal stability of epoxy coatings electrodeposited on aluminium and modified aluminium surfaces" in Journal of the Serbian Chemical Society, 66, no. 11-12 (2001):871-880,
https://hdl.handle.net/21.15107/rcub_vinar_2486 .
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