F-KCW-Department Publications
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Item CORROSION BEHAVIOR OF MILD STEEL IN HYDROCHLORIC ACID SOLUTION IN PRESENCE OF NICOTINIC ACID DERIVATIVES(International Journal of Current Research, 2014-01) Hemapriya V; Savithri K; Parameswari K; Chitra SThe inhibition effect of the synthesized organic inhibitor namely its benzylidine derivative investigated using weight loss, measurements. The inhibition efficiencies obtained from all methods employed are in good agreement with each other. The obtained results show that the compounds NAH and NABH are very good inhibitor solution. The inhibition efficiency increases with increase of inhibitor concentration. Changes in impedance parameters (R surface, leading to the formation of a protective film. Tafel polarization measurements showed that the inhibitors are mixed type. Adsorption of the inhibitor on the surface of the mild steel in 1M hydrochloric acid was found to obey Langmuir’s adsorpti energy of adsorption process were calculated and discussedItem ISOXAZOLINE DERIVATIVES AS CORROSION INHIBITORS FOR MILD STEEL IN ACID MEDIA(International Academy of Science, Engineering and Technology (IASET), 2014) Anusuya N; Sounthari P; Saranya J; Kiruthika A; Parameswari K; Chitra SInhibition of corrosion of mild steel in 1M H2SO4 by isoxazolines was studied using gravimetric, electrochemical techniques and scanning electron microscopy. The addition of all the isoxazolines to the corrosive medium reduced the corrosion rate. The effect of temperature on the corrosion behavior of mild steel was studied in the temperature range 303K - 333K for 1M H2SO4 with optimum concentration of the synthesized isoxazolines. Thermodynamic parameters were also calculated to know the mechanism of corrosion inhibition. Polarization studies showed that all the isoxazolines function as mixed inhibitors but predominantly act as anodic inhibitors. The percentage of iron in the corrodent solution was determined by atomic absorption spectroscopy. The protection of mild steel specimens by isoxazolines was further well supported by scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDX) analysis.Item DRY AND WET LAB ANALYSIS ON BENZOFUSED HETEROCYCLIC COMPOUNDS AS EFFECTIVE CORROSION INHIBITORS FOR MILD STEEL IN ACIDIC MEDIUM(Elsevier, 2016-08-25) Hemapriya V; Prabakaran M; Parameswari K; Chitra S; Kim, Seung-Hyun; Chung, Ill-MinThe influence of two benzofused heterocyclic compounds, namely 2-phenylquinazolin-4(3H)-one(PQO) and 2-phenyl-4H-benzo[d]oxazin-4-one(POO) in controlling mild steel corrosion in 1 M H2SO4 solution was investigated using gravimetric and electrochemical methods. The experimental results revealed that both the inhibitors inhibit corrosion and their inhibition efficiency follows the order PQO > POO. A mixed mode of inhibition from polarization and a charge transfer mechanism from impedance study in the absence and presence of inhibitors were found. The passive film formed on the mild steel surface was characterized using SEM-EDX. Quantum chemical parameters derived using DFT performed at B3LYP/6-31G(d, p) level were used to correlate the molecular structure.Item ISOXAZOLINE DERIVATIVES AS CORROSION INHIBITORS FOR MILD STEEL IN ACID MEDIA(International Academy of Sciences, Engineering and Technology, 2014-07) Anusuya N; Sounthari P; Saranya J; Kiruthika A; Parameswari K; Chitra SInhibition of corrosion of mild steel in 1M H2SO4by isoxazolines was studied using gravimetric, electrochemical techniques and scanning electron microscopy. The addition of all the isoxazolines to the corrosive medium reduced the corrosion rate. The effect of temperature on the corrosion behavior of mild steel was studied in thetemperature range303K - 333K for 1M H2SO4with optimum concentration of the synthesized isoxazolines. Thermodynamic parameters were also calculated to know the mechanism of corrosion inhibition. Polarization studies showed that all the isoxazolines function as mixed inhibitors but predominantly act as anodic inhibitors. The percentage of iron in the corrodent solution was determined by atomic absorption spectroscopy. The protection of mild steel specimens by isoxazolines was further well supported by scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDX) analysis.Item INHIBITION OF ACIDIC CORROSION OF LOW CARBON STEEL BY SYMMETRICAL 1,3,4-OXADIAZOLES(International Academy of Science, Engineering and Technology, 2013-07) Sounthari P; Kiruthika A; Chitra S; Parameswari KThe inhibitive effect of symmetrical 1,3,4-oxadiazoles on the corrosion of mild steel in 1M H2SO4 was investigated by weight loss method, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy. The results showed that inhibition efficiency increases with increase in concentration of the inhibitors. The potentiodynamic polarization curves revealed that the oxadiazoles act as mixed type inhibitors. EIS measurements show an increase in charge transfer resistance with the inhibitor concentrations. The temperature effect on the corrosion behaviour of the steel in 1M H2SO4 with and without the inhibitor was studied in the temperature range (303-333K). The thermodynamic parameter ∆G0 and kinetic parameter Ea have also been calculated. The inhibition efficiency has been synergistically enhanced by the addition of halide ions. The percentage of iron in the corrodent solution was determined by atomic absorption spectroscopy. The surface morphology of the mild steel specimens were evaluated using SEM images.Item ADSORPTION AND INHIBITIVE PROPERTIES OF TRIAZOLO- PYRIMIDINE DERIVATIVES IN ACID CORROSION OF MILD STEEL(Hindawi Publishing Corporation, 2011) Parameswari K; Chitra S; Kavitha S; Rajpriya J; Selvaraj AInhibitive and adsorption properties of synthesized triazolo- pryimidine derivatives (P1, P2 & P3 ) for the corrosion of mild steel was investigated using weight loss and electrochemical methods. Inhibition efficiency increased as the concentration of the inhibitor increased but decreased with increase in temperature. The triazolopyrimidines were found to act as adsorption inhibitors for the corrosion of mild steel. The adsorption mechanism of the triazolopyrimidine was found to be physisorption, spontaneous and exothermic. Also the adsorption followed Langmuir adsorption isotherm. polarisation studies showed that the inhibitors behave as cathodic type.Item PYRIMIDINE AMINES AS INHIBITORS FOR THE ACID CORROSION OF MILD STEEL(Global Journals, 2010-10) Parameswari K; Chitra S; Rajpriya J; Kavitha S; Selvaraj AThree Pyrimidine amines (PA1, PA2 & PA3) have been synthesized and investigated for corrosion inhibition activity towards mild steel in 1M H2SO4. Weight loss, potentiodynamicpolarisation and electrochemical impedance spectral techniques have been used. Thermodynamic parameters [∆G°ads, ∆H° and ∆S°]have been evaluated. The compounds act through physisorption mechanism on the mild steel surface and obeyed Langmuir adsorption isotherm. Polarisation studies showed that the compounds behave as cathodic type.