scholarly journals A Comparative Study of the Inhibitory Effect of Gum Exudates from Khaya senegalensis and Albizia ferruginea on the Corrosion of Mild Steel in Hydrochloric Acid Medium

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Paul Ocheje Ameh
Keyword(s):  
Comparative Study ◽  
Mild Steel ◽  
Inhibition Efficiency ◽  
Chemical Constituents ◽  
Inhibitory Effect ◽  
Adsorption Model ◽  
Hydrochloric Acid Medium ◽  
Maximum Inhibition ◽  
Active Chemical ◽  
Khaya Senegalensis

A comparative study of the inhibitory potentials of gum exudates from Albizia ferruginea (AF) and Khaya senegalensis (KS) on the corrosion of mild steel in HCl medium was investigated using weight loss and gasometric method. The active chemical constituents of the gum were elucidated using GC-MS while FTIR was used to identify the bonds/functional groups in the gums. The two gum exudates were found to be good corrosion inhibitors for mild steel in acidic medium. On comparison, maximum inhibition efficiency was found in Khaya senegalensis with 82.56% inhibition efficiency at 0.5% g/L concentration of the gum. This may be due to the fact that more compounds with heteroatoms were identified in the GCMS spectrum of KS gum compared to the AF gum. The presence of such compounds may have enhanced their adsorption on the metal surface and thereby blocking the surface and protecting the metal from corrosion. The adsorption of the inhibitors was found to be exothermic and spontaneous and fitted the Langmuir adsorption model.

scholarly journals Effect of Terminalia catappa Leaves Extract on Corrosion of Mild Steel using Response Surface Methodology

2020 ◽  
Vol 27 (2) ◽  
pp. 47-56
Author(s):  
A.O. Okewale ◽  
O.A. Adesina ◽  
B.H. Akpeji
Keyword(s):  
Response Surface Methodology ◽  
Mild Steel ◽  
Response Surface ◽  
Inhibition Efficiency ◽  
Desirability Function ◽  
Inhibitory Effect ◽  
Quadratic Model ◽  
Box Behnken Design ◽  
Terminalia Catappa ◽  
Maximum Inhibition

Effect of Terminalia catappa leaves (TCL) extract in inhibiting corrosion of mild steel was investigated. In order to obtain the maximum inhibition efficiency, optimization of the process variables affecting corrosion of mild steel was carried out using the Box – Behnken Design plan and desirability function of Response Surface Methodology (RSM). The three parameters - varied include; TCL concentration (inhibitor), immersion time, and temperature and there effects in corrosion inhibition were established. The optimum conditions predicted from the quadratic model were inhibitor’s concentratrion (0.39 g/l), exposure time (8.68 hours), and temperature (36.06 oC) with the inhibition efficiency of 91.95 %. The data fitted well to the quadratic model which was validated. Adsorption of the extract’s component on the mild steel was responsible for the inhibitory effect of the TCL extract.The results showed that 97.92% of the total variation in the inhibition efficiency of TCL can be connected to the variables studied. Keywords: Mild steel, acid, Terminalia catappa, Corrosion, Response surface methodology (RSM).

scholarly journals A Comparative Study of the Inhibitory Effect of the Extracts ofOcimum sanctum,Aegle marmelos, andSolanum trilobatumon the Corrosion of Mild Steel in Hydrochloric Acid Medium

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
M. Shyamala ◽  
P. K. Kasthuri
Keyword(s):  
Comparative Study ◽  
Mild Steel ◽  
Plant Extracts ◽  
Inhibition Efficiency ◽  
Hydrogen Permeation ◽  
Inhibitory Effect ◽  
Impedance Method ◽  
Ocimum Sanctum ◽  
Aegle Marmelos ◽  
Solanum Trilobatum

A comparative study of the inhibitory effect of plant extracts,Ocimum sanctum, Aegle marmelos, andSolanum trilobatum, on the corrosion of mild steel in 1N HCl medium was investigated using weightloss method, electrochemical methods, and hydrogen permeation method. Polarization method indicates plant extracts behave as mixed-type inhibitor. The impedance method reveals that charge-transfer process mainly controls the corrosion of mild steel. On comparison, maximum inhibition efficiency was found inOcimum sanctumwith 99.6% inhibition efficiency at 6.0% v/v concentration of the extract. The plant extracts obey Langmuir adsorption isotherm. The SEM morphology of the adsorbed protective film on the mild steel surface has confirmed the high performance of inhibitive effect of the plant extracts. From hydrogen permeation method, all the plant extracts were able to reduce the permeation current. The reason for the reduced permeation currents in presence of the inhibitors may be attributed to the slow discharge step followed by fast electrolytic desorption step. Results obtained in all three methods were very much in good agreement in the orderOcimum sanctum>Aegle marmelos>Solanum trilobatum.

scholarly journals Effect of Schiff's Bases as Corrosion Inhibitors on Mild Steel in Sulphuric Acid

2007 ◽  
Vol 4 (3) ◽  
pp. 408-414 ◽  
Author(s):  
R. K. Upadhyay ◽  
S. P. Mathur
Keyword(s):  
Mild Steel ◽  
Sulphuric Acid ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Inhibitory Effect ◽  
Acid Solutions ◽  
Schiff’S Bases ◽  
Schiff's Bases ◽  
Maximum Inhibition ◽  
Good Agreement

Mass loss and thermometric methods have been used to study the corrosion inhibitory effect of synthesised Schiff's basesviz.N-(furfurilidine) – 4- methoxy aniline (SB1),N-(furfurilidine) – 4- methylaniline (SB2),N-(salicylidine) – 4- methoxy aniline (SB3),N-(cinnamalidine) – 4 –methoxy aniline (SB4) andN-(cinnamalidine) - 2-methylaniline (SB5) on mild steel in sulphuric acid solutions. Results show that both methods have good agreement with each other and inhibition efficiency depends upon the concentration of inhibitor as well as that of acid. Maximum inhibition efficiency is shown at highest concentration of Schiff's bases at the highest strength of acid.

scholarly journals Inhibitory Action ofBorassus FlabelliferLinn. (Palmyra Palm) Shell Extract on Corrosion of Mild Steel in Acidic Media

2010 ◽  
Vol 7 (3) ◽  
pp. 1055-1065 ◽  
Author(s):  
P. R. Vijayalakshmi ◽  
R. Rajalakshmi ◽  
S. Subhashini
Keyword(s):  
Mild Steel ◽  
Inhibition Efficiency ◽  
Measurement Techniques ◽  
Electrochemical Measurement ◽  
Inhibitory Effect ◽  
Industrial Processes ◽  
Acidic Media ◽  
Extract Concentration ◽  
Palm Shell ◽  
Maximum Inhibition

The inhibitory effect of extract obtained from destructive distillation of palmyra palm (Borassus flabelliferLinn.) shell on the corrosion of mild steel in 0.5 M H2SO4and 1 M HCl was investigated using weight loss and electrochemical measurement techniques. The results show that the inhibition efficiency increases with increase of palmyra palm shell extract concentration. The maximum inhibition efficiency in 0.5 M H2SO4and 1 M HCl was found to be 97.65% and 98.11% for a period of 24 h with 3%v/v concentration of the inhibitor respectively. Thermodynamic parameters were evaluated from temperature studies. Results were fitted into suitable adsorption isotherms. Electrochemical measurements infer that the extract acted through mixed mode of inhibition. Efforts were made to analyze the effectiveness of shell extract of palmyra palm in industrial processes.

scholarly journals Comparative Study of the Inhibitor Efficiency of Maize Husk Polar Extract in H2SO4 and HCL Acid Environment for Corrosion Control of Mild Steel

