scholarly journals Investigation ofCitrus aurantiifoliaLeaves Extract as Corrosion Inhibitor for Mild Steel in 1 M HCL

2009 ◽  
Vol 6 (3) ◽  
pp. 785-795 ◽  
Author(s):  
R. Saratha ◽  
S. V. Priya ◽  
P. Thilagavathy
Keyword(s):  
Mild Steel ◽  
Plant Extract ◽  
Mixed Type ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Stable Complex ◽  
Electrochemical Studies ◽  
Inhibitive Action ◽  
Citrus Aurantiifolia ◽  
Mixed Type Inhibitor

The inhibition efficiency of acid extract of leaves ofCitrus aurantiifolia[CAL] plant on the corrosion of mild steel in 1 M HCl was investigated by weight loss measurements and electrochemical studies. The corrosion rate of mild steel and the inhibition efficiencies of the extract were calculated. The results obtained show that the extract could serve as an effective inhibitor for the corrosion of mild steel in HCl media. Inhibition was found to increase with increasing concentration of the plant extract. The inhibitive action of plant extract is discussed on the basis of adsorption of stable complex at the mild steel surface. Theoretical fitting of different isotherms, Langmuir, Temkin, Freundlich, Frumkin, Flory-Huggins and the kinetic thermodynamic model, were tested to clarify the nature of adsorption. Polarisation curves revealed that this inhibitor act as a mixed type inhibitor and the inhibition efficiency of up to 97.91% can be obtained. The surface analysis study confirms the corrosion of mild steel and its inhibition by the inhibitor CAL.

Inhibition Effect of N-Octyl-2-Pyrrolidonium Chloride on the Corrosion of Mild Steel in Acidic Medium

2013 ◽  
Vol 634-638 ◽  
pp. 651-654
Author(s):  
Zi Chong Zhuang ◽  
Bao Hua Huang ◽  
Jun Liu ◽  
Yu Jing Lu ◽  
Zhan Chang Pan ◽  
...  
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Acidic Medium ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Electrochemical Techniques ◽  
Inhibition Mechanism ◽  
Inhibition Effect ◽  
Hcl Solution ◽  
Mixed Type Inhibitor

A new ionic liquid, N-octyl-2-pyrrolidonium chloride (NOPC), were synthesized and evaluated as inhibitors for mild steel (Q235) corrosion in 1 mol/L HCl. The adsorption behavior and corrosion inhibition mechanism of NOPC for mild steel in HCl solution were investigated by using weight loss measurements, electrochemical techniques, and SEM. The inhibition efficiency increases with the increasing concentration of NOPC in 1 mol/L HCl and decreases as the temperature increases. The results indicate that NOPC is able to function as a mixed type inhibitor.

scholarly journals Electrochemical and quantum chemical parameters of (-)-(S)-9-flu¬oro-2,3-dihydro-3-methyl-10-(4-methyl-1-pipera-zinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acidas anti-corrosive agent for API 5L X-52 steel

2020 ◽  
Vol 10 (3) ◽  
pp. 234-244
Author(s):  
Fidelis Ebunta Abeng ◽  
Magdalene Edet Ikpi ◽  
Victor E. Okpashi ◽  
Onumashi A. Ushie ◽  
Mbang E. Obeten
Keyword(s):  
Quantum Chemical ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Quantum Chemical Study ◽  
Chemical Study ◽  
Chemical Parameters ◽  
Polarization Method ◽  
Quantum Chemical Parameters ◽  
Inhibitive Action ◽  
Mixed Type Inhibitor

The inhibitive action of (-)-(S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid (Levaquin) on API 5L X-52 steel in 2 M HCl solution was investigated using potentiodynamic polarization method and quantum chemical study. Levaquin drug showed good inhibition efficiency of 88 and 95 % at 303 and 323 K, respectively. The results of experimental measurements revealed that Levaquin drug works as a mixed type inhibitor. Langmuir thermodynamic model was tested to describe the mode of inhibitor adsorption on the steel surface. The quantum chemical calculations confirmed the efficacy of Levaquin drug as a corrosion inhibitor.

