Inhibiting Effects of Two Derivatives of Amino-Thiophenol on the Corrosion of Copper by Electrochemical Methods

CORROSION ◽  
10.5006/0607 ◽  
2012 ◽  
Vol 68 (12) ◽  
pp. 1119-1125 ◽  
Author(s):  
M. Behpour ◽  
N. Mohammadi
Keyword(s):  
Potentiodynamic Polarization ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Copper Surface ◽  
Langmuir Adsorption Isotherm ◽  
Langmuir Adsorption ◽  
Blank Solution ◽  
Derivatives Of ◽  
Anodic Region ◽  
Methyl Phenyl

Corrosion inhibition of the two thio compounds, 2-{[(2-sulfanyl-phenyl)imino]methyl}phenol (SIMP) and 2-{[(Z)-1-(4-methyl-phenyl)methylidene]amino}-1-benzenthiol (MMAB), as corrosion inhibitors for copper in 15% hydrochloric acid (HCl) have been investigated by potentiodynamic polarization measurements and electrochemical impedance spectroscopy. Potentiodynamic polarization results show that corrosion potentials shift more toward the anodic region in the presence of thio compounds than that of blank solution. The adsorption of inhibitors on the copper surface follows from Langmuir adsorption isotherm. Activation energy (Ea), Gibbs free energy (ΔGads0), enthalpy (ΔH*), and entropy (ΔS*) of corrosion process are calculated by using the experimental measurements.

scholarly journals Newly Synthesized N-Substituted Thiosemicarbazone as a Potential Corrosion Inhibitor for Mild Steel in 1 M HCl

2019 ◽  
Vol 7 (4.14) ◽  
pp. 168
Author(s):  
N Z. Nor Hashim ◽  
K Kassim ◽  
F H. Zaidon
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Potentiodynamic Polarization ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Langmuir Adsorption ◽  
Before And After ◽  
Ft Ir ◽  
L1 And L2

Two N-substituted thiosemicarbazone derivatives namely as 2-(4-chlorobenzylidene)-N-phenylhydrazinecarbothioamide and 2-benzylidene-N-phenylhydrazinecarbothioamide (L1 and L2, respectively) have been tested as corrosion inhibitors on mild steel in 1 M HCl. The ligands were synthesized and investigated using potentiodynamic polarization (PD) and electrochemical impedance spectroscopy (EIS).  The obtained results indicated that inhibition efficiency, (IE, %) L1 increased with increasing inhibitor concentrations which behaved as a good corrosion inhibitor compared to L2. The synthesized ligands were successfully characterized by melting point, elemental analysis (C, H, N, and S), Fourier-transform infrared spectroscopy (FT-IR) and NMR (1H and 13C) spectroscopy. The excellent inhibition effectiveness for both compounds on mild steel before and after immersion in 1 M HCl solution containing 40 ppm of L1 and L2 were also verified by scanning electron microscope (SEM). Based on potentiodynamic polarization results, it can be concluded that all investigated compounds are mixed-type inhibitors and obey the Langmuir adsorption isotherm. 

scholarly journals Fatty Amidine as Copper Corrosion Inhibitor

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Zainal Alim Mas’ud ◽  
Noviyan Darmawan ◽  
Januari Dawolo ◽  
Yusuf Bramastya Apriliyanto
Keyword(s):  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Adsorption Process ◽  
Copper Surface ◽  
Langmuir Adsorption Isotherm ◽  
Copper Corrosion ◽  
Langmuir Adsorption ◽  
New Type ◽  
Corrosion Inhibition Efficiency

The development of green and sustainable corrosion inhibitors for copper in a corrosive marine environment is highly desired. Herein, we studied the fatty acid-based amidine as the new type of renewable corrosion inhibitor. Stearamidine salt was used as a model inhibitor, and it was synthesized through stearonitrile intermediate with an excellent isolated yield of 88%. We used electrochemical (potentiodynamic polarization) and morphological (scanning electron microscopy) measurements to assess the corrosion inhibition efficiency of stearamidine in 3.0 wt.% NaCl at 300 K. We show that, in such a condition, the optimum inhibition efficiency of 96% was achieved using only 0.2 mM stearamidine. The results suggested the fatty amidine is a promising corrosion inhibitor for copper that is suitable in the saltwater ecosystem. The thermodynamic parameters of the interaction between the stearamidine and the copper surface were determined, and the result suggests that the adsorption process occurred accordingly with the Langmuir adsorption isotherm and involved both physisorption and chemisorption.

scholarly journals Electrochemical Behaviourof Some Amino Acids as Corrosion Inhibitors for Mild Steel in Sweet Brine

