Corrosion inhibition of mild steel by an imidazolium ionic liquid compound: the effect of pH and surface pre-corrosion

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95160-95170 ◽  
Author(s):  
Dongrui Yang ◽  
Mingzhen Zhang ◽  
Jie Zheng ◽  
Homero Castaneda
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Nacl Solution ◽  
Imidazolium Ionic Liquid ◽  
Effect Of Ph ◽  
Inhibition Performance

The corrosion inhibition performance of 1-decyl-3-methylimidazolium chloride (DMICL) on mild steel was investigated in a carbon dioxide-saturated NaCl solution at pH 3.8 and 6.8.

scholarly journals Studies on the Antibacterial Influence of Two Ionic Liquids and their Corrosion Inhibition Performance

2020 ◽  
Vol 10 (4) ◽  
pp. 1444 ◽  
Author(s):  
Mohamed F. Shehata ◽  
Ashraf M. El-Shamy ◽  
Khaled M. Zohdy ◽  
El-Sayed M. Sherif ◽  
Sherif Zein El Abedin
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Synergistic Effect ◽  
Corrosion Inhibition ◽  
Hydroxyl Group ◽  
Side Chain ◽  
Imidazolium Cation ◽  
Corrosion Effect ◽  
Inhibition Performance

In this paper the anti-bacterial and the anti-corrosion effect of two different ionic liquids, namely 1-(2-hydroxyethyl)-3-methylimidazolinium chloride ([OH-EMIm]Cl) and 1-ethyl-3-methyleimidazolinium chloride ([EMIm]Cl) was demonstrated. The results revealed that the corrosion inhibition influence of the ionic liquid [OH-EMIm]Cl is higher than that of the ionic liquid [EMIm]Cl. Furthermore, the ionic liquid [OH-EMIm]Cl showed better biocidal influence compared with the ionic liquid [EMIm]Cl. This indicates the synergistic effect due to the incorporation of the hydroxyl group into the side chain of the imidazolium cation leading to enhanced antibacterial and anticorrosion effect.

scholarly journals Green Corrosion Inhibition of Mild Steel by Hydrazone Derivatives in 1.0 M HCl

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 640 ◽  
Author(s):  
Abdelkarim Chaouiki ◽  
Maryam Chafiq ◽  
Hassane Lgaz ◽  
Mustafa R. Al-Hadeethi ◽  
Ismat H. Ali ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Electrochemical Techniques ◽  
Electrochemical Studies ◽  
X Ray ◽  
Maximum Inhibition ◽  
Langmuir Isotherm Model ◽  
Inhibition Performance ◽  
High Inhibition ◽  
Scanning Electron

In the present study, the inhibition performance of two synthesized hydrazone derivatives (HDZs), namely, (E)-N′-(2,4-dimethoxybenzylidene)-2-(6-methoxynaphthalen-2-yl) propanehydrazide (HYD-1) and N′-cyclohexylidene-2-(6-methoxynaphthalen-2-yl) propanehydrazide (HYD-2) on mild steel (MS) in 1.0 M HCl was investigated using weight loss measurements, electrochemical techniques, and scanning electron microscope (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX). The experimental data suggested that the hydrazone derivatives exhibited a high inhibition performance, which increases with increasing their concentrations. HYD-1 and HYD-2 presented maximum inhibition efficiencies of 96% and 84%, respectively, at an optimal concentration of 5 × 10–3 M. The principal observations that resulted from electrochemical studies are that HYDs affected both anodic and cathodic reactions (mixed inhibitors). Their adsorption, which is a combination of chemisorption and physisorption, obeyed the Langmuir isotherm model. Furthermore, the temperature effect was carried out at various temperatures ranging from 303 to 333 K to verify the corrosion inhibition performance of HYD-1 at higher temperatures. Moreover, SEM-EDX analysis confirmed that HYDs can ensure remarkable prevention against corrosion through the adsorption onto the metal surface.

