• A R HOSEINZADEH

      Articles written in Bulletin of Materials Science

    • Electrochemical, thermodynamic and theoretical study on anticorrosion performance of a novel organic corrosion inhibitor in 3.5% NaCl solution for carbon steel

      A R HOSEINZADEH S JAVADPOUR

      More Details Abstract Fulltext PDF

      The theoretical and electrochemical performance of a novel organic corrosion inhibitor 3,4$^{\prime}$-dihydro-3-[2$^{\prime}$-mercaptothiazolidine]indol-2-one (DMI), for API 5L Grade B carbon steel in 3.5% NaCl, was evaluated by potentiodynamic polarization (Tafel), electrochemical impedance spectroscopy (EIS) and density functional theory (DFT) for quantum chemical studies. Potentiodynamic studies confirmed that DMI was a mixed organic corrosion inhibitor type which specially affects the cathodic branch. The inhibition efficiencies of reactants, DMI and acetylcysteine followed the following order at 25$^{\circ}$C and 200 ppm: DMI (87%) > isatin (71%) > 2-thiazoline-2-thiol (62%) > acetylcysteine (54%). EIS measurementsillustrated the charge transfer controlled corrosion process. The Langmuir adsorption isotherm model of DMI was adopted. Surface studies were performed using scanning electron microscopy. Activation and adsorption thermodynamicparameters of DMI were computed. The magnitude of $\Delta G^{\circ}_{\rm ads}$ and the sign of $\Delta H^{\circ}_{\rm ads}$ concluded that the adsorption occurred through chemisorption. Quantum chemical calculations of four corrosion inhibitors were used for investigating the molecular structure effect on inhibition efficiency.

    • Formulation of a smart nanocomposite coating with pH-responsive loaded halloysite and investigation of its anticorrosion behaviour

      A R HOSEINZADEH S JAVADPOUR

      More Details Abstract Fulltext PDF

      In this research study, halloysite nanotubes (HNTs) were applied as nanocontainers to encapsulate the synthesized 3,4$^{\prime}$-dihydro-3-[2$^{\prime}$-mercaptothiazolidine]indol-2-one (DMI) molecules for corrosion protection of carbon steel in a 3.5% NaCl solution. Fourier transform infrared analysis was used to prove the loading of HNTs with DMI. Poly(ethylene-co-acrylic acid) and branched polyethylenimine polyelectrolyte layers were deposited on the surface of DMI-loaded HNTs by a layer by layer (LbL) method. The LbL deposition technique was verified by a zeta potential test. Release of DMI corrosion inhibitors from HNTs in alkaline pH was verified by using UV–visible spectroscopy results. Electrochemical impedance spectroscopy technique was applied to consider the anticorrosion ability of 1, 2.5 and 5 wt% DMI-loaded HNTs as smart epoxy coatings.

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.