2021 ◽  
Vol 8 (1) ◽  
pp. 1-14
Author(s):  
León GonzálezJP ◽  
Onofre BustamanteE ◽  
Rodríguez Gómez FJ ◽  
Espinoza Vázquez A
Keyword(s):  
Amino Acids ◽  
Immersion Time ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Charge Transfer Resistance ◽  
Langmuir Adsorption Isotherm ◽  
Transfer Resistance ◽  
Langmuir Adsorption ◽  
Electronic Microscope ◽  
Resistance Improvement

The effect of concentration and immersion time of phenylalanine (Phe), leucine (Leu) and valine (Val) for AISI 1018 in sweet brine was studied trough Electrochemical Impedance Spectroscopy (EIS), polarization resistance (Rp), Scanning Electronic Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) as an ecological and biodegradable alternative as corrosion inhibitors. Electrochemical results showed that amino acids are good corrosion inhibitors according to their charge transfer resistance improvement. The effect of immersion time on corrosion behavior was studied trough 24 h with amino acids concentration variation of 0, 10, 100 and 250 ppm. The preliminary results demonstrated that the three amino acids adsorb over metal surface following the Langmuir adsorption isotherm model, and tend to agglomerate in bulk within time. Keywords: Corrosion Inhibitors; Biodegradable; Amino acids; Sweet brine

Corrosion Inhibition of Mild Steel by N-phenyl-1,4-phenylenediamine and its Schiff Base Derivatives in 1M HCl

2012 ◽  
Vol 554-556 ◽  
pp. 408-413 ◽  
Author(s):  
Nor Zakiah Nor Hashim ◽  
Karimah Kassim ◽  
Yusairie Mohd
Keyword(s):  
Schiff Base ◽  
Corrosion Inhibitors ◽  
Surface Coverage ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Langmuir Adsorption Isotherm ◽  
Additive Concentration ◽  
Langmuir Adsorption ◽  
Corrosion Rates ◽  
Schiff Base Derivatives

The efficiency of two Schiff base compounds namely (E)-N1-benzylidene-N4-phenylbenzene-1,4-diamine (K1) and (E)-N1-(4-methoxybenzylidene)-N4- phenylbenzene-1,4-diamine (K2) as corrosion inhibitors were compared with its parent amine namely N-phenyl-1,4-phenylenediamine (NPPD). Investigations have been made at 25 0C by electrochemical impedance spectroscopy (EIS) and polarization measurements in which the corrosion rates decrease and the percentage inhibition efficiencies and surface coverage degree increase with increasing additive concentration. The adsorption of inhibitors appears to follows Langmuir adsorption isotherm model. Results show K1 to have the highest inhibition efficiency among the three investigated compounds.

scholarly journals Novel pyrimidine-bichalcophene derivatives as corrosion inhibitors for copper in 1 M nitric acid solution

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25314-25333
Author(s):  
Mai A. Khaled ◽  
Mohamed A. Ismail ◽  
Ahmed. A. El-Hossiany ◽  
Abd El-Aziz S. Fouda
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Nitric Acid ◽  
Impedance Spectroscopy ◽  
Acid Solution ◽  
Nitric Acid Solution ◽  
Potentiodynamic Polarization ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Pyrimidine Derivatives

This study targets the investigation of three pyrimidine derivatives (MA-1230, MA-1231, MA-1232) for the prevention of corrosion on copper in 1 M HNO3via weight loss (WL), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) techniques.

scholarly journals Influence of gelatin on corrosion behavior of copper in acid media

2012 ◽  
Vol 66 (2) ◽  
pp. 193-200
Author(s):  
Dragisa Todorovic ◽  
Dragan Milenkovic ◽  
Milutin Milosavljevic ◽  
Dragan Markovic
Keyword(s):  
Adsorption Isotherm ◽  
Corrosion Protection ◽  
Inhibitory Action ◽  
Corrosion Current ◽  
Copper Surface ◽  
Langmuir Adsorption Isotherm ◽  
Copper Corrosion ◽  
Citric Acid Solution ◽  
Acid Media ◽  
Langmuir Adsorption

This paper presents the results of gelatin and benzotriazole (BTA) inhibitory action on copper in the acid medium by the method of weight loss. The investigation was carried out in the citric acid solution (1, 5 and 20%) at the temperature of 293 K. Under such conditions, the gelatin showed higher efficiency of corrosion protection in comparison to BTA. The results, obtained through the Gibbs and Langmuir adsorption isotherm, show that gelatin adsorption on copper surface obey the Langmuir adsorption isotherm model, as well as that the adsorption is a spontaneous process. The polarization measurements show the potential of full passivation shift towards more negative values, and the increase of corrosion current in both cases but being more pronounced with the BTA. The results obtained in this paper indicate that the inhibition gelatin can be used as the BTA substitute for the copper corrosion protection.

