Potentiodynamic deposition of poly (o-anisidine-co-metanilic acid) on mild steel and its application as corrosion inhibitor

Kumar, Piyush; Kalpana, D.; Renganathan, N.G.; Pitchumani, S.

doi:10.1016/j.electacta.2008.07.054

Cited by 27 publications

(12 citation statements)

References 28 publications

(28 reference statements)

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“…The inner anion doping determines many distinctive properties of self-doped polyaniline (PANI), which differs from those of the parent polyaniline [11]. In this work, poly(o-anisidine) is selected as one monomer of the aniline family due to its higher solution processability [12]. Studies related to the copolymerization of anisidine are limited and its compatibility with metanilic acid is expected to yield a product different from aniline.…”

Section: Introductionmentioning

confidence: 99%

New, low-cost, high-power poly(o-anisidine-co-metanilic acid)/activated carbon electrode for electrochemical supercapacitors

Kalpana¹,

Lee²,

Sato³

2009

Journal of Power Sources

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Section: Introductionmentioning

confidence: 99%

New, low-cost, high-power poly(o-anisidine-co-metanilic acid)/activated carbon electrode for electrochemical supercapacitors

Kalpana¹,

Lee²,

Sato³

2009

Journal of Power Sources

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“…Thus, copper is reduced easily. In consequence, it is necessary to passivate the metal surface in order to achieve the electrodoposition of the conducting polymer (Rajkumar et al , 2008; Quraishi and Shukla, 2009). The −SO 3 H group incorporated in the backbone of the polyaniline chain by self‐doping compensates for the positive charge of the protonated nitrogen atoms in the polymer, thus dopant anions are replaced by −SO 3 H. Self‐doped polyaniline can be synthesized both by electrochemical and chemical polymerization approaches.…”

Section: Introductionmentioning

confidence: 99%

Electropolymerization of p‐toluene sulfonic acid doped polyaniline on copper and its application as a corrosion inhibitor

Rashid

Rahim

Noordin

2011

Anti-Corrosion Methods and Materials

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PurposeThe purpose of this paper is to study the inhibitive effect of p‐toluene sulfonic acid (p‐TSA) doped polyaniline on corrosion of copper in 0.1 M hydrochloric acid (HCl) solution.Design/methodology/approachThe electrochemical deposition of polyaniline doped with p‐TSA on pure copper metal was studied potentiodynamically. The electrochemical study of the working electrode was performed at open‐circuit potential, then using potentiodynamic polarization and also with electrochemical impedance spectroscopy in 0.1 M HCl solution. The p‐TSA doped polymer deposit was characterized using Fourier transform infrared spectroscopy, with the UV‐vis and thermogravimetric analysis/differential scanning calorimetry techniques. The morphology of the deposited polymer was studied by scanning electron microscopy.FindingsThe results revealed that the p‐TSA self‐doped polymer had better corrosion inhibition efficiency than did the un‐doped polyaniline. It exhibited approximately 88.9 percent inhibition efficiency at 2x10−3 M concentration of p‐TSA, according to charge transfer resistance (Rct) values evaluated from Nyquist plots.Research limitations/implicationsThe high dissolution tendency of metal surfaces generally occurs before the electropolymerization potential of the monomer is achieved. It was difficult to electrodeposit the conducting organic polymer on the surface of metal.Practical implicationsSome organic conducting polymers are toxic and hazardous from the environmental viewpoint. The electrochemical deposition of p‐TSA doped polyaniline is impractical for larger structures.Originality/valueThe paper demonstrates that p‐TSA doped polyaniline is environmentally benign and can be used for the protection of copper metal as a cathodic inhibitor.

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“…6 The applicability of an organic compound as a successful inhibitor depends mainly on its ability to get adsorbed on the metal surface by displacing the adsorbed water molecules at the interface and forming a compact barrier film. 7-10 Mostly amine containing or conjugated polymers have been reported in the literature [11][12][13][14][15][16] but, so far, there is no report of polyurethane as corrosion inhibitor. Polyurethane is well-known coating resin [17][18][19][20] and has potential for its use as corrosion inhibitor after suitably modifying the polymer by generating ionic groups in the main chain to make them conducting in the solution phase.…”

Section: Introductionmentioning

confidence: 98%

Effects of Nanoclay and Polyurethanes on Inhibition of Mild Steel Corrosion

Banerjee¹,

Mishra²,

Singh³

et al. 2011

j nanosci nanotechnol

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Sulfonated polyurethanes (SPU) were used as corrosion inhibitor for mild steel in acidic solution. The sulfonation of the > N-H groups of the urethane linkages was confirmed from Nuclear Magnetic Resonance (NMR) and Fourier Transform Infra Red (FTIR) spectroscopic techniques. The inhibition efficiency of sulfonated polyurethanes, prepared from two different routes, was investigated using different techniques. The effects of microstructure of polyurethane (PU), degree of sulfonation, time of immersion and temperature on the inhibition of corrosion were discussed. The disc-like nanoparticles, so-called nanoclay, either suspended or chemically attached to SPU chains (nanocomposites) dramatically enhanced the inhibition efficiency for mild steel in acidic medium. All the inhibitors retard the corrosion rate by getting themselves adsorbed on the corroding surface by following the Langmuir adsorption isotherm. The surface analysis of inhibited and uninhibited samples was performed using Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). Among the various inhibitors used, the nanocomposite of polyurethane was the most effective. Molecular modeling helped in determining the extent of packing of the SPU chains leading to better inhibition efficiency.

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Potentiodynamic deposition of poly (o-anisidine-co-metanilic acid) on mild steel and its application as corrosion inhibitor

Cited by 27 publications

References 28 publications

New, low-cost, high-power poly(o-anisidine-co-metanilic acid)/activated carbon electrode for electrochemical supercapacitors

New, low-cost, high-power poly(o-anisidine-co-metanilic acid)/activated carbon electrode for electrochemical supercapacitors

Electropolymerization of p‐toluene sulfonic acid doped polyaniline on copper and its application as a corrosion inhibitor

Effects of Nanoclay and Polyurethanes on Inhibition of Mild Steel Corrosion

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