Pravin Deshpande | College Of Engineering Pune (original) (raw)

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Papers by Pravin Deshpande

Research paper thumbnail of Room Temperature Operating, Fast and Reusable Polyaniline Sensor Synthesized Ultrasonically Using Organic and Inorganic Acid Dopants

Journal of Macromolecular Science, Part B

Research paper thumbnail of Smart Coatings

Research paper thumbnail of Corrosion Prevention Mechanisms

Research paper thumbnail of Effect of ortho-phosphoric acid doping concentration on electrochemical properties of polyaniline coated low carbon steel

Materials Today: Proceedings, 2022

Research paper thumbnail of Principles of Electrochemical Corrosion

Corrosion Protection of Metals by Intrinsically Conducting Polymers, 2015

Research paper thumbnail of An Early Evidence of Hardening and Subsequent Tempering from Megalithic Sites, Maharashtra, India

Transactions of the Indian Institute of Metals, 2011

The Metallurgical investigations of ferrous objects excavated from the early Iron Age megalithic ... more The Metallurgical investigations of ferrous objects excavated from the early Iron Age megalithic site at Naikund and Mahurjhari in Vidarbha, Maharashtra, India were carried out The analysis shows a clear evidence of technological advance in the form of hardening and quenching followed by tempering in addition to the knowledge of steeling as early as 900 BC.

Research paper thumbnail of Electro Deposition of M-Amino Phenol on Low Carbon Steel and Corrosion Protection Studies

Galvanostatic deposition technique is used to obtain poly m-aminophenol coating on low carbon ste... more Galvanostatic deposition technique is used to obtain poly m-aminophenol coating on low carbon steel samples in basic hydroalcholic medium. These coatings were characterized by using FTIR spectroscopy and electrochemical methods. The existence of CO -C etheric and-NH2 groups in the FT-IR spectrum confirms presence of m-aminophenol.Corrosion rate of poly (m-aminophenol) in 3.5 % NaCl is found to be 2.14 mpy which is about two times lower than that of unpainted low carbon steel in neutral medium and coating protects steel by barrier mechanism.

Research paper thumbnail of Challenges in Clinical Translations

Research paper thumbnail of Smart Protective Coatings

Research paper thumbnail of Smart Coatings

Research paper thumbnail of Effects of conductive polymers (type and concentration) in coatings with zinc particles of different shapes

Journal of Coatings Technology and Research, 2019

The objective of this work was to compare the anticorrosion effects of organic coatings containin... more The objective of this work was to compare the anticorrosion effects of organic coatings containing zinc metal consisting of either lamellar particles or isometric particles and to reduce the zinc metal content of the coatings while preserving their high anticorrosion efficiency. The optimisation and Zn metal content reduction can be achieved using zinc with a lamellar particle shape and application of conductive polymers (CP). Conductive polymers are expected to of (PVCZn-sf) for the systems with spherical zinc. The pigment volume concentration (PVC) of the conductive polymers in the zinc-containing paints was (based on results obtained previously) 1%, 5%, and 10% in the systems with lamellar zinc and 1%, 5%, 10%, and 15% in the systems with spherical zinc. The organic coatings were subjected to accelerated cyclic corrosion tests and electrochemical measurements. The sample containing polyaniline carbonate (PVC=1%) and spherical zinc exhibited a significantly lower corrosion rate as compared to that of uncoated steel.

Research paper thumbnail of Strategies for Improving the Protective Efficiency of Coatings Based on Conducting Polymers

Research paper thumbnail of An Overview of Recent Developments in Coating Anticorrosion Technology Based on Conducting Polymers

Research paper thumbnail of Effects of Chloride Ions on the Corrosion Resistance of Conducting Polypyrrole Coated Steel in Simulated Concrete Pore Solution

Epoxy based paint containing conducting polypyrrole as a pigment was applied on low carbon steel ... more Epoxy based paint containing conducting polypyrrole as a pigment was applied on low carbon steel sample. By using Tafel polarization technique, corrosion rates of uncoated low carbon steel sample and painted low carbon steel sample, in 3.5 wt% NaCl were determined. The corrosion rate of conducting polypyrrole coated low carbon steel sample was found to be 0.09 mpy which is about 81 times lower than that of uncoated steel sample. A shift of 186 mV in the value of the corrosion potential in the positive direction indicates that the polypyrrole coating imparts corrosion protection by anodic protection. The uncoated and painted steel samples were immersed in simulated concrete pore solution and electrochemical studies were carried out. It was found that the passive film generated on uncoated low carbon steel sample in pore solution gets damaged with addition of chloride ions. As compared to uncoated low carbon sample, polypyrrole coated low carbon steel sample exhibits higher impedance ...