scholarly journals ELECTROCHEMICAL STUDIES FOR CORROSION INHIBITION OF MILD STEEL BY CHRYSOPHYLLUM ALBIDUM EXTRACT

2018 ◽  
Vol 6 (1) ◽  
pp. 415-420
Author(s):  
Akoma Chigozie ◽  
Osarolube Eziaku ◽  
Abumere O. E.
Keyword(s):  
Corrosion Rate ◽  
Mild Steel ◽  
Current Density ◽  
Potentiodynamic Polarization ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Electrochemical Studies ◽  
Polarization Technique ◽  
Carbonated Drinks

The corrosion behavior of mild steel in carbonated drinks produced by Nigerian Breweries (Fanta, Sprite and Coke) was studied in the presence and absence of an eco-friendly inhibitor, Chrysophyllum albidum using Potentiodynamic polarization technique at 25 °C. Results showed that Chrysophyllum albidum reduced the current density (icorr), which in turn means that the corrosion rate was reduced significantly. The inhibition efficiency was found to be 93%, 78.6% and 87.5% for Fanta, Sprite and Coke respectively. The study also showed that Chrysophyllum albidum functioned as a mixed-type corrosion inhibitor in the three environments studied and therefore presents it as a long-term inhibitor for the corrosion of mild steel.

scholarly journals An Ecofriendly Initiative for the Corrosion Inhibition of Mild Steel in 1 M HCl Using Tecoma capensis Flower Extract

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
A. Prithiba ◽  
R. Rajalakshmi
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Immersion Time ◽  
Inhibition Efficiency ◽  
Adsorption Process ◽  
Electrochemical Impedance ◽  
Analytical Techniques ◽  
Electrochemical Studies ◽  
Flower Extract ◽  
Mixed Type Inhibitor

Corrosion inhibition of mild steel in 1 M HCl in the presence of Tecoma capensis flower extract was carried out by means of mass loss, potentiodynamic polarisation, and electrochemical impedance techniques. The inhibition efficiency varied with concentration of the inhibitor, immersion time, and temperature. The adsorption of the inhibitor on mild steel surface obeys Langmuir’s adsorption isotherm. Thermodynamic parameters reveal that the adsorption process is spontaneous. Electrochemical studies reflect that the inhibitor acts as a mixed-type inhibitor. Surface analytical techniques ascertain the inhibitive nature of the studied inhibitor.

scholarly journals Lepidagathis alopecuroides methanol extract as corrosion inhibitor for mild steel in HCl

2021 ◽  
Vol 32 (1) ◽  
pp. 22-27
Author(s):  
Gloria I. Ndukwe ◽  
Habibat F. Chahul ◽  
Godwin Oodo
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Plant Extract ◽  
Linear Polarization ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Methanol Extract ◽  
Activation Parameters ◽  
Aerial Parts

Abstract We report on the preliminary phytochemical screening of the methanolic extract of the aerial parts of Lepidagathis alopecuroides and its evaluation as a potential corrosion inhibitor for mild steel in aerated 1.0 M HCl by weight loss and linear polarization measurements. Weight loss measurements were conducted at 303, 313, 323 and 333 K. The results showed that L. alopecuroides inhibited the corrosion of mild steel in the acid solution with inhibition efficiency increasing with increase in the concentrations of the plant extract but decreased with increase in temperature. Linear polarization plots showed the plant extract to inhibit both the dissolution of the steel at the anode and the hydrogen evolution reaction (HER) at the cathode making it a mixed inhibitor. Temkin adsorption isotherms best modeled the adsorption of L. alopecuroides extract on the steel surface. From the values of the evaluated kinetic activation parameters in the study, the mechanism of physisorption is proposed for the adsorption of the plant extract on the steel surface.

The Action Mechanisms of BIMGCS12-3 as Corrosion Inhibitor of Mild Steel for Vitriolic Acid Pickling

2011 ◽  
Vol 337 ◽  
pp. 785-788
Author(s):  
Yong Ming Sun
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Mixed Type ◽  
Steel Surface ◽  
Ammonium Bromide ◽  
Morphological Examination ◽  
Acid Pickling ◽  
Action Mechanisms ◽  
Mixed Type Inhibitor

Propanediyl-α, ω-bis-(N-dodecyl benzimidazole ammonium bromide), (abbreviated as BIMGCS12-3), was tested as inhibitor for the corrosion of mild steel in 1M H2SO4. It was found by weight loss technique that prepared inhibitor adsorbed on mild steel surface forming a protecting film. Polarization curves show that BIMGCS12-3 acts as mixed type inhibitor. Moreover, surface morphological examination has been carried out by SEM.

