F-KCW-Department Publications

Permanent URI for this communityhttps://dspace.psgrkcw.com/handle/123456789/1

Browse

Subject: search.filters.subject.mild steel

Search Results

Now showing 1 - 10 of 13
  • Thumbnail Image
    Item
    INHIBITION OF CORROSION OF MILD STEEL BY AN ALCOHOLIC EXTRACT OF A SEAWEED SARGASSUM MUTICUM
    (Engineering Society for Corrosion, 2021) Victor David Arockiaraj, Mallika Jeslina; Suyambulingam, Jone Kirubavathy; Abdulhameed, Al-Hashem; Susai Santhammal, Rajendran; Joany, RM; Caslav, Lacnjevac
    An alcoholic extract of a sea weed Sargassum muticum has been used to control corrosion of mild steel in 0.5 N HCl. Weight loss method and Electrochemical studies have been used in this study. Weight loss study reveals that 500 ppm of the inhibitor offers 99.25 % inhibition efficiency. Polarization study reveals that the inhibitor functions as an anodic inhibitor at higher concentration. The AC impedance spectra confirm the formation of a protective film on the metal surface. Adsorption of inhibitor molecules on the metal surface follows Langmuir adsorption isotherm
  • No Thumbnail Available
    Item
    THE INHIBITION EFFECT OF THIAZINE COMPOUNDS TOWARDS THE CORROSION OF MILD STEEL IN SULPHURIC ACID MEDIA
    (Rasayan Journal of Chemistry, 2012-12) Hemapriya V; Parameswari K; Bharathy G
    The inhibition effect of thiazines (AT, CBT & NBT) on mild steel corrosion in 1M sulphuric acid (H2SO4) was investigated by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The result showed that corrosion rate was significantly decreased in presence of the inhibitors. The inhibiting action increases with the concentration of thiazine compounds to attain 99 % at 0.5mM of (AT). The increase in temperature leads to a decrease in the inhibition efficiency of the compounds in the temperature range 308-353K. Adsorption of thiazines on the mild steel surface in 1M H2SO4 obeyed the Langmuir adsorption isotherm. EIS measurements showed an increase in charge transfer resistance (Rct) with concentration. Potentiodynamic polarization study showed that the inhibitors act as mixed type, controlling both the anodic and cathodic reactions. Surface analysis by SEM confirmed the formation of adsorbed protective layer of the inhibitor on the steel surface.
  • No Thumbnail Available
    Item
    CORROSION INHIBITION EFFECT OF HYDROXY PYRAZOLINE DERIVATIVES ON MILD STEEL IN SULPHURIC ACID SOLUTION TOGETHER WITH QUANTUM CHEMICAL STUDIES
    (University of Mohammed Premier, 2015-03-13) Anusuya N; Sounthari P; Saranya J; Parameswari K; Chitra S
    Inhibition potential of synthesized pyrazoline derivatives on the corrosion inhibition of mild steel in 1M H2SO4 solution have been evaluated and studied by gravimetric, Tafel polarization, electrochemical impedance spectroscopy techniques and the quantum chemical studies using density functional theory (DFT). The results showed that the inhibition efficiency of the investigated compounds depend on the concentration and nature of the inhibitor. The effect of temperature on the corrosion behavior of mild steel in 1M H2SO4 without and with the inhibitors was studied in the temperature range 303 to 333 K. Some activated thermodynamic parameters were computed and discussed. Polarization studies showed that all the pyrazolines function as mixed inhibitor, but predominantly act as cathodic type. The surface morphology of inhibited mild steel was analyzed by scanning electron microscope technology with energy dispersive X-ray spectroscopy (SEM-EDX). FT-IR spectroscopic analysis was used to obtain information on bonding mechanism between the metallic surface and the inhibitors. Quantum chemical parameters such as highest occupied molecular orbital energy (EHOMO), lowest unoccupied molecular orbital energy (ELUMO), energy gap (∆E) and dipole moment (µ), the softness (σ), the fraction of the electrons transferred from the inhibitor to the metal surface (∆N) and the total energy (TE) have been calculated. It was found that theoretical data support the experimental results
  • No Thumbnail Available
    Item
    A COMBINED EXPERIMENTAL AND THEORETICAL INVESTIGATION ON PYRAZOLONE DERIVATIVE AS CORROSION INHIBITOR FOR MILD STEEL IN 0.5 M SULPHURIC ACID MEDIA
    (Sociedade Portuguesa de Electroquímicals, PortugaliaeElectrochimicaActa, 2014-04-23) Nalini D; Kohilah K S; Ramkumar, Sowmya
    The inhibition action of the Pyrazolone Derivative (PYR) on the corrosion of mild steel in 0.5 M sulphuric acid was investigated by weight loss, polarization, impedance and SEM. Results obtained revealed that PYR performed excellently as corrosion inhibitor with efficiency of 91% at 11 ppm at 298 K. Its adsorption on mild steel obeys Langmuir and Temkin isotherm. Polarization curves indicate that PYR behaves as mixed type. The value of ΔG°ads indicates the spontaneous physisorption of PYR. The SEM results confirm the presence of a protective surface layer over the mild steel surface. The reactivity of the compound was analysed through theoretical calculation.
  • No Thumbnail Available
    Item
    SYNTHESIS, CHARACTERIZATION AND CORROSION PROTECTIVE EFFICIENCY OF SOME 1, 3, 4-THIADIAZOLINES ON MILD STEEL IN ACID MEDIA
    (Oriental Scientific Publishing Company, Oriental Journal of Chemistry, 2010-11-09) Shamitha Begum A; Nalini D; Manjula Devi T
