Triazepines Compounds as Novel Synthesized Corrosion Inhibitors

2020 ◽  
pp. 156-186
Author(s):  
Khaoula Alaoui ◽  
Ashraf Abousalem ◽  
Burak Tüzün ◽  
Younes El Kacimi
Keyword(s):  
Mild Steel ◽  
Steel Surface ◽  
Chemical Mechanism ◽  
Inhibition Mechanism ◽  
Corrosion Monitoring ◽  
Mild Steel Surface ◽  
Kinetic And Thermodynamic Parameters ◽  
Good Works ◽  
Theoretical Investigations ◽  
Metallic Corrosion

This chapter describes some recent good works in the field of metallic corrosion monitoring using Triazepine carboxylate inhibitors in hydrochloric acidic media. The different sections of this chapter cover electrochemical measurements and theoretical investigations. This review reveals Triazepine carboxylate compounds as very good inhibitors for mild steel in hydrochloric medium. The inhibition action of all Triazepine carboxylates compound studied was performed via adsorption on mild steel surface. Comparison between several adsorption isotherms reveal that the adsorption was spontaneous and followed Langmuir isotherm in HCl for all inhibitors and all studied temperatures. Kinetic and thermodynamic parameters for all inhibitors led to suggest the occurrence of chemical mechanism and also the spontaneity of the adsorption process on mild steel surface. The corrosion inhibition mechanism was also compared and discussed with the light of some Triazepine carboxyale compounds constituents.

Effect of Polar Extract of Cocoa Peels Inhibitor on Mechanical Properties and Microstructure of Mild Steel Exposed in Hydrocloric Acid

2015 ◽  
Vol 776 ◽  
pp. 193-200 ◽  
Author(s):  
Gunawarman ◽  
Yuli Yetri ◽  
Emriadi ◽  
Novesar Jamarun ◽  
Ken-Cho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mild Steel ◽  
Theobroma Cacao ◽  
Steel Surface ◽  
Sample Surface ◽  
Total Carbon ◽  
Inhibition Mechanism ◽  
Green Inhibitor ◽  
Mild Steel Surface ◽  
Weight Loss Method

Effect of addition of theobroma cacao peels extract (TCPE), a new proposed green inhibitor, on tensile and hardness properties, and related microstructure of mild steel exposed in solution of 1.5M HCl was investigated in order to know the contribution of this kind of inhibitor in controlling mechanical properties, in addition to reducing corrosion attack. Corrosion behaviors including inhibition mechanism and adsorption process during exposure were then discussed. Corrosion rate and inhibitory efficiency of mild steel samples containing 0.3%C were determined using weight loss method. The samples were exposed in the acid solution with and without addition of 0.5-2.5% the TCPE. Tensile and hardness tests were subsequently performed on the samples to determine the change of mechanical properties of the metal prior and after addition of the extracts. Sample surface morphologies and chemical composition as well were observed by a scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDX). The results show that the strength, hardness and elongation of mild steel drop significantly due to heavy damage in the surface after immersion in the HCl solution for 32 days. However, these mechanical properties gradually increase with increasing concentration of the extract following the increase of surface coverage and inhibition efficiency. The increase of the tensile properties and hardness is due mainly to the ability of the inhibitor to cover mild steel surface through formation of metal-organo complexes protection layer in the surface of the mild steel. Although total carbon level in the surface of the mild steel also increases significantly, there is no any proof of carbon difussion into the mild steel. The addition of polar extract of theobroma cacao peels into a solution of 1.5 M HCl is, therefore, not only effective to minimize the degradation on the mild steel surface, but it also diminishes the mechanical properties reduction of the mild steel.

Corrosion Inhibition of Mild Steel by Electrodeposited Poly(M-Aminophenol) Coating

2021 ◽  
Vol 317 ◽  
pp. 498-505
Author(s):  
Sabrina M. Yahaya ◽  
Mohamad Kamal Harun ◽  
Ismaliza Ismail ◽  
Rosmamuhamadani Ramli
Keyword(s):  
Mild Steel ◽  
Steel Surface ◽  
Electrochemical Impedance ◽  
Impedance Measurement ◽  
Barrier Properties ◽  
Electrical Circuit ◽  
Significant Drop ◽  
Mild Steel Surface ◽  
Barrier Resistance ◽  
And Performance

