Application of Myrmecodia Pendans Extract as a Green Corrosion Inhibitor for Mild Steel in 3.5% NaCl Solution

2014 ◽  
Vol 493 ◽  
pp. 684-690 ◽  
Author(s):  
Atria Pradityana ◽  
Sulistijono ◽  
Abdullah Shahab
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Potentiodynamic Polarization ◽  
Physical Adsorption ◽  
Steel Corrosion ◽  
Inhibition Mechanism ◽  
Chemical Adsorption ◽  
Inhibitor Concentration ◽  
Characteristics Analysis

The use of Myrmecodia Pendans (MP) extract as mild steel corrosion inhibitor in 3.5% NaCl media was investigated using weight loss and potentiodynamic polarization methods as well as characteristics analysis of the Fourier Transform Infra-Red (FTIR). Obtained data from weight loss and potentiodynamic polarization methods has shown the value of inhibition efficiency (% IE) is proportional toadded inhibitor concentration. Tafel constants data indicates that MP extract can act as cathodic and anodic inhibitors (type of mixed inhibitor). FTIR analysis also demonstrates the characteristics of MPextract. Occured inhibition mechanism was in the form of inhibitor adsorption process on metal surfacethat allegedly preceded by physical adsorption followed by chemical adsorption. Chemical adsorption is conceivable since metal surface scoping elevates as the increasing of inhibitor concentration.

scholarly journals Inhibition of Mild Steel Corrosion in 1N H2SO4Medium by Acid Extract ofNyctanthes arbortristisLeaves

2009 ◽  
Vol 6 (4) ◽  
pp. 1003-1008 ◽  
Author(s):  
R. Saratha ◽  
V. G. Vasudha
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Mixed Type ◽  
Steel Corrosion ◽  
Experimental Methods ◽  
Acid Extract ◽  
Inhibitor Concentration ◽  
Mild Steel Corrosion ◽  
Polarization Studies

Efficiency of acid extract of dryNyctanthes arbortristis(Night Jasmine, Coral Jasmine) leaves as corrosion inhibitor for mild steel in 1N H2SO4medium was investigated in the present study. Experimental methods include weight loss and polarization studies. The results indicateNyctanthes arbortristisleaves to be a good corrosion inhibitor of a mixed type and having efficiency as high as 90% at 1% inhibitor concentration.

scholarly journals New Aromatic Azo-Schiff as Carbon Steel Corrosion Inhibitor in 1 M H2SO4

2018 ◽  
Vol 34 (5) ◽  
pp. 2471-2476 ◽  
Author(s):  
Hamida Edan Salman ◽  
Asim A. Balakit ◽  
Ali Ahmed Abdulridha
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Steel Corrosion ◽  
Spectroscopic Techniques ◽  
Different Temperatures ◽  
Corrosion Inhibition Efficiency

A new aromatic Schiff base with azo linkage (AS) has been synthesized and characterized by FT-IR, 1H NMR and 13C NMR spectroscopic techniques. The new compound (AS) has been evaluated as carbon steel corrosion inhibitor at different concentrations (0.005, 0.01, 0.02, 0.04 and 0.08 mM) and different temperatures (303 – 333 K). The corrosion inhibition efficiency was studied by potentiodynamic polarization and weight loss measurements. The effects of concentration and temperature on the inhibition efficiency were studied by potentiodynamic polarization studies, the results showed that increasing concentration of AS increases the inhibition efficiency while increasing the temperature decreases it, the highest corrosion inhibition efficiency, 93.9% was recorded with 0.08 mM of AS at 313 K in 1 M H2SO4. Weight loss measurements showed that the inhibition efficiency reached 97.1% in the presence of AS (0.08 mM) at 313 K. The adsorption process was found to obey Langmuir isotherm, and the adsorption thermodynamic parameters were studied. Scanning electron microscope (SEM) was used to confirm the results.

scholarly journals Inhibition of Mild Steel Corrosion by 3-Benzoylmethyl Benzimidazolium Hexafluoroantimonate in Acidic Solution

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Ayssar Nahlé ◽  
Ideisan I. Abu-Abdoun ◽  
Ibrahim Abdel-Rahman
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Thermodynamic Parameters ◽  
Phenyl Ring ◽  
Acidic Solution ◽  
Steel Corrosion ◽  
Effect Of Temperature ◽  
Mild Steel Corrosion ◽  
Hcl Solution

