Progress in Organic Coatings, ( ISI ), Volume (88), No (7), Year (2015-7) , Pages (106-115)

Title : ( Evaluation of corrosion resistance of polypyrrole/functionalized multi-walled carbon nanotubes composite coatings on 60Cu–40Zn brass alloy )

Authors: Ali Davoodi , Saleheh Honarbakhsh , Gholam Ali Farzi ,

Citation: BibTeX | EndNote

Abstract

Polypyrrole/multi-walled carbon nanotubes (PPy/MWCNT) and its carboxylic functionalized (PPy/MWCNT-COO−) composite films were successfully electropolymerized by cyclic voltammetry as protective coating against corrosion on 60Cu–40Zn brass alloy surface. It yielded to strongly adherent and smooth nanocomposite films. Kinetics of the corrosion protection was investigated in 3.5 wt% NaCl solutions by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization tests. The results showed that the presence of MWCNT in PPy coat considerably reduces the corrosion rate of 60Cu–40Zn brass alloy. The enhanced inhibition is most likely due to interaction between MWCNT and PPy. This in turn, improves the alloy passivation improvement and alters the permselectivity of the coating from anionic selectivity to the cationic selectivity. Moreover, PPy/MWCNT-COO− functionalized nanocomposite provided higher corrosion resistance coating than PPy/MWCNT alone.

Keywords

Functionalized carbon nanotube EIS Polypyrrole coating Smart coating Brass 60Cu–40Zn alloy
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@article{paperid:1048813,
author = {Davoodi, Ali and Saleheh Honarbakhsh and Gholam Ali Farzi},
title = {Evaluation of corrosion resistance of polypyrrole/functionalized multi-walled carbon nanotubes composite coatings on 60Cu–40Zn brass alloy},
journal = {Progress in Organic Coatings},
year = {2015},
volume = {88},
number = {7},
month = {July},
issn = {0300-9440},
pages = {106--115},
numpages = {9},
keywords = {Functionalized carbon nanotube EIS Polypyrrole coating Smart coating Brass 60Cu–40Zn alloy},
}

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%0 Journal Article
%T Evaluation of corrosion resistance of polypyrrole/functionalized multi-walled carbon nanotubes composite coatings on 60Cu–40Zn brass alloy
%A Davoodi, Ali
%A Saleheh Honarbakhsh
%A Gholam Ali Farzi
%J Progress in Organic Coatings
%@ 0300-9440
%D 2015

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