scholarly journals Corrosion Resistance of Mild Steel in Hydrochloric Acid Solutions by Clinopodium acinos as a Green Inhibitor

2020 ◽  
Vol 11 (2) ◽  
pp. 9786-9803
Keyword(s):  
Mild Steel ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Acid Solutions ◽  
Green Inhibitor ◽  
Electrochemical Tests ◽  
Hydrochloric Acid Solutions ◽  
Surface Examination ◽  
Mixed Type Inhibitor

Study of corrosion inhibition for mild steel in 1M HCl by Clinopodium acinos (CA) extract was evaluated by altered methods. These methods are WL, electrochemical tests (Electrochemical frequency modulation (EFM), potentiodynamic polarization (PP), and electrochemical impedance spectroscopy (EIS)) and surface examination performances (AFM, ATR- FTIR and XPS). The CA extract concentrations are (50, 100, 150, 200, 250,300 ppm) at altered temperatures 25, 30, 35, 40, 45 0C.WL curves showed raising the inhibition efficiency of M-S by increasing CA concentration and lowering the temperature. PP curves explained that CA extract act as a mixed type inhibitor. The green inhibitor was utilized because of its lower price and not affect the environment.

Corrosion resistance of mild steel in sulphuric acid solution by Coreopsis tinctoria extract: electrochemical and surface studies

2018 ◽  
Vol 65 (4) ◽  
pp. 408-416 ◽  
Author(s):  
Kathirvel Kalaiselvi ◽  
Ill-Min Chung ◽  
Seung-Hyun Kim ◽  
Mayakrishnan Prabakaran
Keyword(s):  
Mild Steel ◽  
Plant Extract ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Sulphuric Acid Solution ◽  
Content Type ◽  
Mild Steel Surface ◽  
Coreopsis Tinctoria ◽  
Maximum Inhibition ◽  
Raman Spectral

Purpose The purpose of this paper is to investigate the inhibitive performance of Coreopsis tinctoria (C. tinctoria) plant extract for the corrosion of mild steel in 0.5 M H2SO4. Design/methodology/approach The inhibition efficiency was studied by weight loss, electrochemical measurements and the surface analysis was done by Raman, scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM-EDS) and atomic absorption spectroscopy (AAS) analysis. Findings Maximum inhibition efficiency of C. tinctoria in 0.5 M H2SO4 on mild steel is 80.62 per cent (500 ppm) at 303 ± 1K. The adsorption of the C. tinctoria on the mild steel surface in 0.5 M H2SO4 was found to obey Langmuir adsorption isotherm. Temperature studies were carried out and the significant parameters, such as change in enthalpy (ΔH°), change in entropy (ΔS°) and change in free energy (ΔG°ads) and heat of adsorption (Qads), were calculated. The productive layer formed on the mild steel surface in 0.5 M H2SO4 were confirmed by the Raman spectral analysis. Originality/value This paper provides information on the inhibitive properties of C. tinctoria plant extract which is found to be a good corrosion inhibitor for mild steel in 0.5 M H2SO4.

scholarly journals A Study of Mild Steel Corrosion UsingAdhatoda Vasica(AV) Extract as Inhibitor in Different Acid Medium

2010 ◽  
Vol 7 (4) ◽  
pp. 1284-1289 ◽  
Author(s):  
P. Matheswaran ◽  
A. K. Ramasamy
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Acid Medium ◽  
Acidic Medium ◽  
Active Sites ◽  
Mixed Type ◽  
Steel Corrosion ◽  
Adhatoda Vasica ◽  
Mild Steel Corrosion ◽  
Inhibitive Action

Corrosion behavior of mild steel in acidic medium usingAdhatoda Vasica(AV) extract was investigated. The inhibitive effective ofAdhatoda Vasicaon the corrosion of mild steel in different acidic medium has been studied by weight loss and polarization methods. The Ecorrvalues are shifted slightly towards negative side in presence of inhibitors which indicate the inhibitors inhibit the corrosion of mild steel in acids solution by controlling both anodic and cathodic reactions due to the blocking of active sites on the metal surface. It is evident that inhibitors bring about considerable polarization of the cathode as well as anode. It was, therefore, inferred that the inhibitive action is of mixed type.

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