Research paper thumbnail of Corrosion Prevention Mechanisms

Corrosion Protection of Metals by Intrinsically Conducting Polymers, 2015

Research paper thumbnail of Effects of Chloride Ions on the Corrosion Resistance of Conducting Polypyrrole Coated Steel in Simulated Concrete Pore Solution

Epoxy based paint containing conducting polypyrrole as a pigment was applied on low carbon steel ... more Epoxy based paint containing conducting polypyrrole as a pigment was applied on low carbon steel sample. By using Tafel polarization technique, corrosion rates of uncoated low carbon steel sample and painted low carbon steel sample, in 3.5 wt% NaCl were determined. The corrosion rate of conducting polypyrrole coated low carbon steel sample was found to be 0.09 mpy which is about 81 times lower than that of uncoated steel sample. A shift of 186 mV in the value of the corrosion potential in the positive direction indicates that the polypyrrole coating imparts corrosion protection by anodic protection. The uncoated and painted steel samples were immersed in simulated concrete pore solution and electrochemical studies were carried out. It was found that the passive film generated on uncoated low carbon steel sample in pore solution gets damaged with addition of chloride ions. As compared to uncoated low carbon sample, polypyrrole coated low carbon steel sample exhibits higher impedance ...

Research paper thumbnail of Potentiostatic Deposition of Conducting Poly (aniline-co-o-anisidine) Coating on Low Carbon Steel and its Corrosion Performance

Conducting poly(aniline-co-o-anisidine) coatings were synthesized on low carbon steel by electroc... more Conducting poly(aniline-co-o-anisidine) coatings were synthesized on low carbon steel by electrochemical polymerization of aniline and o-anisidine in aqueous oxalic acid by using potentiostatic method. The characterization of these coatings were carried out by using scanning electron microscopy. The corrosion protection performance of these coatings were evaluated by using potentiodynamic polarization technique. It was found that uniform and adherent conducting poly (aniline-co-o-anisidine) coating can be obtained on low carbon steel using potentio static technique. The potentiodynamic polarization study reveals that the coating offers significant corrosion protection to low carbon steel in acidic medium.

Research paper thumbnail of Effect of gas nitrocarburizing post oxidation on electrochemical behaviour of AISI 4140 steel in neutral medium

Materials Today: Proceedings

Research paper thumbnail of Synthesis and characterization of NiO/ZnO composite prepared by solid-state reaction method

Materials Today: Proceedings

Research paper thumbnail of Impressed current cathodic protection (ICCP) of mild steel in association with zinc based paint coating

Materials Today: Proceedings

Research paper thumbnail of Room Temperature Operating, Fast and Reusable Polyaniline Sensor Synthesized Ultrasonically Using Organic and Inorganic Acid Dopants

Journal of Macromolecular Science, Part B

Research paper thumbnail of Smart Coatings

Research paper thumbnail of Corrosion Prevention Mechanisms

Research paper thumbnail of Effect of ortho-phosphoric acid doping concentration on electrochemical properties of polyaniline coated low carbon steel

Materials Today: Proceedings, 2022

Research paper thumbnail of Principles of Electrochemical Corrosion

Corrosion Protection of Metals by Intrinsically Conducting Polymers, 2015

Research paper thumbnail of An Early Evidence of Hardening and Subsequent Tempering from Megalithic Sites, Maharashtra, India

Transactions of the Indian Institute of Metals, 2011

The Metallurgical investigations of ferrous objects excavated from the early Iron Age megalithic ... more The Metallurgical investigations of ferrous objects excavated from the early Iron Age megalithic site at Naikund and Mahurjhari in Vidarbha, Maharashtra, India were carried out The analysis shows a clear evidence of technological advance in the form of hardening and quenching followed by tempering in addition to the knowledge of steeling as early as 900 BC.

Research paper thumbnail of Electro Deposition of M-Amino Phenol on Low Carbon Steel and Corrosion Protection Studies

Galvanostatic deposition technique is used to obtain poly m-aminophenol coating on low carbon ste... more Galvanostatic deposition technique is used to obtain poly m-aminophenol coating on low carbon steel samples in basic hydroalcholic medium. These coatings were characterized by using FTIR spectroscopy and electrochemical methods. The existence of CO -C etheric and-NH2 groups in the FT-IR spectrum confirms presence of m-aminophenol.Corrosion rate of poly (m-aminophenol) in 3.5 % NaCl is found to be 2.14 mpy which is about two times lower than that of unpainted low carbon steel in neutral medium and coating protects steel by barrier mechanism.