The effect of an N-heterocyclic compound on corrosion inhibition of J55 steel in sweet corrosive medium

2019 ◽  
Vol 43 (16) ◽  
pp. 6303-6313 ◽  
Author(s):  
Ambrish Singh ◽  
K. R. Ansari ◽  
M. A. Quraishi ◽  
Savas Kaya ◽  
Priyabrata Banerjee
Keyword(s):  
Carbon Dioxide ◽  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Corrosion Inhibition ◽  
Heterocyclic Compound ◽  
Potentiodynamic Polarization ◽  
Corrosive Medium ◽  
Electrochemical Impedance ◽  
Nacl Solution

The corrosion inhibition behavior of a naphthoxazinone derivative 1-phenyl-1,2-dihydronaphtho[1,2-e][1,3]oxazin-3-one (PNO) on J55 steel in 3.5 wt% NaCl solution saturated with carbon dioxide was evaluated using weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization.

scholarly journals Molecular Assembly between Weak Crosslinking Cyclodextrin Polymer and trans-Cinnamaldehyde for Corrosion Inhibition towards Mild Steel in 3.5% NaCl Solution: Experimental and Theoretical Studies

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 635 ◽  
Author(s):  
Yucong Ma ◽  
Baomin Fan ◽  
Tingting Zhou ◽  
Hua Hao ◽  
Biao Yang ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
1H Nmr ◽  
Active Sites ◽  
Molecular Assembly ◽  
Proton Nuclear Magnetic Resonance ◽  
Maximum Efficiency ◽  
Nacl Solution ◽  
Cyclodextrin Polymer ◽  
Anodic Reactions

Constructing molecular assembly between a soluble cyclodextrin polymer (SCDP) and an anticorrosive component is conducive to increasing the availability of a corrosion inhibitor with low molecular polarity in aqueous solution. The SCDP was prepared via the weak crosslinking effect of glutaraldehyde using β-cyclodextrin as the subunit, whose structure was confirmed by proton nuclear magnetic resonance spectra (1H NMR), X-ray diffraction and morphology. An assembly between SCDP (host) and trans-cinnamaldehyde (guest, CA) was constructed, and the intermolecular interactions were disclosed by Fourier transform infrared spectra (FTIR). The corrosion inhibition of SCDP/CA assembly for mild steel in 3.5% NaCl solution was assessed through electrochemical and surface analyses. 1H NMR results showed that exterior hydroxyls of β-cyclodextrin were the active sites for crosslinking. Hydrogen bonds might be the binding force between SCDP and CA according to FTIR analyses. Electrochemical measurements revealed that SCDP/CA assembly could suppress both cathodic and anodic reactions and enhance the polarization impedance for mild steel in the corrosive medium with a maximum efficiency of 92.2% at 30 °C. Surface analyses showed that CA molecules could be released from the assembly followed by the energy competition mechanism, and solely adsorb on the steel surface in parallel form, which was further evidenced by theoretical modeling.

scholarly journals Cation Effect in the Corrosion Inhibition Properties of Coumarate Ionic Liquids and Acrylic UV-Coatings

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2611
Author(s):  
Esther Udabe ◽  
Anthony Sommers ◽  
Maria Forsyth ◽  
David Mecerreyes
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Polymer Coating ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Polymer Coatings

Chromate free corrosion inhibitors are searched for to mitigate the economic loss caused by mid-steel corrosion. Here, we show metal-free organic inhibitors having free coumarate anions that can be used either as direct corrosion inhibitors or incorporated into a polymer coating obtained by UV-curing. Four different ionic liquid monomers and polymer coatings with hexoxycoumarate anion and different polymerizable counter cations were investigated. Potentiodynamic polarization, electrochemical impedance spectroscopy, and surface analyses have verified their corrosion inhibition performance on a mild steel AS1020 surface. In the case of the coumarate ionic liquid monomers, the most promising inhibitor is the one coupled with the ammonium cation, showing an inhibition efficiency of 99.1% in solution followed by the imidazolium, pyridinium, and anilinium. Next, the ionic liquid monomers were covalently integrated into an acrylic polymer coating by UV-photopolymerization. In this case, the barrier effect of the polymer coating is combined with the corrosion inhibitor effect of the pendant coumarate anion. Here, the best polymer coatings are those containing 20% imidazolium and pyridinium cations, presenting a greater impedance in the EIS (Electrochemical Impedance Spectroscopy) measurements and less evidence of corrosion in the scribe tests. This article shows that the cationic moiety of coumarate based ionic liquids and poly(ionic liquid)s has a significant effect on their excellent corrosion inhibition properties for a mild steel surface exposed to aqueous chloride solutions.

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