scholarly journals Synthesis, Electrochemical, Thermodynamic, and Quantum Chemical Investigations of Amino Cadalene as a Corrosion Inhibitor for Stainless Steel Type 321 in Sulfuric Acid 1M

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Y. Koumya ◽  
R. Idouhli ◽  
A. Oukhrib ◽  
M. Khadiri ◽  
A. Abouelfida ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Corrosion Inhibitor ◽  
Quantum Chemical ◽  
Diffusion Processes ◽  
Inhibitory Effect ◽  
Steel Type ◽  
Anionic Species ◽  
Eis Measurements ◽  
Protonated Molecules

The corrosion of stainless steel is one of the major industries’ issues that gained wide interest among researchers. It became necessary to develop and apply eco-friendly approaches to corrosion control. This work explores the inhibitory effect of a newly synthesized amino cadalene (ACM) on the corrosion of stainless steel type 321 in sulfuric acid 1M. Particularly, the experimental study consisting of electrochemical and surface analyses was conducted in conjunction with a theoretical approach. The electrochemical results showed that ACM acted as a mixed-type corrosion inhibitor and the inhibition efficiency attained 91% at 10−3M. EIS measurements revealed that both metal charge transfer and diffusion processes are involved in the interfacial metal/solution reactions. The interfacial mechanism is thoroughly investigated; the physisorption of the protonated molecules was preceded by the formation of a negative layer due to adsorption of the solution anionic species. The experimental insights are corroborated with the quantum chemical calculations.

Electrochemical Investigation of Triadimenol as Corrosion Inhibitor for Copper in 0.5mol/L H2SO4 Solution

2013 ◽  
Vol 830 ◽  
pp. 81-85
Author(s):  
Song Song Li ◽  
Wei He ◽  
Zhi Hua Tao ◽  
Shou Xu Wang
Keyword(s):  
Sulfuric Acid ◽  
Corrosion Inhibitor ◽  
Electrochemical Impedance ◽  
Polarization Measurement ◽  
Electrochemical Investigation ◽  
Copper Corrosion ◽  
Inhibitor Concentration ◽  
Mechanism Of Inhibition ◽  
Eis Measurements ◽  
Cathodic And Anodic Processes

This paper chose triadimenol as a corrosion inhibitor of copper in 0.5mol/L sulfuric acid. The properties of corrosion inhibition were investigated by the polarization measurement and electrochemical impedance spectroscopy (EIS). Polarization curves showed that both cathodic and anodic processes of copper corrosion were suppressed. The inhibiting efficiency increased as the increment of the inhibitor concentration and reached 86.7% at 50 mg/L. The results obtained from EIS measurements are in line with that obtained from potentiodynamic polarization. Finally, a mechanism of inhibition is proposed and discussed.

3-Thiophenemalonic acid as corrosion inhibitor of copper

2017 ◽  
Vol 64 (1) ◽  
pp. 52-60 ◽  
Author(s):  
A.B. Medrano-Solís ◽  
U. León-Silva ◽  
Maria Elena Nicho
Keyword(s):  
Sulfuric Acid ◽  
Sodium Chloride ◽  
Corrosion Inhibitor ◽  
Diffusion Processes ◽  
Copper Surface ◽  
Corrosion Mechanism ◽  
Cooling Systems ◽  
Content Type ◽  
Mixed Control ◽  
And Diffusion

Purpose The purpose of this study was to examine the copper protection against corrosion using 3-thiophenemalonic acid (3TMA). Design/methodology/approach The heterocyclic organic molecule was tested experimentally as a corrosion inhibitor of copper in two different concentrations (0.01 M and 0.001 M) in 0.5 M solutions of sodium chloride and sulfuric acid by AC electrochemical and DC techniques. Findings Results showed that the organic compound was adsorbed chemically on the copper surface, and the inhibitions mechanism was both anodic and cathodic. The corrosion mechanism was under mixed control: charge transfer from metal to the environment through the double electrochemical layer, and diffusion processes. Practical implications This inhibitor could have application in water cooling systems. Originality/value The results of this paper showed that 3TMA could be used for reducing corrosion rates of copper in solutions of sodium chloride and sulfuric acid.

scholarly journals Inhibitory Effect of Ethanolic Extract of Propolis on Corrosion of Ferritic Stainless Steel in Chloride Media

