Qualification: 
Ph.D, MPhil, MSc
n_poongothai@cb.amrita.edu

Dr. Poongothai N. currently serves as Assistant Professor in Chemistry, Department of Sciences, School of Engineering, Coimbatore Campus. Her areas of research include Corrosion Inhibitors.

Research Interests

Studies on the inhibition efficiency of natural products on corrosion of metals in various environments using different techniques- weight loss methods and electrochemical techniques.

Academic Profile

Work Experience

Since 2007 - Present Amrita Vishwa Vidyapeetham, Amrita School of Engineering, Ettimadai, Coimbatore, Tamilnadu, India.
2004 - 2006 Michael Job Arts and Science College, Sulur, Coimbatore, Tamilnadu, India.
2000 - 2002 Government Polytechnique College, Coimbatore, Tamilnadu, India.
1992 - 1997 ARC Mat. Hr.  School, Somanur, Coimbatore, Tamilnadu,    India.

Fields of Specialization

2003 - 2006 Ph. D: Vapour Phase corrosion inhibitors (VCI)-Physical Chemistry
2000 - 2002 M. Phil: Acid Pickling Inhibitors)-Physical Chemistry
1986 – 1988 M.Sc.: Studies on the effect of electrolytes on the critical solution temperature (CST) of Phenol water system.
1984 - 1985 B.Sc: Estimation of the amount of vitamin – C (Ascorbic acid)– By quantitative analysis method )-Inorganic Chemistry

Affiliation(s)

  • Amrita Vishwa Vidyapeetham, Coimbatore Campus

Educational Qualification

2008 Ph. D
PSG College of Technology, Coimbatore, Anna University
1988 M. Sc
Sri Saradha College for women, Salem, Chennai University..
1985 B. Sc.
Sri Seethalakshmi Ramasamy College, Trichy, Bharathidhasan University

Research Interest

  • Area of interest: Corrosion Science

Teaching

  • UG Theory:
    • B. Tech first year Chemistry I
    • B. Tech Elective: Corrosion Science, Nano materials and its applications, Fuels and combustion
    • Integrated M. Sc: Chemistry I & II
  • PG/Ph.D Theory :
    • Corrosion Science, Nano materials and its applications
  • UG Labs
    • B. Tech first year Chemistry lab
    • Integrated M. Sc: Chemistry Lab: I & II

Skill Set 

  • Experience in Corrosion Rate and inhibition efficiency determination by various weight loss methods and electrochemical methods (Tafel and A C impedance techniques)
  • Extract preparation from natural and synthetic inhibitors by distillation process
  • Analysis and interpretation of analytical data comprising of NMR, IR and UV
  • Analysis and interpretation of analytical data comprising quantitative analysis methods

Instruments Handled

  • Experimental experience in using Keithley instrument-2001- EG 2G PAR-173 potentiostat and PAR Impedance electrochemical analyzer-M6310
  • Experimental experience in using SEM, UV-Visible, FTIR and NMR Spectroscopy

Membership

  • NACE International
  • Indian council of chemist – LF 1186
  • International Solid state Chemistry and Applied Sciences (ISCAS)- LM-359

Publications

Publication Type: Journal Article

Year of Publication Title

2019

P. K. Neena, Poongothai, N., and Abhirami, P. R., “Efficiency Of Acid Extracts Of AlstoniaSchoalris Leaves On Mild Steel In Acid Medium As Pickling Inhibitor”, Asian Journal of Chemistry, vol. 31, 12 vol., pp. 2745-2752, 2019.[Abstract]


This work aims to find the inhibition efficiency of Alstonia schoalris leaves on mild steel in 1N HCl medium. Corrosion monitoring was
done using weight loss method, potentiodynamic polarization studies like Tafel and impedance studies and the results shows that the
inhibitor acts well on mild steel in acidic medium. Polarization studies show that the inhibitor behaves like a mixed type. The inhibitor
was characterized using FTIR which showed the presence of hetero atoms in the inhibitor molecule that get adsorbed on metal surface and
provided better efficiency and that was proven by different adsorption isotherm. Zeta potential showed the stability of particle in the
medium. Surface analysis of specimen was studied using FESEM, EDX and contact angle measurements. The analysis showed that the
surface exposed to inhibitor is less corroded and contact angle measurement showed hydrophilic nature of the surface.

