Corrosion protection aspects of electrochemically synthesized poly(o-anisidine-co-o-toluidine) coatings on copper

Pawar, Pritee; Gaikwad, A.B.; Patil, Pradip

doi:10.1016/j.electacta.2007.03.043

Cited by 93 publications

(46 citation statements)

References 36 publications

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“…The effect of layers of poly (o-anisidine) (PVA) [39,40], poly (o-toluidine) (POT) and poly(o-anisidine-co-o-toluidine (OAOT) [40,41] formed on copper surface on copper behaviour in 3% NaCl solution has been reported. Results obtained indicate that they are efficient corrosion inhibitors and at concentration of 0.1M, inhibition efficiency obtained was 85.81%, 98.00% and 99.66% for POA, POT and OAOT respectively.…”

Section: Polymers As Corrosion Inhibitors For Coppermentioning

confidence: 99%

Polymers as Corrosion Inhibitors for Metals in Different Media - A Review

Umoren¹

2009

TOCORRJ

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Several works have been done and more are on the pipeline on the influence of organic compounds containing polar functions on the corrosion inhibition of metals in various aqueous media. Corrosion inhibition by such compounds is generally attributed to their adsorption on the metal/solution interface. The specific action of an inhibitor depends on the nature of its interaction with metal surface, which causes a change in either mechanism of the electrochemical corrosion process or in the surface area available for the process. Thus, factors such as physiochemical properties of the inhibitors, the nature and surface charge of the metal, solution composition and pH are important considerations. Polymers function as corrosion inhibitors because of their ability to form complexes through their functional groups with metal ions which occupy large area and by so doing blanket the metal surface from aggressive anions present in solution.

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Section: Polymers As Corrosion Inhibitors For Coppermentioning

confidence: 99%

Polymers as Corrosion Inhibitors for Metals in Different Media - A Review

Umoren¹

2009

TOCORRJ

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“…A disadvantage is that very small pores can be missed with this technique; it is also important to chose appropriate electrolyte (and indicator) composition and the duration of the test. Other electrochemical tests, such as Tafel extrapolation, cyclic voltammetry, linear polarization resistance and corrosion potential monitoring, are more quantitative and can be performed rapidly with standard electrochemical instrumentation [16][17][18]. Such techniques have been used to determine the percentage through-porosity in electroless nickel coatings on steel and aluminium substrates [19][20][21][22].…”

Section: Porosity Testsmentioning

confidence: 99%

Electrochemical characterisation of the porosity and corrosion resistance of electrochemically deposited metal coatings

Walsh

León

Kerr

et al. 2008

Surface and Coatings Technology

109

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Electrochemical techniques for the assessment of porosity in electrodeposited metal coatings are reviewed. The determination of porosity and corrosion, resistance is illustrated by electrochemical data from three coating/ substrate systems namely: electroless nickel on aluminium and steel and immersed gold coatings on an electroless copper-plated ABS polymer. Nickel coatings were up to 24 μm thick while gold deposits had thickness between 75 and 190 nm. Tafel extrapolation and linear polarisation resistance methods were used to determine the corrosion rate of the coated substrates. The aluminium samples were tested in 5% w/v (0.85 mol dm − 3 ) NaCl, while coated steel and ABS samples were immersed in 0.125 mol dm − 3 H 2 SO 4 and 0.1 mol dm − 3 NaBH 4 , respectively, at 295 K. Current vs. time curves and anodic polarisation behaviour have also been considered.

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“…However, the durability of the poly(aniline-2-anisidine) films is limited to 3 h. More recently, we synthesized poly(o-anisidine-co-o-toluidine) coatings on Cu from aqueous salicylate solution and investigated the corrosion properties of these copolymer coatings in aqueous 3% NaCl. 31 The corrosion rates of POA, POT and poly (o-anisidine-co-o-toluidine) (with feed ratio of o-toluidine as 0.5) coated Cu are found to be $9, 27, and 720 times lower than that observed for uncoated Cu.…”

Section: Introductionmentioning

confidence: 92%

Corrosion protective bi‐layered composites of polyaniline and poly(o‐anisidine) on low carbon steel

Chaudhari

Patil

2008

J of Applied Polymer Sci

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Bi-layered composites of polyaniline (PANI) and poly(o-anisidine) (POA) were investigated for corrosion protection of low carbon steel (LCS). In this work, homopolymers and bi-layers of PANI and POA were electropolymerized on LCS from an aqueous salicylate solution by using cyclic voltammetry. These coatings were characterized by cyclic voltammetry, Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). Corrosion tests were carried out in aqueous 3% NaCl solution for LCS coated with PANI, POA, bi-layered POA/PANI (POA on top of the PANI) or PANI/POA (PANI on top of the POA) composites using open circuit potential (OCP) measurements, potentiodynamic polarization technique, and electrochemical impedance spectroscopy (EIS). The single layer of PANI and POA protected the LCS in 3% NaCl for 8 and 16 h, respectively. The bi-layered composite coatings provide effective protection to LCS for a longer time than a single layered PANI or POA coating. However, the corrosion protection offered to LCS depends on the deposition order of polymer layers in the composite. The PANI/POA composite provides better protection to LCS against corrosion than POA/PANI coating.

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Corrosion protection aspects of electrochemically synthesized poly(o-anisidine-co-o-toluidine) coatings on copper

Cited by 93 publications

References 36 publications

Polymers as Corrosion Inhibitors for Metals in Different Media - A Review

Polymers as Corrosion Inhibitors for Metals in Different Media - A Review

Electrochemical characterisation of the porosity and corrosion resistance of electrochemically deposited metal coatings

Corrosion protective bi‐layered composites of polyaniline and poly(o‐anisidine) on low carbon steel

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