2019 ◽  
Vol 33 (2) ◽  
pp. 213-219 ◽  
Author(s):  
Luiza Marilac Pereira Dolabella ◽  
Thalys Eduardo dos Santos ◽  
Tulio Matencio ◽  
Wander Luiz Vasconcelos ◽  
Vanessa Lins
Keyword(s):  
Stainless Steel ◽  
Polarization Resistance ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Ethanolic Extract ◽  
Inhibitory Effect ◽  
Aqueous Sodium Chloride Solution ◽  
Maximum Inhibition ◽  
Eis Measurements ◽  
Ethanolic Extract Of Propolis

This work evaluates the inhibitory effect of ethanolic extract of propolis (EEP) on the corrosion of AISI 409 stainless steel (SS) in chloride media. Additions of 100, 200, and 500 μL of EEP in an aqueous sodium chloride solution were performed. The inhibitory effect on the SS was evaluated using electrochemical impedance spectroscopy (EIS) measurements up to 720 hours in immersion. EEP additions of 200 μL and 500 μL increased the polarization resistance of the SS. After 720 hours of immersion, the highest impedance was identified for the SS in solution with 500 μL of EEP. The maximum inhibition efficiency observed for addition of 500 μL of EEP in solution was 98.1 %, after 360 h of immersion.

Experimental and Theoretical Approach on the Enhanced Inhibitory Effect of Tetracyclic Triterpenes for Stainless Steel Corrosion in Sulfuric Acid

2019 ◽  
Vol 50 (6) ◽  
pp. 3002-3012 ◽  
Author(s):  
Yassine Koumya ◽  
Rachid Idouhli ◽  
Ahlam Sayout ◽  
Abdesselam Abouelfida ◽  
Abdelaziz Benyaich ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Theoretical Approach ◽  
Steel Corrosion ◽  
Inhibitory Effect

Electrochemical and quantum chemical assessment of linoleic acid as a corrosion inhibitor for carbon steel in sulfuric acid solution

2019 ◽  
Vol 1197 ◽  
pp. 535-546
Author(s):  
I.A. Hermoso-Diaz ◽  
A.E. Foroozan ◽  
J.P. Flores-De los Rios ◽  
L.L. Landeros-Martinez ◽  
J. Porcayo-Calderon ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Linoleic Acid ◽  
Carbon Steel ◽  
Acid Solution ◽  
Corrosion Inhibitor ◽  
Sulfuric Acid Solution ◽  
Quantum Chemical ◽  
Chemical Assessment

Effect of sesquiterpenes on the general corrosion behaviour of stainless steel in sulfuric acid: electrochemical and quantum chemical calculations

2020 ◽  
Vol 75 (1) ◽  
pp. 39-56
Author(s):  
Yassine Koumya ◽  
Rachid Idouhli ◽  
Othmane Zakir ◽  
Mohy Eddine Khadiri ◽  
Mohamed Zaki ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Corrosion Behaviour ◽  
General Corrosion

scholarly journals Experimental and Theoretical Studies of α-Linolenic Acid as Green Corrosion Inhibitor for Carbon Steel in 0.5 M Sulfuric Acid

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6169
Author(s):  
I.A. Hermoso-Diaz ◽  
R. Lopez-Cecenes ◽  
J.P. Flores-De los Rios ◽  
L.L. Landeros-Martínez ◽  
E. Sarmiento-Bustos ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Linolenic Acid ◽  
Density Functional ◽  
Polarization Curves ◽  
Chemical Hardness ◽  
High Tendency ◽  
Green Corrosion Inhibitor ◽  
Eis Measurements

A component of Salvia hispanica, α-linolenic acid, has been evaluated as a green corrosion inhibitor for 1018 carbon steel in 0.5 M sulfuric acid using weight loss tests, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) measurements. Theoretical calculations using Density Functional Theory (DFT) were used also. The results have shown that this compound is a good corrosion inhibitor, with an efficiency which increased with an increase in its concentration up to 600 ppm, but it decreased with a further increase in the concentration. α-linolenic acid formed protective corrosion products layer because it was chemically adsorbed onto the steel surface according to a Langmuir type of adsorption isotherms. Polarization curves have shown that α-linolenic acid is a good, mixed type of inhibitor with a predominant effect on the cathodic hydrogen evolution reactions. EIS measurements indicated a charge transfer-controlled corrosion process. DFT calculations indicated that α-linolenic acid was more efficient in an acidic environment than in a neutral one because has a high tendency to donate electrons and can be easily protonated. In addition to this, it had the highest EHUMO value, the best chemical reactivity, the greatest tendency to transfer electrons and a greater facility of modifying its electronic configuration in the presence of carbon steel specimens according to its chemical hardness value.

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