More »»

2018

N. Poongothai, “Nano Composite Polymer Resin Coating to Control Mild Steel Corrosion in Marine Environment”, International Journal of Applied Chemistry, vol. 6, pp. 102-125, 2018.[Abstract]


The present study was carried out to analyze the performance of anti-corrosion property for the combination of PMMA, resin and ZnO nano particle coating on mild steel in 3.5% NaCl medium at 3hrs, 6hrs and 12hrs exposure. The synthesized nano particle was characterized by FTIR, XRD and SEM analysis. The Polymer +Resin +ZnO (PRZn) combination was coated on MS by dip and spin coating methods. The optimized concentration analyses were verified by visual observation and gravimetric method which were also confirmed by electrochemical studies such as Tafel, AC impedance studies and cyclic voltammetry studies and 10% PMMA and 10% PMMA-resin combination was identified as optimum concentration. So, 10% PMMA-resin combined with 0.1g ZnO was used for further studies and coated on MS and PRZn coating offered almost cent percent corrosion protection of MS upto 12hrs exposure in 3.5% NaCl. PRZn coating was characterized by using FTIR, XRD, Zeta potential measurements and thermal stability was analyzed by thermo gravimetric methods. The high I.E offered by the coating material was due to the presence of major constituents that forms a passive film on the metal surface that protects mild steel from corrosion was identified. Profilometer analysis shows that the thickness and roughness of polymer coated specimen is less than paint coated one. Zeta potential and contact angle measurements of the combination coating material shows a protection against corrosion due to more interfacial tension and reduced size of the particles on the metal surface.

More »»

2018

N. Poongothai, “Performance Of Nanometal Oxide Polymer Resin Coating On Mild Steel Corrosion In Acid And Marine Environments”, 2018.

2018

N. Poongothai, “Five Natural Essential Oil As VCI For Electrical And Electronic Components Under Marine Environment”, 2018.

2018

N. Poongothai, “Acid Extracts Of Nerium Oderum (Leaves) As Pickling Inhibitor On Corrosion Of Mild Steel In Acidic Medium”, 2018.

2018

N. Poongothai, “Beneficial Role Of Acid Extracts Of NeriumOderum (Leaves) On Corrosion Of Mild Steel In Acidic Medium”, 2018.

2018

R. Athira, Poongothai, N., Neena, P. K., Babu, T. G. Sateesh, and John Stanley, “Study Of Corrosion Protection Effect of Low Cost Bio Extract- Polymer Coating Material for Mild Steel in Acidic and Marine Environments-a Cost Effective Approach”, International Journal of Engineering & Technology, vol. 7, pp. 315–321 doi = 10.14419/ijet.v7i3.6.15123, 2018.[Abstract]


<p>The present study was carried out to analyze the performance of an anti-corrosion coating obtained from Carica Papaya extract and PMMA polymer applied on mild steel. This combination was characterized by using FTIR, XRD, Zeta potential measurements and thermogravimetric methods and the presence of major constituents in papaya extract was identified with the functional groups and hetero atoms which able to forms a passive film on the metal surface and protects mild steel from corrosion. These results were verified by visual observation and gravimetric method and then confirmed by electrochemical studies such as Tafel and AC impedance studies. Cyclic voltammetry result study showed that papaya extract confers electroactive property to the polymer. Zeta potential and contact angle measurements of this extract and coating material reinforce protection against corrosion due to high potential&amp; more interfacial tension of the metal surface and hydrophobic nature of film, which repulse the water drops on metal surface, thus giving more adherent, non-porous film.</p>

More »»

2014

N. Poongothai, Murugavel, S. C., and T. Ramachandran, “Studies on Jasiminum grandiflorumas VCI for mild steel in marine environment”, International Journal of Advance Research, IJOAR, vol. 2, no. 7, 2014.

2014

N. Poongothai, Murugavel, S. C., and T. Ramachandran, “Corrosion Inhibitive Effect of Five Essential Oils on Copper in Seawater, Rainwater, and Industrial Environments”, International Journal of Chemistry and Chemical Engineering, vol. 4, pp. 23-34, 2014.

2010

N. Poongothai, Murugavel, S. C., Natesan, M., and T. Ramachandran, “Essential oils as vapour phase corrosion inhibitors for mild steel in seawater, rainwater, SO2 and H2S environments”, Material Performance Journal, 2010.

2010

N. Poongothai, Ramachanderen, T., Natesan, M., and Murugavel, S. C., “The Performance of VCI Coated Paper for Corrosion Prevention of Copper in HCl Environment”, Asian Journal of Research in Chemistry, vol. 3, pp. 472–476, 2010.[Abstract]


The performance of five essential oils has been used to study the corrosion prevention of copper by weight loss and electrochemical polarization methods. Results showed that the inhibition efficiency depends upon the concentration of inhibitors as well as that of acid. The essential oils reduce the corrosion of copper in HCl environment more effectively in 4% concentration. This is due to adsorption of inhibitor molecules on metal surface, which is proved by Tempkin adsorption isotherm. The electrochemical polarization result revealed that inhibitors are of mixed type in nature. More »»

