Chitosan as a green inhibitor for mild steel corrosion: Thermodynamic and electrochemical evaluations

2018 ◽  
Vol 70 (4) ◽  
pp. 738-748 ◽  
Author(s):  
Taher Rabizadeh ◽  
Shahin Khameneh Asl
Keyword(s):  
Mild Steel ◽  
Steel Corrosion ◽  
Green Inhibitor ◽  
Mild Steel Corrosion

scholarly journals Staminate Flower of Cocos Nucifera as Green Inhibitor for Mild Steel in HCl Medium

2012 ◽  
Vol 9 (3) ◽  
pp. 1632-1644 ◽  
Author(s):  
R. Rajalakshmi ◽  
A. S. Safina
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Cocos Nucifera ◽  
Staminate Flower ◽  
Steel Corrosion ◽  
Green Inhibitor ◽  
Flower Extract ◽  
Mild Steel Corrosion ◽  
Hcl Medium ◽  
Mixed Type Inhibitor

Corrosion control methods, especially the use of inhibitors, have gained monumental importance in the present scenario of expunging corrosion and the quest for eco-friendly reasons continues. To arrive at an inexpensive non-toxic, eco-friendly inhibitor formulations the present study on the use of Staminate Flower extract of Cocos Nucifera has been carried out by the classical weight loss measurements and electrochemical polarization measurements. The acid extract could bring out a maximum of 97.3% inhibition of mild steel corrosion in 1M HCl. Thermodynamic parameters of the corrosion process were calculated from temperature study. The adsorptive behaviour of Staminate Flower extract in acid solution may be approximated both by Langmuir and Temkin type isotherms. The results obtained by Tafel, Linear polarization resistance, and impedance spectroscopy have been correlated with the classical weight loss measurements. Values of Tafel constant ba and bc confirmed that the Staminate Flower extract acts like mixed type inhibitor. Examination of the surface of the metal in the presence of the inhibitor confirmed the deposition of inhibitor on the metal surface. The Staminate Flower extract in HCl medium efficiently inhibits the corrosion and proved to be zero cost inhibitor, eco-friendly, non-toxic, and highly economical.

Task-specific ionic liquid as a new green inhibitor of mild steel corrosion

2014 ◽  
Vol 289 ◽  
pp. 478-486 ◽  
Author(s):  
E. Kowsari ◽  
M. Payami ◽  
R. Amini ◽  
B. Ramezanzadeh ◽  
M. Javanbakht
Keyword(s):  
Ionic Liquid ◽  
Mild Steel ◽  
Steel Corrosion ◽  
Green Inhibitor ◽  
Mild Steel Corrosion ◽  
Task Specific Ionic Liquid

Studying effect of plantain extract behavior as an eco-friendly corrosion inhibitor on the mild steel in 1 M HCl solution

2018 ◽  
Vol 65 (3) ◽  
pp. 310-316 ◽  
Author(s):  
Moosa Es’haghi ◽  
Amirhossein Amjad ◽  
Sorayya Asghari ◽  
Ali Lotfi
Keyword(s):  
Mild Steel ◽  
Electrochemical Impedance ◽  
Physical Adsorption ◽  
Steel Corrosion ◽  
Sample Surface ◽  
Green Inhibitor ◽  
Content Type ◽  
Inhibition Effect ◽  
Mild Steel Corrosion ◽  
Hcl Solution

Purpose Corrosion inhibitors most commonly are used in the acid pickling, cleaning and etching solutions. Plant extracts as rich and cheap resources are among the eco-friendly inhibitors. This study aims to investigate the inhibition effect of plantain extract on mild steel corrosion. Design/methodology/approach The inhibition influence of plantain extract on mild steel corrosion was investigated through Tafel polarization, electrochemical impedance spectroscopy and weight loss techniques in 1 M HCl solution. Furthermore, the sample surface morphology was verified by scanning electron microscopy. Findings The inhibition effect of the plantain extract was increased with the increase in the inhibitor concentration due to its adsorption on the surface of samples. The adsorption mechanism of the plantain extract on mild steel is physical adsorption and follows Langmuir isotherm. Originality/value The results obtained from different methods showed that the plantain extract has good inhibition performance on corrosion mild steel in 1 M HCl solution as a green inhibitor.

scholarly journals Parkia biglobosa (African Locust Bean) Pulp as a Green Inhibitor for Mild Steel Corrosion

2019 ◽  
pp. 1-11
Author(s):  
O. M. Myina ◽  
E. G. Obed ◽  
E. O. Babatunde
Keyword(s):  
Mild Steel ◽  
Alkaline Medium ◽  
Inhibition Efficiency ◽  
Standard Free Energy ◽  
Steel Corrosion ◽  
Alkaline Media ◽  
Parkia Biglobosa ◽  
Green Inhibitor ◽  
Optimum Dosage ◽  
Mild Steel Corrosion

