Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

The influence of an antibiotic Co-Amoxiclavis studied for useas a low cost and ecofriendly corrosion inhibitor for mild steel in acidic environmentin particular to 1N hydrochloric acid medium. The corrosion inhibition effectand the performance of the inhibitorhasbeenextensively studied byweight loss studies, Tafelpolarization experiments, electrochemical impedance spectroscopy and hydrogen permeation measurements. The dosage of the antibiotic was varied from 5×10–4M to 15×10–4M. It has been established thatthe inhibitor performed well and showed 88% inhibition efficiency at 15×10–4Mconcentration of Co-Amoxiclavmolecules. The electrochemical studies such as Potentiodynamic polarization proposes thatthe antibiotic viz., Co-Amoxiclavacted as a mixed type of inhibitor. The increased charge transfer resistance and decreased double layer capacitance obtained from electrochemical impedance spectroscopyconfirmed that said antibiotic has performed as good inhibitor in 1N hydrochloric acid medium. Hydrogen permeation measurements showed that the compound acts as cathodic inhibitor, but predominantly under mixed control. It has been noticed that a definite correlation exists between chemical and electrochemical studiesfor the inhibition action ofCo-Amoxiclavmolecules on the corrosion of mild steel in 1N HCl medium. Diffused reflectance spectroscopy (DRS) studies established that only the mere adsorption of antibiotic on mild steel surface took place and not influence on the surface morphology. The adsorption of this compound on mild steel surface obeys Temkin’s adsorption isotherm.

Department of Design and Automation

School of Mechanical Engineering

Vellore Campus

Department of Manufacturing Engineering

Department of Information Technology

School of Information Technology and Engineering

Department of Chemistry

School of Advanced Sciences

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International Journal of Corrosion and Scale Inhibition

The influence of Co-Amoxiclav on the corrosion inhibition of mild steel in 1 N hydrochloric acid solution

The inhibitive action of dichlorphenamide [ DPD] on corrosion of Al 7075 in 4N Sulphuric acid has been studied using Mass loss, gasometric measurements, potentiodynamic polarization and impedance studies. The studies clearly demonstrated that DPD has performed as cathodic inhibitor. The adsorption of the compound on Al 7075 surface obeyed Temkin’s adsorption isotherm. Quantum mechanical indicies such as ELUMO,EHOMO, Energy gap and dipolement values validated the performance inhibitor for Al 7075 in acidic solution. © 2019 University of Manchester and the authors. Corrosion Science and Engineering. It will b.

Journal of Corrosion Science and Engineering

Quantum mechanical studies and corrosion inhibition of aluminium 7075 in aggressive acidic solution

A new plating bath has been optimized based on nickel, trivalent chromium and cobalt to improve micro hardness and corrosion resistance of zinc pressure die cast parts. The coating of Ni-Cr-Co on Zinc PDC flash replaces hard molybdenum and copper and its alloys used in gear and wheels in automobiles. Salt spray tests were performed to study the corrosion resistance of developed coatings on Zinc pressure die cast parts in sea water medium. The results are presented and discussed. © 2017 Elsevier Ltd.

Materials Today: Proceedings

Optimization and Characterization of electrodeposited Ni-Cr-Co coatings on Zinc Pressure die cast parts

VIT Unitversity

International Journal of Productivity and Quality Management

Non-conformity recovery and safe disposal by Poka Yoke and hallmarking in a piston unit

The metallization on FDM based plastic materials viz., ABS M30 rapid prototypes were performed by electrode position of nickel-trivalent chromium coatings with enhanced wear, hardness and tensile properties. Hardness values measured by Vickers hardness tested validated the improved mechanical properties. The presence of micro roughness and improved corrosion resistant values signify that the coatings have firmly absorbed on ABS M 30 plastics. The surface morphologies of Ni/Cr3+ coatings were found uniform and analyzed using XRD and XPS studies. © IAEME Publication.

World University root node

International Journal of Mechanical Engineering and Technology

Surface morphological studies of metallized plastics rapid prototypes

The analysis of hydrogen gas ingress during the corrosion of stainless steel in pickling acid such as 2N H2SO4 in the presence and absence of an ecofriendly inhibitor Thiamphenicol[TPC] has been carriedout using mass loss, gasometric and electrochemical studies. The antibiotic seems to be more effective in plummeting the dissolution of steel in 2N H2SO4. Potentiodynamic polarization clearly indicated that the inhibitor follows mixed mode of inhibition in 2N H2SO4 medium. Hydrogen permeation and EIS measurements have confirmed that the present antibiotic checks the dissolution of SS 304 efficiently in sulphuric acid. The theoretical values of EHOMO, ELUMO, ∆E and dipole moment in the presence of inhibitor established its effective adsorption on SS 304 metal surface. © 2017 University of Manchester and the authors.

Hydrogen permeation studies on the corrosion of stainless steel in acid medium using an eco-friendly inhibitor

Al 70 75 pressure die cast parts are being used as aircraft materials because of its low density and tensile strength. However, the uncoated PDC Al 7075 is showing lack of mechanical properties such as hardness, wear and corrosion resistances. In this paper the authors have attempted to improve the wear resistance and corrosion resistance of pressure die cast Al 7075 alloys by combining laser texturing and Zn-Co coatings. The surface roughness, micro hardness and wear resistance studies were evaluated and found that Zn-Co alloy plating on PDC Al 7075 could significantly improve the said mechanical properties. The coatings are found to with stand 620 hrs in sea water without the formation of corrosion products on its surface. © IAEME Publication.

The effect of electrodeposition zinc-cobalt alloy coatings on the mechanical properties of pressure die cast (pdc) al 7075

Al 7075 pressure die cast parts are being used as aircraft materials because of its high density and tensile strength. However, the uncoated PDC Al 7075 is showing lack of mechanical properties such as hardness, wear and corrosion resistances. We have attempted to improve the wear resistance and corrosion resistance of pressure die cast Al 7075 alloys by combining laser texturing and Zn-Ni coatings. The surface roughness, micro hardness and wear resistance studies were evaluated and found that Zn-Ni alloy plating on PDC Al 7075 could significantly improve the said mechanical properties. The coatings are found to with stand 620 hrs in sea water without the formation of corrosion products on its surface. © 2016, Sphinx Knowledge House. All rights reserved.

International Journal of ChemTech Research

Surface properties of pressure die cast(PDC) AL 7075 using laser texturing and electrodeposition zinc-nickel alloy coatings

The influence of substituents of thiourea on the stabilization effect of copper deposition has been studied by chemical and electrochemical methods. The stabilization action of the N-phenyl thiourea and N,N' diphenyl thiourea were screened by Anodic, cathodic polarization, and impedance measurements.The calculations of global reactivity indices of the additives such as the localization of frontier molecular orbital's, EHOMO, ELUMO, energy gap (ΔE) and dipole moment (μ) were used to substantiate the effective adsorption of the compounds on metal surface being responsible for stability of the bath.

Lectrochemical and quantum mechanical aspects of electroless copper plating process

The alloy Co-P coatings on hollow fly ash spheres have been successfully synthesized through electro less plating in this paper. The possible mechanism of electroless Co-P coating of cenosphere particles utilizing sodium hypophosphite activator was tried. The existence of Co and Co-P were confirmed by XRD (Xray diffraction analysis) and SEM (scanning electron microscopy) images. The cenosphere particles were characterized by energy-dispersive spectroscopy (EDX). The recommendation of coated fly ash for various industrial applications is done.