2010

N. Poongothai, Ramachanderen, T., Murugavel, S. C., and Natesan, M., “Essential oils as VCIs for mild steel in various environments”, Materials Performance, vol. 49, pp. 50-55, 2010.[Abstract]


The corrosion vapor inhibition efficiency (IE) of five essential oils was investigated for mild steel in seawater, rainwater, sulfur dioxide (SO 2), and hydrogen sulfide (H2S) environments by weight loss and electrochemical methods. The highest IE was observed in all the tests at an inhibitor concentration of4%. The tests also indicated that the five oils act as mixed inhibitors but cathodic inhibition was more predominant. The surface of the specimens was investigated using scanning electron microscopy. More »»

2009

N. Poongothai, Natesan, M., Murugavel, S. C., and T. Ramachandran, “Essential Oils as VCI for mild steel in HCl environment”, Material Performance Journal, pp. 52-57, 2009.

2009

N. Poongothai, Ramachanderen, T., Natesan, M., and Murugavel, S. C., “Corrosion Inhibition of Mild Steek by Essential Oils in an HCl Environment”, Materials Performance, pp. 56-57, 2009.

2007

N. Poongothai, Natesan, M., Palanisamy, N., Murugavel, S. C., and T. Ramachandran, “Azole, amine and nitrite as vapour phase corrosion inhibitors of metals in NaCl & SO2 environment”, Indian Journal of Chemical Technology, vol. 12, pp. 427-431, 2007.

2007

N. Poongothai, Natesan, M., Palanisamy, N., Murugavel, S. C., and T. Ramachandran, “Azole, amine, benzoate and nitrate compound mixture as VPI for metals in NaCl and SO2 environments”, Indian Journal of Chemical Technology, vol. 14, pp. 481–487, 2007.[Abstract]


A variety of tests were performed to evaluate the feasibility of vapour phase corrosion inhibitor’s (VPI’s) application for maintenance and protection of transporting metal articles from corrosion damage. Three types of VPI were evaluated for their inhibition characteristics for mild steel (MS) and copper. Minimum dosage of one g/L is required for protections of both metals. Influence of SO₂ and chloride contamination on inhibitor performance was also investigated. The corrosion behaviour of MS and Cu in sodium chloride (0.005 M NaCl) environment in presence of VPI impregnated and unimpregnated paper has been studied by using weight loss, potentiodynamic polarization and A.C impedance spectroscopic methods. It has been found that 1g L⁻¹ of VPI impregnated on Kraft paper provides nearly 98% inhibition efficiency for mild steel and copper in 0.005 M NaCl environment. More »»

2005

N. Poongothai, Rajendran, P., Natesan, M., and Palaniswamy, N., “Wood bark oils as vapour phase corrosion inhibitors for metals in NaCl and SO2 environments”, Indian journal of chemical technology, vol. 12, pp. 641-647, 2005.[Abstract]


Wood bark oils of Cassia siamea-gonrai (CS), Cassia auriculata (CA), Crataeva religiosa (CR) and Strychnos nux-vomica (SNV) were extracted from the dry bark. These highly volatile oils are used as a vapour phase corrosion inhibitors (VPI) for mild steel and copper in sodium chloride and sulphur dioxide environments. The inhibition efficiency of these wood bark oils has been examined by using weight loss, potentiodynamic polarization and A.C. impedance spectroscopic methods. It has been found that the inhibition capability of these oils increases with increase in concentration from 0.4 to 4%. The results indicate that the bark oils have significant inhibitive effect. This is due to adsorption of inhibitor molecule on the metal surface. At higher concentration (8%) of the inhibitor, there is decrease in inhibition efficiency. It may be due to the formation of soluble metal-inhibitor complex in the salt environments. It has also been found that 4% concentration of these inhibitors offered, above 90% inhibition efficiency for both mild steel and copper. More »»

Publication Type: Conference Proceedings

Year of Publication Title

2018

N. Poongothai, Athira, R., and Neena, P. K., “A green approach to preparing bio-inhibitor for mild steel corrosion in different acid mediums”, International Journal of Engineering and Technology(UAE), vol. 7. Science Publishing Corporation Inc, pp. 322-329, 2018.[Abstract]