    The Inhibition effect of corrosion of mild steel using Thiadiazolines in H2SO4 medium by weight loss, electrochemical methods was investigated. The corrosion inhibition was studied in H2SO4 by weight loss method for about 3hrs at room temperature and it was found that the corrosion inhibition behaviour of Thiadiazolines is greater in sulphuric acid. Results were fitted into suitable adsorption isotherm. The Electrochemical parameters for mild steel in H2SO4 solution with and without inhibitor were calculated. The data revealed that Electrochemical polarization shows the Mixed Mode of inhibition and the results of Electrochemical impedance spectroscopy have shown that the change in the impedance parameters, charge transfer resistance and double layer capacitance with the change in concentration of the inhibitor is due to the adsorption of the molecules leading to the formation of a protective layer on the surface of mild steel. The Effect of Temperature on the corrosion rate, activation energy and free energy of adsorption were also calculated
  • No Thumbnail Available
    Item
    PREPARATION AND CHARACTERIZATION OF ALKALINE ELECTROLESS Ni-B NANO DEPOSITION ON MILD STEEEL IN THE PRESENCE OF AZADIRACHTA INDICA GUM
    (Rasayan Journal of Chemistry, 2018) S, Dheenadhayalan; V, Nijarubini; J, Mallika
    The current research work deals with the alkaline electroless Ni-B plating of mild steel in the presence ofAzadirachta indica gum (GAI). The deposited Ni-B film on mild steel surface wasanalyzed using FT-IR and Scanning Electron MicroscopeSEM) techniques. The amorphous nature of Ni-B deposits on mild steelwas confirmed by XRD. The amount of Nickel and Boron content on depositedNi-B film on mild steel surface was investigated by Energy Dispersive X-ray Analysis (EDX).
  • No Thumbnail Available
    Item
    RECENT REVIEWS ON QUINOLINE DERIVATIVES AS CORROSION INHIBITORS
    (De Gruyter, 2018-02-21) Lavanya K; Saranya J; Chitra S
    Traditionally, controlling corrosion has been managed by various methods like cathodic protection, process control, reduction of the metal impurity content and application of surface treatment techniques as well as incorporation of suitable alloys. However, the use of corrosion inhibitors has proven to be the easiest and cheapest method for corrosion protection and prevention in acidic media. These inhibitors slow down the corrosion rate and thus prevent economic losses due to metallic corrosion on industrial vessels, equipment or surfaces. Many researchers have recently focused on corrosion prevention methods using organic inhibitors for mild steel in acidic solutions to mimic industrial processes. This paper arranges for an overview of types of corrosion, corrosion process and mainly recent work done on the application of quinolone derivatives as corrosion inhibitors for different metals
  • No Thumbnail Available
    Item
    ADSORPTION AND DENSITY FUNCTIONAL THEORY ON CORROSION OF MILD STEEL BY A QUINOXALINE DERIVATIVE
    (Scholars Research Library, 2015) J, Saranya; P, Sounthari; K, Parameswari; S, Chitra
    (3E)-3-{[4-(phenylsulfonyl)]imino}-3,4-dihydroquinoxalin-2(1H)-one (PSDQO) has been synthesized and its inhibiting action on the corrosion of mild steel in 1 M H2SO4 has been assessed by weight loss method at 303 K – 333 K. The results of the investigation show that this compound has excellent inhibiting properties for mild steel corrosion in sulphuric acid. Inhibition efficiency increases with increase in the concentration of the inhibitor. The adsorption of the inhibitor was tested for Langmuir, Temkin, Flory-Huggin’s and El-Awady isotherm and proved physical adsorption. Quantum chemical calculations were employed to give further insight into the mechanism of inhibitive action of the inhibitor.
  • No Thumbnail Available
    Item
    QUANTUM CHEMICAL STUDY ON THE CORROSION INHIBITION PROPERTY OF SOME HETEROCYCLIC AZOLE DERIVATIVES
    (Oriental Scientific Publishing Company, 2015-08-20) Anusuya N; Sounthari P; Saranya J; Parameswari K; Chitra S
    Quantum chemical calculations based on density functional theory (DFT) method were performed on heterocyclic azole derivatives as corrosion inhibitors for mild steel in acid media to investigate the relationship between molecular structure of the inhibitors and the corresponding inhibition efficiencies (%). Quantum chemical parameters most relevant to their potential action as corrosion inhibitors have been calculated in the non-protonated and protonated forms in aqueous phase for comparison. Results obtained in this study indicate thatin acidic media, both the protonated and non-protonated forms of the azoles represent the better actual experimental situation.
  • No Thumbnail Available
    Item
    POLYESTER-TOBACCO COMPOSITE: A NOVEL ANTICORROSION MATERIAL FOR MILD STEEL IN ACID MEDIUM
    (American Scientific Publishers, 2014-12-01) Sounthari P; Kavitha T; Kiruthika A; Saranya J; Chitra S; Parameswari K; Yuvaraj H
    A novel anticorrosion material polyester/tobacco (PES-TOB) composite was prepared via. ultra sonication method. The composite was characterized by FT-IR, TGA and XRD. In this report, we present the comparative corrosion inhibition performance on mild steel in 1 M H2SO4 containing PES and PES-TOB composite. The PES was prepared by condensation of 2,5-bis(4′-aminophenyl-N,N′-(3′-hydroxyphenylazo)-1,3,4-oxadiazole and pimelic acid. The synthesized PES showed only inhibition efficiency up to 38% at 500 ppm. But the corrosion protection performance of the PES-TOB composite was excellent upto 96%, which was monitored by weight loss method, potentiodynamic polarization method, electrochemical impedance spectroscopy and AAS. The surface morphology was examined by scanning electron microscopy.