Research paper thumbnail of Challenges in Clinical Translations

Research paper thumbnail of Smart Protective Coatings

Research paper thumbnail of Smart Coatings

Research paper thumbnail of Effects of conductive polymers (type and concentration) in coatings with zinc particles of different shapes

Journal of Coatings Technology and Research, 2019

The objective of this work was to compare the anticorrosion effects of organic coatings containin... more The objective of this work was to compare the anticorrosion effects of organic coatings containing zinc metal consisting of either lamellar particles or isometric particles and to reduce the zinc metal content of the coatings while preserving their high anticorrosion efficiency. The optimisation and Zn metal content reduction can be achieved using zinc with a lamellar particle shape and application of conductive polymers (CP). Conductive polymers are expected to of (PVCZn-sf) for the systems with spherical zinc. The pigment volume concentration (PVC) of the conductive polymers in the zinc-containing paints was (based on results obtained previously) 1%, 5%, and 10% in the systems with lamellar zinc and 1%, 5%, 10%, and 15% in the systems with spherical zinc. The organic coatings were subjected to accelerated cyclic corrosion tests and electrochemical measurements. The sample containing polyaniline carbonate (PVC=1%) and spherical zinc exhibited a significantly lower corrosion rate as compared to that of uncoated steel.

Research paper thumbnail of Strategies for Improving the Protective Efficiency of Coatings Based on Conducting Polymers

Research paper thumbnail of An Overview of Recent Developments in Coating Anticorrosion Technology Based on Conducting Polymers

Research paper thumbnail of Effects of Chloride Ions on the Corrosion Resistance of Conducting Polypyrrole Coated Steel in Simulated Concrete Pore Solution

Epoxy based paint containing conducting polypyrrole as a pigment was applied on low carbon steel ... more Epoxy based paint containing conducting polypyrrole as a pigment was applied on low carbon steel sample. By using Tafel polarization technique, corrosion rates of uncoated low carbon steel sample and painted low carbon steel sample, in 3.5 wt% NaCl were determined. The corrosion rate of conducting polypyrrole coated low carbon steel sample was found to be 0.09 mpy which is about 81 times lower than that of uncoated steel sample. A shift of 186 mV in the value of the corrosion potential in the positive direction indicates that the polypyrrole coating imparts corrosion protection by anodic protection. The uncoated and painted steel samples were immersed in simulated concrete pore solution and electrochemical studies were carried out. It was found that the passive film generated on uncoated low carbon steel sample in pore solution gets damaged with addition of chloride ions. As compared to uncoated low carbon sample, polypyrrole coated low carbon steel sample exhibits higher impedance ...

Research paper thumbnail of Corrosion Prevention Mechanisms

Corrosion Protection of Metals by Intrinsically Conducting Polymers, 2015

Research paper thumbnail of Effects of Chloride Ions on the Corrosion Resistance of Conducting Polypyrrole Coated Steel in Simulated Concrete Pore Solution

Epoxy based paint containing conducting polypyrrole as a pigment was applied on low carbon steel ... more Epoxy based paint containing conducting polypyrrole as a pigment was applied on low carbon steel sample. By using Tafel polarization technique, corrosion rates of uncoated low carbon steel sample and painted low carbon steel sample, in 3.5 wt% NaCl were determined. The corrosion rate of conducting polypyrrole coated low carbon steel sample was found to be 0.09 mpy which is about 81 times lower than that of uncoated steel sample. A shift of 186 mV in the value of the corrosion potential in the positive direction indicates that the polypyrrole coating imparts corrosion protection by anodic protection. The uncoated and painted steel samples were immersed in simulated concrete pore solution and electrochemical studies were carried out. It was found that the passive film generated on uncoated low carbon steel sample in pore solution gets damaged with addition of chloride ions. As compared to uncoated low carbon sample, polypyrrole coated low carbon steel sample exhibits higher impedance ...

Research paper thumbnail of Potentiostatic Deposition of Conducting Poly (aniline-co-o-anisidine) Coating on Low Carbon Steel and its Corrosion Performance

Conducting poly(aniline-co-o-anisidine) coatings were synthesized on low carbon steel by electroc... more Conducting poly(aniline-co-o-anisidine) coatings were synthesized on low carbon steel by electrochemical polymerization of aniline and o-anisidine in aqueous oxalic acid by using potentiostatic method. The characterization of these coatings were carried out by using scanning electron microscopy. The corrosion protection performance of these coatings were evaluated by using potentiodynamic polarization technique. It was found that uniform and adherent conducting poly (aniline-co-o-anisidine) coating can be obtained on low carbon steel using potentio static technique. The potentiodynamic polarization study reveals that the coating offers significant corrosion protection to low carbon steel in acidic medium.

Research paper thumbnail of Effect of gas nitrocarburizing post oxidation on electrochemical behaviour of AISI 4140 steel in neutral medium

Materials Today: Proceedings

Research paper thumbnail of Synthesis and characterization of NiO/ZnO composite prepared by solid-state reaction method

Materials Today: Proceedings

Research paper thumbnail of Impressed current cathodic protection (ICCP) of mild steel in association with zinc based paint coating

Materials Today: Proceedings