Inhibition efficiency (I. E) of various concentrations of Carica Papaya (C. P)extracts on the corrosion of mild steel (MS) in 1M HCl and 0.5M H2SO4medium was investigated by weight loss and electrochemical methods at room temperature and elevated temperature. Acid extract of C. P was characterized by using FTIR and XRD spectral studies to identify the major constituents present in it. Zeta potential and EDAX analysis were carried out for the extract to identify electrochemical aspect of a particle's surface, and information about a particle's dispersibility, aggregability, and adhesion ability can be obtained from this measurement. Surface analysis studies such as FESEM and contact angle measurement were carried out for the C. P extracts to locate the surface coverage of the inhibitor and confirm the hydrophilic nature on the metal surface. Langmuir and Temkin adsorption isotherm confirm the mono layer adsorption and heterogeneity of the MS surface. Thermodynamic data's such as activation energy, Gibbs free energy, enthalpy and entropy changes were calculated using weight loss measurements data at room as well as elevated temperatures and identified free energy of adsorption and exothermic reaction taking place during corrosion process. Phytochemical studies confirm the presence of chemical constituents with hetero atom that provide more I.E due to its adsorption of inhibitor on metal surface. © 2018 Authors.

More »»

2010

N. Poongothai, “Corrosion inhibition of essential oils on copper in seawater, rain water, SO2 and H2S environment”, National Conference on Recent Advances in Electroanalytical Techniques. GandhigramRural Institute- Deemed University, Gandhigram , 2010.

2010

N. Poongothai, “Introduction to synthesis of nano materials by different techniques”, National Conference on Current trends in Chemistry NCCTC-10. BharathiarUniversity, Coimbatore , 2010.

2009

N. Poongothai, “Introduction to nanomaterials and Nanosciences”, National symposium and seminar – Solid state Chemistry and Nanomaterials . Vellore College of Technology, Vellore, 2009.

2009

N. Poongothai, “Studies on essential oils as VCI for mild steel in marine atmosphere”, National Conference on Corrosion Assessment and its Control- (NCAC 09) . Thiyagaraja College, Madurai, 2009.

2006

N. Poongothai, “Bioinformatics in drug discovery”, National seminar on “Emerging trends and developments in bioinformatics . Dr. G. R. Damodaran College of science, Coimbatore, 2006.

Conferences/Workshops/Seminars

  • Present a poster on April 17th, 2015 in Corrosion Awareness Day 2015 (CAD15) in THE GANDHIGRAM RURAL INSTITUTE DEEMED UNIVERSITY, Gandhigram.
  • Seminar participated on Feb 3-5, 2015, Indo-French Seminar on Women in Science” through CEFIPRA, at IISc, Bangalore.
  • Workshop attended- on Jan 30 -31, 2014, ‘Sort Term Traning course on Corrosion and its Control, at SRM University, Kattankulathur, Chennai.
  • Akash- Faculty development programs in Amrita Vishwa Vidyapeetham, Coimbatore on December, 2013.
  • International Conference on "Nanomaterials and Nanotechnology"- NANO 2010 in K S Rangasamy College of Technology, Tiruchengode on Dec 13- 16, 2010.
  • International Conference on "3rd Bangalore NANO 2010" in IISc, Bangalaru on Dec 8- 9, 2010.
  • Paper presented- "Introduction to synthesis of nano materials by different techniques", National Conference on Current trends in Chemistry NCCTC-10, in Bharathiar University, Coimbatore on Dec 2- 3, 2010.
  • Paper Presented- "Corrosion Inhibition of Essential Oils on Copper in Sea Water, Rain Water, SO2 and H2S Environments", National Conference on Recent Advances in Electroanalytical Techniques in Gandhigram Rural Institute- Deemed University, Gandhigram on Feb 25- 26, 2010.
  • Paper Presented- "Studies on Essential Oils as VCI for Mild Steel in Marine Atmosphere", National Conference on Corrosion Assessment and Its Control- (NCAC 09) in Thiyagaraja College, Madurai on Dec 21- 22, 2009.
  • Paper Presented- "Introduction to Nanomaterials and Nanosciences, National Symposium and seminar – Solid state Chemistry and Nanomaterials in Vellore College of Technology", Vellore on Nov 19- 21, 2009.
  • National Seminar on Nanosciences and Nanomaterials, on June 4th 2009 Attended in Amrita College of Engineering and Technology, Coimbatore.
  • National Seminar on Recent Advances in Green Chemistry-RAGC’08 on Oct 14th 2008 Attended in Velammal College of Engineering and Technology, Madurai.
  • Three Days Workshop on Faculty Empowerment Programs-VIKASA on Jan 18- 20, 2008 Attended in Amrita School of Business, Coimbatore.
  • Paper Presented-"Bioinformatics in Drug Discovery" in National Seminar on "Emerging Trends and Developments in Bioinformatics" on 3- 5, Jan 2006 in Dr. G. R. Damodaran College of Science, Coimbatore.
  • National Seminar on "Emerging Trends in Chemistry" on June 2006 in Avinashilingham Deemed University, Coimbatore.
     
Faculty Research Interest: