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 Spilanthes acmella Leaves Extract for Corrosion Inhibition in Acid Medium

Coatings ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 106
Author(s):  
Akbar Ali Samsath Begum ◽  
Raja Mohamed Abdul Vahith ◽  
Vijay Kotra ◽  
Mohammed Rafi Shaik ◽  
Abdelatty Abdelgawad ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Active Sites ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Film Formation ◽  
Protective Film ◽  
Surface Protection ◽  
Tafel Polarization ◽  
Spilanthes Acmella

In the present study, the corrosion inhibition effect of Spilanthes acmella aqueous leaves extract (SA-LE) on mild steel was investigated in 1.0 M HCl solution at different temperature using weight loss, Tafel polarization, linear polarization resistance (LPR), and electrochemical impedance (EIS) measurements. Adsorption of inhibitor on the surface of the mild steel obeyed both Langmuir and Temkin adsorption isotherms. The thermodynamic and kinetic parameters were also calculated to determine the mechanism of corrosion inhibition. The inhibition efficiency was found to increase with an increase in the inhibitor concentration i.e., Spilanthes acmella aqueous leaves extract, however, the inhibition efficiency decreased with an increase in the temperature. The phytochemical constituents with functional groups including electronegative hetero atoms such as N, O, and S in the extract adsorbed on the metal surface are found responsible for the effective performance of the inhibitor, which was confirmed by Fourier-transform infrared spectroscopy (FT-IR) and ultraviolet–visible spectroscopic (UV-Vis) studies. Protective film formation against corrosion was confirmed by scanning electron microscopy (SEM), atomic force microscopy (AFM), and contact angle studies. The result shows that the leaves extract acts as corrosion inhibitor and is able to promote surface protection by blocking active sites on the metal.

Electrochemical Studies of some New Mannich Bases Compounds as Corrosion Inhibitors for Mild Steel in Acidic Media

2012 ◽  
Vol 538-541 ◽  
pp. 2329-2333 ◽  
Author(s):  
Hui Xia Feng ◽  
Jian Li ◽  
Xiao Hong Gao
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Steel Corrosion ◽  
Mannich Bases ◽  
Maximum Efficiency ◽  
Tafel Polarization ◽  
Mild Steel Corrosion ◽  
Polarization Studies ◽  
Inhibition Property

The corrosion inhibition behaviour of four selected Mannich bases compounds,namely 3-((N-methyl,N-phenyl)-methyl)2,4-Acetylacetone(MPMAA),3-((N-phenyl)-methyl) 2,4-Acetylacetone (PMAA),3-((N, N-diethyl)-methyl) 2, 4-Acetylacetone(DMAA) and 3-((N, N-methyl)-methyl) 2, 4-Acetylacetone (MMAA) as corrosion inhibitors for mild steel in 1M HCl solutions. Tafel polarization methods were performed to determine the corrosion parameters and inhibition efficiencies. Experimental results showed that PMAA is an excellent inhibitor for mild steel corrosion in 1M HCl solutions; showing a maximum efficiency 92.3% at concentration of 40mg/L. Polarization studies showed that the Mannich bases compounds can be regarded as mixed-type inhibitors and the inhibition efficiency of the four inhibitors followed the order PMAA > MPMAA > DMAA > MMAA. Then scanning electron microscope (SEM)techniques were also employed to examine the mechanism of corrosion inhibition property.

Evaluation of Corrosion Inhibition of Mild Steel in 3.5 wt% NaCl Solution by Cerium Nitrate

2019 ◽  
Vol 26 (11) ◽  
pp. 1634-1642 ◽  
Author(s):  
Ali Dastgheib ◽  
Mohammadreza Mohammadzadeh Attar ◽  
Arman Zarebidaki
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Cerium Nitrate ◽  
Nacl Solution

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 A Comparative Study of Inhibitive Effects of Some Schiff Bases on Mild Steel in Acidic Media by Mass Loss Techniques

2010 ◽  
Vol 7 (4) ◽  
pp. 1230-1237
Author(s):  
Abha Goyal ◽  
V. K. Swami ◽  
S. P. Mathur
Keyword(s):  
Comparative Study ◽  
Mild Steel ◽  
Mass Loss ◽  
Corrosion Inhibition ◽  
Schiff Bases ◽  
Maximum Efficiency ◽  
Acidic Media ◽  
Acidic Solutions

Mass loss techniques have been employed to study the corrosion inhibition of some newly synthesized Schiff bases.viz.N-4-(Diethyl amino) salicylidine-2-amino-5-chloropyridine (SB1),N-(4-ethylbenzalidine)-2-amino-5-chloropyridine (SB2),N-(4-ethylbenzalidine)-2-amino-5-bromopyridine (SB3),N-4-(Diethyl amino) salicylidine-2-amino-5-bromopyridine (SB4) for mild steel in HCl and H2SO4solutions. Results of inhibition efficiencies from the mass loss technique show that Schiff bases are good inhibitors in both the acidic solutions. Inhibition efficiencies increase with the increase in the concentration of acids as well as those of inhibitors. Maximum efficiency for H2SO4was found 99.78% and for HCl it was 97.92%.

The Synergistic Effect of BTA-Co System on the Corrosion Inhibition of Mild Steel in 3.5 wt% NaCl Solution

2018 ◽  
Vol 165 (10) ◽  
pp. C670-C680 ◽  
Author(s):  
Hossein Akhavan ◽  
Mazdak Izadi ◽  
Iman Mohammadi ◽  
Taghi Shahrabi ◽  
Bahram Ramezanzadeh
Keyword(s):  
Synergistic Effect ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Nacl Solution

scholarly journals Role of hydroxyl group in cerium hydroxycinnamate on corrosion inhibition of mild steel in 0.6 M NaCl solution

2019 ◽  
Vol 23 (1) ◽  
pp. 30-42 ◽  
Author(s):  
N.D. Nam ◽  
P.T.N. Ha ◽  
H.T. Anh ◽  
N.T. Hoai ◽  
P.V. Hien
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Hydroxyl Group ◽  
Nacl Solution

scholarly journals Effect of the temperature of cerium nitrate–NaCl solution on corrosion inhibition of mild steel

2020 ◽  
Vol 71 (8) ◽  
pp. 1300-1309 ◽  
Author(s):  
Hichem Boudellioua ◽  
Youcef Hamlaoui ◽  
Lakhdar Tifouti ◽  
Fernando Pedraza
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Cerium Nitrate ◽  
Nacl Solution
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