The corrosion inhibition of mild steel in 1 M HCl solution by a synthesized compound (3-benzoylmethyl benzimidazolium hexafluoroantimonate) was investigated electrochemically and by weight loss experiments. The concentration of this inhibitor ranged from5 ×10-7 M to5×10-4 M. The effect of temperature (from 303 to 343 K) and concentrations (from5×10-7 M to5×10-4 M) were investigated. The percentage inhibition increased with the increase of the concentration of the inhibitor and reached about 98% at the concentration of5×10-4 M at 303 K. The percentage inhibition decreased with the increase of temperature. The thermodynamic parameters for the adsorption of this inhibitor on the metal surface were calculated. This compound was found to be a very good corrosion inhibitor due to the presence of nitrogen in benzimidazole and phenyl ring.

UAE Rhazya Stricta Decne extract as a corrosion inhibitor for mild steel in HCl solution

2014 ◽  
Vol 61 (4) ◽  
pp. 261-266 ◽  
Author(s):  
Ayssar Nahlé ◽  
Ibrahim Almaidoor ◽  
Ibrahim Abdel-Rahman
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Elevated Temperatures ◽  
Physical Adsorption ◽  
Inhibition Mechanism ◽  
Content Type ◽  
Highly Efficient ◽  
Rhazya Stricta ◽  
Increasing Temperature ◽  
Hcl Solution

Purpose – This study aims to study electrochemically and by weight-loss experiments the effect of UAE Rhazya Stricta Decne extract on the corrosion inhibition of mild steel in 1.0 M HCl solution, which will serve researchers in the field of corrosion. Design/methodology/approach – Weight loss measurements were carried out on mild steel specimens in 1.0 M HCl and in 1.0 M HCl containing various concentrations (ranging from 2.0 to 0.002 g/L.) of the UAE Rhazya Stricta Decne extract at temperatures ranging from 303 to 343 K. Findings – The aqueous Rhazya Stricta Decne leaves extract was found to be a highly efficient inhibitor for mild steel in 1.0 M HCl solution, reaching about 90 per cent at 2.0 g/L and 303 K, a concentration considered to be very moderate. Even with one-tenth of that concentration, 0.2 g/L, an inhibition of about 82 per cent was obtained at 303 K. The rate of corrosion of the mild steel in 1.0 M HCl is a function of the concentration of the Rhazya Stricta Decne extract. This rate increases as the concentration of the Rhazya Stricta Decne extract is increased. The percentage of inhibition in the presence of this inhibitor was decreased with temperature which indicates that physical adsorption was the predominant inhibition mechanism because the quantity of adsorbed inhibitor decreases with increasing temperature. Practical implications – This inhibitor could have application in industries, where HCl solutions at elevated temperatures are used to remove scale and salts from steel surfaces, such as acid cleaning of tankage and pipeline, and may render dismantling unnecessary. Originality/value – This paper is intended to be added to the family of green corrosion inhibitors which are highly efficient and can be used in the area of corrosion prevention and control.

scholarly journals Aspartic Acid as Corrosion Inhibitor of Mild Steel Corrosion Using Weight Loss, Acidimetry and EIS Measurement

2018 ◽  
Vol 15 (2) ◽  
pp. 6262-6274
Author(s):  
Sylvester Obaike Adejo ◽  
Stephen Gbaoron Yiase ◽  
Joseph Aondoaver Gbertyo ◽  
Emmanuel Onah Ojah
Keyword(s):  
Weight Loss ◽  
Adsorption Isotherm ◽  
Mild Steel ◽  
Aspartic Acid ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Isotherm Models ◽  
Chemical Adsorption ◽  
Free Energy Of Adsorption ◽  
Mild Steel Corrosion

Corrosion inhibition characteristics of aspartic acid on  mild steel corrosion in 0.5 M H2SO4 was investigated using weight loss, acidimetry, and electrochemical impedance spectroscopy (EIS). Analysis of the metal surface morphology, uninhibited and inhibited, was carried out through scanned electron microscope. The results showed that the inhibition efficiency increased with increase in inhibitors concentration and rise in temperature for all methods used. The highest v efficiency of  32.36 %, 66.26 % and 80.40 % were obtained for weight loss, acidimetry and EIS, respectively. The low value of efficiency for weight loss compared to other methods should signify the limitation for the method. The increase in efficiency with rise in temperature is a feature of chemical adsorption, which was confoirmed by the value of parameter b of the Adejo-Ekwenchi adsorption isotherm (AEI) model. Values of free energy of adsorption, ?Gads were all negative for all the methods, which means the adsorption processes were spontaneous. The heats of adsorption, Qads values were all positive, implying that the processes were endothermic. Values of activation energy were fairly constant, which is an evident to support the proposed chemical adsorption mechanism. The negative sign in the values of entropy of adsorption, ?Sads is an indication  that the activated complex in the rate-determining step was associative. The data obtained was tested with several isotherms, but found to best fit into the El-Awady, Freundlich and Tempkin adsorption isotherm models.