In this study, poly(m-aminophenol) (PMAP) coating was electrochemically synthesized by cyclic voltammetry (CV) on mild steel surface to investigate the effects of its barrier protection within the scope of its electrochemical impedance towards further oxidation of the mild steel substrates. The developed PMAP coating were characterized by Fourier Transform Infrared (FTIR) spectroscopy and Field Emission Scanning Electron Microscopy (FESEM). The barrier resistance ability of PMAP coating towards corrosion of mild steel was determined in 0.5 M aqueous sodium chloride solution (NaCl) at various immersion times by the electrochemical impedance spectroscopy (EIS). The barrier properties were interpreted through impedance measurement using Nyquist and Bode plots. Equivalent electrical circuit models derived from the plots were employed to describe the coating barrier behaviour and performance. Data obtained showed that, the oxidation peak of PMAP coating were observed at potential +1.0 V (Ag/AgCl). The micrograph of FESEM indicates the formation of a dense and continous PMAP coatings. In FTIR analyses, the presence of peak around 1082 cm-1 ascribed to C–O–C etheric linkage which supported the formation of electro polymerized PMAP coating on mild steel surface. EIS measurement revealed that, PMAP coatings experienced a significant drop in total impedance values with time followed by the development of an electrochemical reactions on coating/metal interface, which indicates the gradual degradation of the barrier resistance ability of the PMAP coatings.

Electrochemical behaviour of acetyl G as corrosion inhibitor for mild steel in acid medium

2015 ◽  
Vol 44 (6) ◽  
pp. 371-378 ◽  
Author(s):  
Y. Sangeetha ◽  
S. Meenakshi ◽  
C. Sairam Sundaram
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Acid Medium ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Electrochemical Behaviour ◽  
Green Inhibitor ◽  
Content Type ◽  
Mild Steel Surface

Purpose – The purpose of this paper is to develop an eco-friendly corrosion inhibitor for mild steel in 1 M HCl. Design/methodology/approach – A pharmaceutical drug acetyl G was investigated for its corrosion inhibition efficiency using weight loss method, potentiodynamic polarisation and electrochemical impedance spectroscopy. Findings – The inhibition efficiency increased with increase in inhibitor concentration. Results from polarisation studies revealed mixed type of inhibition. Impedance studies, scanning electron microscopy and Fourier transform spectroscopy confirm the adsorption of inhibitor on the mild steel surface. Research limitations/implications – The drug acetyl G has sulphur and nitrogen atoms which effectively block the corrosion of mild steel and is non-toxic and has good inhibition efficiency. Practical implications – This method provides an excellent, non-toxic and cost-effective material as a corrosion inhibitor for mild steel in acid medium. Originality/value – Application of this drug as a corrosion inhibitor has not been reported yet in the literature. Replacing the organic inhibitors, this green inhibitor shows excellent inhibition efficiency. This is adsorbed excellently on the mild steel surface due to the presence of long chain and hetero atoms. Thus, the drug retards the corrosion reaction.

scholarly journals Electrochemical Impedance Spectroscopy Evaluation of Organic Coating on Mild Steel

2018 ◽  
Vol 7 (3.11) ◽  
pp. 30
Author(s):  
Zailelah Zainoldin ◽  
Hadariah Bahron ◽  
Mohamad Kamal Harun ◽  
Syaidah Athirah Dzolin
Keyword(s):  
Mild Steel ◽  
Steel Surface ◽  
Electrochemical Impedance ◽  
Organic Coating ◽  
Electrical Equivalent Circuit ◽  
Mild Steel Surface ◽  
Electro Oxidation ◽  
Nyquist Plots ◽  
Eis Measurements ◽  
Voltammetric Technique

Electro-oxidation of 4-hydroxybenzalaniline in alkaline solution on mild steel surface was successfully carried out using cyclic voltammetric technique. Results demonstrated that brownish colour appeared on the mild steel surface after the cycle of voltammetric study. The presence of film was confirmed by the EIS measurement whereas the Nyquist plots obtained from EIS measurements were fitted with suitable electrical equivalent circuit. The coated mild steel exhibit better polarization resistance than uncoated mild steel.  

scholarly journals Studies of Inhibition effect “E & Z’’ Configurations of hydrazine Derivatives on Mild Steel Surface in phosphoiric acid

2019 ◽  
Vol 8 (6) ◽  
pp. 6336-6353 ◽  
Author(s):  
M.E. Belghiti ◽  
M. Mihit ◽  
A. Mahsoune ◽  
A. Elmelouky ◽  
R. Mghaiouini ◽  
...  
Keyword(s):  
Mild Steel ◽  
Steel Surface ◽  
Mild Steel Surface ◽  
Inhibition Effect ◽  
Hydrazine Derivatives
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