This work investigated corrosion inhibition potential of Parkia biglobosa (P. biglobosa) pulp on mild steel in 1.0 M HCl and 0.1M NaOH aqueous solutions at 301 and 321 K, aimed at converting a cellulosic renewable waste into an environmentally friendly answer to the challenge of mild steel corrosion, especially in chemical industries. Weight loss of mild steel coupons over a period of 120 hrs. were measured at varying concentrations (0.0-7.5 g/L) of P. biglobosa pulp. The data did not strictly fit the Langmuir isotherm, having a slope greater than unity and suggesting that adsorbing species from P. biglobosa pulp occupied more than one active site. This was collaborated by the quantum chemical parameters evaluated. Results of the investigations showed that P. biglobosa pulp is a good green inhibitor for mild steel corrosion in both acidic and alkaline media. An optimum dosage of 4.5 g/L resulted to 85.73 % inhibition efficiency () at 301 K while at 321 K, the optimum dosage was 1.0 g/L of the pulp with an inhibition efficiency ≈ 50 % and 55 % in the acidic and alkaline medium respectively. The  values decreased with increase in temperature and were strongly collaborated by values (- 0.86 Lcm-2h-1 at 301 K and - 0.498/0.55 Lcm-2h-1 at 321 K) of order (b) of the reaction. The corrosion reaction showed a large rate constant ( and  in acidic and alkaline medium respectively) at ambient temperature; reflecting the fast nature of the process. Values of the standard free energy of adsorption () were negative for the process both at ambient and elevated temperature indicative of a spontaneous process and stable layer of adsorption. These values were less than – 40 kJmol-1, suggestive of a physisorption mechanism. This was collaborated by higher adsorption activation energy () in presence of the inhibitor than in its absence.

Indole Alkaloids of Alstonia angustifolia var. latifolia as Green Inhibitor for Mild Steel Corrosion in 1 M HCl Media

2012 ◽  
Vol 22 (4) ◽  
pp. 1072-1078 ◽  
Author(s):  
Pandian Bothi Raja ◽  
Ahmad Kaleem Qureshi ◽  
Afidah Abdul Rahim ◽  
Khalijah Awang ◽  
Mat Ropi Mukhtar ◽  
...  
Keyword(s):  
Mild Steel ◽  
Indole Alkaloids ◽  
Steel Corrosion ◽  
Green Inhibitor ◽  
Mild Steel Corrosion

scholarly journals Inhibition of Mild Steel Corrosion in Acidic Medium by Telfairia occidentalis Rind Extract

2018 ◽  
pp. 1-10
Author(s):  
Inemesit A. Akpan ◽  
Okon U. Abakedi ◽  
Mfon A. James
Keyword(s):  
Mild Steel ◽  
Steel Surface ◽  
Physical Adsorption ◽  
Steel Corrosion ◽  
Sulphuric Acid Solution ◽  
Green Inhibitor ◽  
Mild Steel Surface ◽  
Langmuir Adsorption ◽  
Telfairia Occidentalis ◽  
Mild Steel Corrosion

Telfairia occidentalis rind extract has been studied as a potential green inhibitor for mild steel corrosion in 1 M H2SO4 using weight loss and hydrogen evolution methods. The results of the investigation reveal that Telfairia occidentalis rind extract is a good inhibitor of mild steel corrosion in sulphuric acid solution. The inhibition efficiency increases with increase in rind extract concentration but decreases with increase in temperature. The calculated thermodynamic parameters reveal that the corrosion inhibition process was endothermic and spontaneous. Physical adsorption has been proposed for the adsorption of Telfairia occidentalis rind extract onto mild steel surface. The adsorption of the extract on mild steel surface obeys the Langmuir adsorption isotherm. 

scholarly journals Trachyspermum Leaves Extract as a Green Inhibitor for Corrosion Inhibition of Mild Steel in 0.1m HCl: Experimental and Computational Study

2021 ◽  
Author(s):  
Niloofar Jafari ◽  
Sayed Ali Ahmadi ◽  
Razieh Razavi
Keyword(s):  
Corrosion Rate ◽  
Mild Steel ◽  
Computational Study ◽  
Steel Corrosion ◽  
Green Inhibitor ◽  
Inhibitory Mechanisms ◽  
Mild Steel Corrosion ◽  
Galvanostatic Polarization ◽  
Computational Data

Abstract The present study aims at investigating the impacts of the extract of Trachyspermum leaves on the mild steel corrosion in 0.1M hydrochloric acid (HCl), while highlighting its inhibitory mechanisms. The effects of mild steel corrosion in solutions of HCl were examined using the gravimetric and galvanostatic polarization techniques, along with EIS analyses. According to the results, the maximum inhibitory effectiveness corresponding to the minimum corrosion rate could be observed at the highest desirable level of inhibitor concentration equal to 100 ppm, while the corrosion rate decreases with an increase in the extract concentration. The absorption examinations indicated the best description of the metal surface interaction by Langmuir isotherm, while obtaining the best exposure time for the Trachyspermum leaves extract adsorption into the surface of the metal in different concentration. Based on the results of polarization, the inhibitors can play the role of a mixed inhibitor, also confirmed by the computational data.

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