scholarly journals Mild steel corrosion inhibition by synthesized 7-(Ethylthiobenzimidazolyl) Theophylline

2021 ◽  
Author(s):  
N’guessan Yao Silvère Diki ◽  
Nagnonta Hippolyte Coulibaly ◽  
Kadjo François Kassi ◽  
Albert Trokourey
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Physical Adsorption ◽  
Reaction System ◽  
Steel Corrosion ◽  
Tafel Polarization ◽  
Mild Steel Corrosion ◽  
System Temperature

The corrosion inhibition of mild steel by 7-(ethylthiobenzimidazolyl) theophylline (7-ETBT) in 1 M HCl medium was investigated through weight loss and Tafel polarization techniques within a temperature range of 298 to 318 K. The inhibition efficiency depends on the concen­tration of 7-ETBT and reaction system temperature. The maximum inhibition efficiency values of 90.73 and 87.06 %, respectively, were estimated using both weight loss and Tafel polarization techniques at 298 K. The results suggest spontaneous and predominant physical adsorption of 7-ETBT on the metal surface which obeys Langmuir isotherm model. Furthermore, Tafel polarization method revealed that 7-ETBT is a mixed-type inhibitor. Po­tentiodynamic polarization results are in accordance with weight loss data to a good extent.

The influence of temperature on the inhibition of carbon steel corrosion in acidic lignin

2015 ◽  
Vol 62 (5) ◽  
pp. 301-306 ◽  
Author(s):  
Solhan Yahya ◽  
Norinsan Kamil Othman ◽  
Abdul Razak Daud ◽  
Azman Jalar ◽  
Roslina Ismail
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Acid Corrosion ◽  
Steel Corrosion ◽  
Inhibition Mechanism ◽  
Free Energy Of Adsorption ◽  
Lignin Concentration ◽  
Content Type ◽  
Influence Of Temperature

Purpose – This paper aims to investigate the influence of temperature and lignin concentration on the inhibition of carbon steel corrosion in 1 M HCl. Design/methodology/approach – Weight loss corrosion tests were performed at different temperatures in the range of 30-70°C (303-343 K). Findings – It was found that the corrosion inhibition efficiency (IE) of lignin on the carbon steel decreased when the temperature was increased from 60 to 70°C. However, at lower temperatures ranging from 30 to 50°C, the IE improved, due to occurrence of lignin adsorption on the surface of metal specimens. The IE was higher with increasing lignin concentration, thus reducing the weight loss of the carbon steel. The adsorption phenomenon involved exothermic processes because the value of enthalpy of adsorption (ΔH°ads) < 0 and Gibbs free energy of adsorption (ΔG°ads) were less negative with increase in temperature. The entropy of adsorption (ΔS°ads) had negative values, representing the decrease in disorder of adsorption. The adsorption of lignin on the carbon steel surface in 1 M HCl was comprehensive, as deduced from kinetic and thermodynamic parameters. However, physisorption was the major contributor in the inhibition mechanism. The inhibitive features of carbon steel surfaces showed less damage once the steel was treated in lignin, as evident from macroscopy images. Practical implications – The use of lignin as an acid corrosion inhibitor at high temperature is practical in metal surface treatment process. Social implications – The use of organic compounds gives an advantage to the environment, universal health and save cost, as the compounds can be found in nature. Originality/value – Lignin can act as a flexible corrosion inhibitor within the temperature range of 30-70°C in 1 M HCl because it exhibits comprehensive adsorption (i.e. a combination of both physisorption and chemisorption) at specific concentrations.

scholarly journals Effect of N-(6-aminobenzo[d]thiazol-2-yl)benzamide and 2,6-diamino-benzothiazole as Corrosion Inhibitor in acid medium

