Electrochemical impedance of nano-TiO2/polyurethane composite coatings

Yu Pang; Lei Xiong; Jianping Liu; Xinyi Li; Xiaogang Li

doi:10.11903/1002.6495.2015.357

Electrochemical impedance of nano-TiO₂/polyurethane composite coatings

Yu Pang^*
, Lei Xiong
, Jianping Liu
, Xinyi Li
, Xiaogang Li

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The effect of nano-TiO₂ and silane modified nano-TiO₂ on the corrosion resistance of polyurethane coating on 45# carbon steel in 3.5%NaCl solution was studied by means of electrochemical impedance spectroscopy (EIS) and field-emission scanning electron microscopy (FESEM). Results showed that the nano-TiO₂ particles aggregated to some extent, while the silane modified ones dispersed well in the polyurethane. The addition of the modified nano-TiO₂ could effectively improve the corrosion resistance of the polyurethane coatings. Among others, the polyurethane composite coating containing 3%(mass fraction) silane modified TiO₂ possessed the highest corrosion resistance with only one time constant on its impedance spectra. After immersion for 2880 h, the electrochemical impedance of the coating even kept at a level around 2.6×10⁸ Ω·cm².

Original language	English
Pages (from-to)	549-554
Number of pages	6
Journal	Corrosion Science and Protection Technology
Volume	28
Issue number	6
DOIs	https://doi.org/10.11903/1002.6495.2015.357
State	Published - 2016
Externally published	Yes

Keywords

EIS
FESEM
Nano-TiO
Polyurethane
Surface modification

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10.11903/1002.6495.2015.357

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title = "Electrochemical impedance of nano-TiO2/polyurethane composite coatings",

abstract = "The effect of nano-TiO2 and silane modified nano-TiO2 on the corrosion resistance of polyurethane coating on 45\# carbon steel in 3.5\%NaCl solution was studied by means of electrochemical impedance spectroscopy (EIS) and field-emission scanning electron microscopy (FESEM). Results showed that the nano-TiO2 particles aggregated to some extent, while the silane modified ones dispersed well in the polyurethane. The addition of the modified nano-TiO2 could effectively improve the corrosion resistance of the polyurethane coatings. Among others, the polyurethane composite coating containing 3\%(mass fraction) silane modified TiO2 possessed the highest corrosion resistance with only one time constant on its impedance spectra. After immersion for 2880 h, the electrochemical impedance of the coating even kept at a level around 2.6×108 Ω·cm2.",

keywords = "EIS, FESEM, Nano-TiO, Polyurethane, Surface modification",

author = "Yu Pang and Lei Xiong and Jianping Liu and Xinyi Li and Xiaogang Li",

year = "2016",

doi = "10.11903/1002.6495.2015.357",

language = "英语",

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pages = "549--554",

journal = "Corrosion Science and Protection Technology",

issn = "1002-6495",

publisher = "Elsevier B.V.",

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}

TY - JOUR

T1 - Electrochemical impedance of nano-TiO2/polyurethane composite coatings

AU - Pang, Yu

AU - Xiong, Lei

AU - Liu, Jianping

AU - Li, Xinyi

AU - Li, Xiaogang

PY - 2016

Y1 - 2016

N2 - The effect of nano-TiO2 and silane modified nano-TiO2 on the corrosion resistance of polyurethane coating on 45# carbon steel in 3.5%NaCl solution was studied by means of electrochemical impedance spectroscopy (EIS) and field-emission scanning electron microscopy (FESEM). Results showed that the nano-TiO2 particles aggregated to some extent, while the silane modified ones dispersed well in the polyurethane. The addition of the modified nano-TiO2 could effectively improve the corrosion resistance of the polyurethane coatings. Among others, the polyurethane composite coating containing 3%(mass fraction) silane modified TiO2 possessed the highest corrosion resistance with only one time constant on its impedance spectra. After immersion for 2880 h, the electrochemical impedance of the coating even kept at a level around 2.6×108 Ω·cm2.

AB - The effect of nano-TiO2 and silane modified nano-TiO2 on the corrosion resistance of polyurethane coating on 45# carbon steel in 3.5%NaCl solution was studied by means of electrochemical impedance spectroscopy (EIS) and field-emission scanning electron microscopy (FESEM). Results showed that the nano-TiO2 particles aggregated to some extent, while the silane modified ones dispersed well in the polyurethane. The addition of the modified nano-TiO2 could effectively improve the corrosion resistance of the polyurethane coatings. Among others, the polyurethane composite coating containing 3%(mass fraction) silane modified TiO2 possessed the highest corrosion resistance with only one time constant on its impedance spectra. After immersion for 2880 h, the electrochemical impedance of the coating even kept at a level around 2.6×108 Ω·cm2.

KW - EIS

KW - FESEM

KW - Nano-TiO

KW - Polyurethane

KW - Surface modification

UR - https://www.scopus.com/pages/publications/85010426687

U2 - 10.11903/1002.6495.2015.357

DO - 10.11903/1002.6495.2015.357

M3 - 文章

AN - SCOPUS:85010426687

SN - 1002-6495

VL - 28

SP - 549

EP - 554

JO - Corrosion Science and Protection Technology

JF - Corrosion Science and Protection Technology

IS - 6

ER -

Electrochemical impedance of nano-TiO₂/polyurethane composite coatings

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Keywords

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