2020 ◽  
Author(s):  
Solomon Ochuko ◽  
Anaidhuno Peter ◽  
Abraham Erebugha
Keyword(s):  
Experimental Data ◽  
Comparative Study ◽  
Mild Steel ◽  
Corrosion Product ◽  
Inhibition Efficiency ◽  
Isotherm Model ◽  
Gravimetric Analysis ◽  
Corrosion Control ◽  
Inhibitor Efficiency ◽  
Maximum Inhibition

This research work investigated the comparative study of the inhibitor efficiency of Maize Husk Polar Extract (MHPE) green inhibitor to monitor and control corrosion on mild steel in 1.5M of HCl and 1.5M of H2SO4, using gravimetric analysis, Fourier Transform Infrared Spectroscopy (FTIR). The extract was found to efficiently inhibit the corrosion process in 1.5M of HCl and 1.5M of H2SO4 as the inhibitor efficiency increased with increase in the concentration MHPE. The maximum inhibition efficiency of MHPE was 93.6% in 1.5m of HCl at 384 hours. However, in 1.5M of H2SO4, the maximum inhibition efficiency was 96% at 48 hours in 5ml/litre further increase in inhibitor concentration drastically reduced the efficiency to 28.3% at 25ml/litre for 48hrs. Phytochemical analysis revealed the presence of alkaloid flavonoids, phenolics, phytates, saponins, terpenoids anthocyanins, steroids and tannins. The FTIR of MHPE and the corrosion product shows the variation of the peak numbers and the nature of shift indicates the interaction among the functional groups of extract in the corrosion inhibition process. It also confirmed the presence of C-O functional group as the most dominant in the entire corrosion product. The isotherm parameters were evaluated using Langmuir isotherm model, Temkin isotherm model, Frumkin isotherm model and Flory-Huggins isotherm model and it was observed that Langmuir model gave the best fit with the experimental data because the values of the degree of correlation was found to be about unity which shows a very good fit for the experimental data. Also the adsorption process was physiosorption due to the fact that all the values of (G are less than -40KJ/mol. The study clearly shows that by the efficiency of MHPE, gotten from the two media, MHPE is suitable for corrosion control in oil pipelines during pigging, acidizing of reservoirs, hydraulic fracturing and hydro-testing.

scholarly journals Inhibition Effect of Miconazole Nitrate on the Corrosion of Mild Steel in Hydrochloric Acid Medium

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
J. Ishwara Bhat ◽  
Vijaya D. P. Alva
Keyword(s):  
Hydrochloric Acid ◽  
Mild Steel ◽  
Acid Medium ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Inhibitor Molecule ◽  
Langmuir Adsorption ◽  
Hydrochloric Acid Medium ◽  
Miconazole Nitrate ◽  
Impedance Spectroscopy Technique

The corrosion inhibition of mild steel by miconazole nitrate, an antifungal drug has been investigated using potentiodynamic polarization, electrochemical impedance spectroscopy technique, and weight loss methods. The experimental results suggested miconazole nitrate is a good corrosion inhibitor for mild steel in 1 M hydrochloric acid medium. The inhibition efficiency increased with increase in inhibitor concentration. The thermodynamic parameters were determined and discussed. The inhibition was assumed to occur via adsorption of the inhibitor molecule on the surface of mild steel following Langmuir adsorption isotherm.

scholarly journals Performance of Methyl-5-Benzoyl-2-Benzimidazole Carbamate (Mebendazole) as Corrosion Inhibitor for Mild Steel in Dilute Sulphuric Acid

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
F. O. Edoziuno ◽  
A. A. Adediran ◽  
B. U. Odoni ◽  
M. Oki ◽  
P. P. Ikubanni ◽  
...  
Keyword(s):  
Mild Steel ◽  
Inhibition Efficiency ◽  
Elevated Temperatures ◽  
Physical Adsorption ◽  
Electrochemical Techniques ◽  
Low Carbon Steel ◽  
Gravimetric Analysis ◽  
Low Carbon ◽  
Maximum Inhibition ◽  
Inhibitive Action