2016 ◽  
Vol 12 (12) ◽  
pp. 4593-4613
Author(s):  
Rekha. S ◽  
Kannan. K ◽  
Gnanavel. S
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Acid Medium ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Free Energy Of Adsorption ◽  
Weight Loss Method ◽  
Ft Ir ◽  
Loss Method

2-amino-6-nitrobenzothiazole(ANBT) was used as an inhibitor for the corrosion of mild steel in acid medium since the inhibition efficiency was low for that compound, 2,6-diaminobenzothiazole (DABT) and N-(6-aminobenzo [d] thiazol-2-y1) benzamide(ABTB) was synthesized,  and characterized by FT-IR, H1NMR, and C13NMR.The synthesized compound was tested as a corrosion inhibitor for mild steel in 1N HCl solution using weight loss, Potentiodynamic polarization, and AC impedance techniques. The inhibition efficiency was studied at the different time, temperature and acid concentration by weight loss method. The values of activation energy and free energy of adsorption of these compounds were also calculated, which reveals that the inhibitor was adsorbed on the mild steel by physisorption mechanism. Adsorption obeys Langmuir and Temkin adsorption isotherms. The results obtained by weight loss method revealed that the compound performed as a better inhibitor for mild steel in 1N HCl. Potentiodynamic polarization studies showed that the inhibitor acts as a mixed type inhibitor.AC impedance studies revealed that the corrosion process was controlled by charge transfer process. Surface analysis was studied using SEM and FT-IR.

scholarly journals Experimental and theoretical study on the corrosion inhibitor potential of quinazoline derivative for mild steel in hydrochloric acid solution

2020 ◽  
Author(s):  
Fidelis Ebunta Abeng ◽  
Valentine Anadebe ◽  
Patience Yake Nkom ◽  
Enyinda Goodluck Kamalu ◽  
Kelechi J. Uwakwe
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Metal Surfaces ◽  
Steel Surface ◽  
Physical Adsorption ◽  
Steel Corrosion ◽  
Quinazoline Derivative ◽  
Mild Steel Surface ◽  
Mild Steel Corrosion

Interaction of metal surfaces with organic molecules has a significant role in corrosion inhibition of metals and alloys. More clarification, from both experimental and computa­tional view is needed in describing the application of inhibitors for protection of metal surfaces. In this study, the surface adsorption and corrosion inhibition behavior of metol­azone, a quinazoline derivative, on mild steel in 0.02, 0.04, 0.06, and 0.08 M HCl solutions were investigated. Weight loss, potentiodynamic polarization and electrochemical impe­dance spectroscopy techniques were used. The optimum inhibition efficiencies of 75, 82 and 83 % were found by these three techniques at the optimum inhibitor concentration of 500 mg/L and 303 K. Scanning electron microscopy (SEM) was used to confirm adsorption of quinazoline derivative on the surface of the mild steel. Computational simulations were additionally used to give insights into the interaction between quinazoline inhibitor and mild steel surface. Thermodynamic parameters of mild steel corrosion showed that quinazoline derivative functions as an effective anti-corrosive agent that slows down corrosion process. Potentiodynamic polarization results revealed a mixed-type inhibitor, while the result of the adsorption study suggests that adsorption of the inhibitor on the mild steel surface obeys the physical adsorption mechanism and follows Langmuir adsorption isotherm model.  

scholarly journals Paraformaldehyde as a corrosion inhibitor for carbon steel in (%15) HCl

2021 ◽  
Vol 11 (2) ◽  
pp. 1-14
Author(s):  
Ghassan Burhan Yaqoob
Keyword(s):  
Weight Loss ◽  
Corrosion Inhibitor ◽  
Steel Surface ◽  
Adsorption Process ◽  
Steel Corrosion ◽  
Inhibitor Concentration ◽  
Langmuir Adsorption ◽  
Mechanism Of Inhibition ◽  
Weight Loss Method ◽  
Loss Method

The effect of paraformaldehyde in the solution of 15% HCL as an inhibitor of C-steel corrosion has been studied using the weight loss method. It was found that the efficiency of inhibitor increased by increasing the inhibitor concentration and decreasing temperatures. Also, the action of paraformaldehyde as a corrosion inhibitor has been attributed to the insoluble complexes was adsorbed on the C-steel surface. The iron complexes were identified by FTIR spectrum and the mechanism of inhibition was explained as Langmuir adsorption. The thermodynamic parameters of the adsorption process were calculated and explained.

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