Comparative study on the electrodeposition and corrosion resistance of polypyrrole doped by phosphotungstate and benzalkonium chloride

Jinqiu Xu; Yanqing Zhang; Yongming Tang; Hui Cang; Wenheng Jing

doi:10.1021/ie502878a

Comparative study on the electrodeposition and corrosion resistance of polypyrrole doped by phosphotungstate and benzalkonium chloride

Jinqiu Xu, Yanqing Zhang, Yongming Tang, Hui Cang, Wenheng Jing

College of Chemical Engineering

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

9 Scopus citations

Abstract

Polypyrrole (PPy) coating and PPy composite coatings were successfully electrodeposited on mild steel in the electrolytes of oxalic acid in the absence and presence of dopants using cyclic voltammetry. Two types of doping ions were employed: phosphotungstate (PW₁₂O₄₀^3-) and benzalkonium chloride (BAC). Corrosion-resistant performances of the coatings in 0.1 M HCl showed that PPy composite coatings in the presence of phosphotungstic acid and BAC exhibit more effective protection for iron in comparison with PPy formed in 0.3 M oxalic acid, and corrosion resistance of PPy-BAC is better than PPy-PW₁₂ even though PPy-PW₁₂ shows nobler open-circuit potential for a longer period of time than PPy-BAC. Impedance measurements show that, after immersion of 12 h in 0.1 M HCl, the polarization resistances of PPy-PW₁₂ and PPy-BAC coatings reach 1860 and 3110 ω cm², respectively, compared to 640 ω cm² of PPy deposited from 0.3 M oxalic acid.

Original language	English
Pages (from-to)	18473-18480
Number of pages	8
Journal	Industrial and Engineering Chemistry Research
Volume	53
Issue number	48
DOIs	https://doi.org/10.1021/ie502878a
State	Published - 3 Dec 2014

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title = "Comparative study on the electrodeposition and corrosion resistance of polypyrrole doped by phosphotungstate and benzalkonium chloride",

abstract = "Polypyrrole (PPy) coating and PPy composite coatings were successfully electrodeposited on mild steel in the electrolytes of oxalic acid in the absence and presence of dopants using cyclic voltammetry. Two types of doping ions were employed: phosphotungstate (PW12O403-) and benzalkonium chloride (BAC). Corrosion-resistant performances of the coatings in 0.1 M HCl showed that PPy composite coatings in the presence of phosphotungstic acid and BAC exhibit more effective protection for iron in comparison with PPy formed in 0.3 M oxalic acid, and corrosion resistance of PPy-BAC is better than PPy-PW12 even though PPy-PW12 shows nobler open-circuit potential for a longer period of time than PPy-BAC. Impedance measurements show that, after immersion of 12 h in 0.1 M HCl, the polarization resistances of PPy-PW12 and PPy-BAC coatings reach 1860 and 3110 ω cm2, respectively, compared to 640 ω cm2 of PPy deposited from 0.3 M oxalic acid.",

author = "Jinqiu Xu and Yanqing Zhang and Yongming Tang and Hui Cang and Wenheng Jing",

note = "Publisher Copyright: {\textcopyright} 2014 American Chemical Society.",

year = "2014",

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doi = "10.1021/ie502878a",

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T1 - Comparative study on the electrodeposition and corrosion resistance of polypyrrole doped by phosphotungstate and benzalkonium chloride

AU - Xu, Jinqiu

AU - Zhang, Yanqing

AU - Tang, Yongming

AU - Cang, Hui

AU - Jing, Wenheng

PY - 2014/12/3

Y1 - 2014/12/3

N2 - Polypyrrole (PPy) coating and PPy composite coatings were successfully electrodeposited on mild steel in the electrolytes of oxalic acid in the absence and presence of dopants using cyclic voltammetry. Two types of doping ions were employed: phosphotungstate (PW12O403-) and benzalkonium chloride (BAC). Corrosion-resistant performances of the coatings in 0.1 M HCl showed that PPy composite coatings in the presence of phosphotungstic acid and BAC exhibit more effective protection for iron in comparison with PPy formed in 0.3 M oxalic acid, and corrosion resistance of PPy-BAC is better than PPy-PW12 even though PPy-PW12 shows nobler open-circuit potential for a longer period of time than PPy-BAC. Impedance measurements show that, after immersion of 12 h in 0.1 M HCl, the polarization resistances of PPy-PW12 and PPy-BAC coatings reach 1860 and 3110 ω cm2, respectively, compared to 640 ω cm2 of PPy deposited from 0.3 M oxalic acid.

AB - Polypyrrole (PPy) coating and PPy composite coatings were successfully electrodeposited on mild steel in the electrolytes of oxalic acid in the absence and presence of dopants using cyclic voltammetry. Two types of doping ions were employed: phosphotungstate (PW12O403-) and benzalkonium chloride (BAC). Corrosion-resistant performances of the coatings in 0.1 M HCl showed that PPy composite coatings in the presence of phosphotungstic acid and BAC exhibit more effective protection for iron in comparison with PPy formed in 0.3 M oxalic acid, and corrosion resistance of PPy-BAC is better than PPy-PW12 even though PPy-PW12 shows nobler open-circuit potential for a longer period of time than PPy-BAC. Impedance measurements show that, after immersion of 12 h in 0.1 M HCl, the polarization resistances of PPy-PW12 and PPy-BAC coatings reach 1860 and 3110 ω cm2, respectively, compared to 640 ω cm2 of PPy deposited from 0.3 M oxalic acid.

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U2 - 10.1021/ie502878a

DO - 10.1021/ie502878a

M3 - 文章

AN - SCOPUS:84915758695

SN - 0888-5885

VL - 53

SP - 18473

EP - 18480

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 48

ER -

Comparative study on the electrodeposition and corrosion resistance of polypyrrole doped by phosphotungstate and benzalkonium chloride

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