The inhibitive effect of mebendazole (MBZ) on the corrosion of low-carbon steel in H2SO4 was investigated by gravimetric and electrochemical techniques as well as examination of specimens in the scanning electron microscope with attached energy dispersive X-ray spectrometer (EDS). From gravimetric analysis, the highest inhibition efficiency of about 96.6% was obtained for 1.0 g of inhibitor in H2SO4 solution at 24 h, while with longer exposure times of between 72 to 120 h, the efficiencies averaged between 92 and 95%. Tafel extrapolations from the polarization curves showed that 1.0 g MBZ gave a maximum inhibition efficiency of approximately 99% for the investigation conducted at 30°C, whereas 1.5 g of MBZ gave a maximum inhibition efficiency of about 85% at 60°C. Inhibition efficiency increased with increasing concentrations of MBZ and decreased at elevated temperatures. The inhibitive action was attributed to physical adsorption of MBZ species on the mild steel surface which followed the Langmuir adsorption isotherm. MBZ performed as a mixed-type inhibitor on mild steel in dilute H2SO4.

CORROSION INHIBITORY EFFECT OF FEW PIPERIDIN-4-ONE OXIMES ON MILD STEEL IN HYDROCHLORIC ACID MEDIUM

2009 ◽  
Vol 16 (01) ◽  
pp. 141-147 ◽  
Author(s):  
A. N. SENTHILKUMAR ◽  
K. THARINI ◽  
M. G. SETHURAMAN
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Electrochemical Impedance ◽  
Inhibitory Effect ◽  
Charge Transfer Resistance ◽  
Polarization Measurement ◽  
Transfer Resistance ◽  
Hydrochloric Acid Medium ◽  
Oxime Derivatives ◽  
Weight Loss Study

Three piperidin-4-one oxime derivatives viz. 3,5-dimethyl-2,6-diphenyl-piperidin-4-one oxime (DDPO), 3-ethyl-2,6-diphenyl-piperidin-4-one oxime (EDPO), and 1-methyl-3-isopropyl-2, 6-diphenyl-piperidin-4-one oxime (MIDPO) were synthesized. Corrosion inhibiting ability of these compounds in 1 M HCl was studied using weight loss study, potentiodynamic polarization measurements, electrochemical impedance spectroscopy, XRD and SEM with EDS measurements. Weight loss studies revealed that all the three oximes are good corrosion inhibitors. The order of inhibiting ability of these compounds is as follows: DDPO > EDPO > MINDO. Results of the polarization measurement showed that these inhibitors do not alter the mechanism of either hydrogen evolution or mild steel dissolution reaction, proving the mixed mode of inhibition. At constant acid concentration, increase of inhibitor concentration increased the charge transfer resistance (R ct ), complimented with decrease of double layer capacitance (C dl ), thereby indicating the increase of percentage inhibition efficiency. XRD and SEM with EDS analysis provided strong proof for the existence of inhibitor film over the mild steel surface.

scholarly journals Mitigation of Mild Steel Corrosion in Acidic Solution Using Inhibitor

2011 ◽  
Vol 8 (s1) ◽  
pp. S53-S60 ◽  
Author(s):  
M. Vishnudevan
Keyword(s):  
Mild Steel ◽  
Sodium Benzoate ◽  
Inhibition Efficiency ◽  
Acidic Solution ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Trisodium Citrate ◽  
Tafel Polarization ◽  
Mild Steel Corrosion ◽  
Maximum Inhibition

The inhibition efficiency of mild steel corrosion in HCl acidic solution containing various concentrations of mixed inhibitors were evaluated by conducting Tafel polarization and electrochemical impedance studies. The mixed inhibitors used in this present investigation were trisodium citrate and sodium benzoate. In this present investigation 0.01 N to 0.1 N concentrations of HCl was used at 30°C. Sodium benzoate present in the mixed inhibitive system enhanced the inhibition efficiency through chemisorptions. The maximum inhibition efficiency ( 95.4%) was obtained for the mixed inhibitive system containing 0.05 M citrate and 0.5 M benzoate in 0.1 N HCl.

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