scholarly journals Corrosion Inhibition of Zinc Using Some Phenylthiazole Derivatives in Hydrochloric acid Solutions

2008 ◽  
Vol 4 (2) ◽  
pp. 425-440
Author(s):  
Abdel Aziz Fouda ◽  
A. Abdel Nazeerb ◽  
K.M.Abdel Khalek
Keyword(s):  
Weight Loss ◽  
Mixed Type ◽  
Electrochemical Impedance ◽  
Langmuir Adsorption Isotherm ◽  
Acid Solutions ◽  
Langmuir Adsorption ◽  
Hydrochloric Acid Solutions ◽  
Zinc Corrosion ◽  
Temperature Polarization ◽  
Inhibitive Action

The inhibitive action of some phenylthiazole derivatives namely: 2-acetylamino-5-p-bromophenylazo-4-phenylthiazole (BPT), 2-acetylamino-5-p-methylphenylazo-4-phenylthiazole (MPT), 2-acetylamino-5-p-methoxyphenylazo-4-phenylthiazole (XPT) and 2-acetylamino-5-p-nitrophenylazo-4-phenylthiazole (NPT), on zinc corrosion in 0.2 M HCl  has been studied using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS)and electrochemical frequency modulation (EFM) measurements. The results showed that the dissolution rate of zinc decreases with increasing the phenylthiazole derivatives concentration and decreases with raising temperature. Polarization curves indicated that the studied inhibitors act as mixed-type inhibitors. The adsorption of the investigated compounds follows Langmuir adsorption isotherm model. The thermodynamic parameters of adsorption and corrosion processes were determined and discussed. 

Monosaccharide Derivatives as Eco-Friendly Corrosion Inhibitors for Carbon Steel in Neutral and Hydrochloric Acid Media

2020 ◽  
pp. 84-99
Author(s):  
Mohamed Rbaa ◽  
Loubna Lakhrissi ◽  
Younes Lakhrissi ◽  
Parul Dohare ◽  
Brahim Lakhrissi
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Carbon Steel ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Inhibiting Activity ◽  
Acid Media ◽  
Inhibiting Effect ◽  
The Comparative Study ◽  
Hydrochloric Acid Media ◽  
Derivatives Of

In this chapter, the authors present a synthesis of some works carried out within the framework of the study of the corrosion inhibiting activity of a set of monosaccharide derivatives as new biodegradable, nontoxic corrosion inhibitors, and respectful of the environment. The comparative study that they present reveals the existence of more than 20 compounds derivatives of monosaccharide used as corrosion inhibitors in neutral and acidic mediums, and which have given rise to very good corrosion inhibiting efficiencies. These studies of the corrosion inhibiting effect were studied using potentiodynamic polarization curves and electrochemical impedance spectroscopy methods.

scholarly journals Corrosion Inhibition of Mild Steel in Acid Solution by 3,4,5-Trimethoxyphenyl-2-imidazolines

2011 ◽  
Vol 8 (2) ◽  
pp. 671-679 ◽  
Author(s):  
D. Nalini ◽  
R. Rajalakshmi ◽  
S. Subhashini
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Mixed Mode ◽  
Anodic Polarization ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Langmuir Adsorption Isotherm ◽  
Sem Images ◽  
Acid Media ◽  
Langmuir Adsorption

A heterocyclic imidazoline, 3,4,5-trimethoxyphenyl-2-imidazolines (TMP2I) was tested for its corrosion inhibition in 0.5 M H2SO4and 1 M HCl using weight loss, Tafel polarisation and electrochemical impedance techniques. The results show that the inhibition efficiency increases with the increase in concentration of TMP2I and the higher efficiency of about 98% is obtained in both the acid media at 20 ppm. The adsorption of TMP2I obeys Langmuir adsorption isotherm and occurs spontaneously. Cathodic and anodic polarization curves of mild steel in the presence of different concentrations of TMP2I at 300C reveal that it is a mixed type of inhibitor. Electrochemical impedance studies reveal that the system follows mixed mode of inhibition. The surface morphology of the mild steel specimens was evaluated using SEM images

scholarly journals Corrosion inhibition of iron in chloride media by the aqueous extract of Curcuma longa rhizome powder

2021 ◽  
Vol 48 (2) ◽  
Author(s):  
Imen AbidlI ◽  
◽  
Nébil Souissi ◽  
X. Ramón Novoa ◽  
◽  
...  
Keyword(s):  
Aqueous Extract ◽  
Electrochemical Impedance ◽  
Curcuma Longa ◽  
Charge Transfer Resistance ◽  
Langmuir Adsorption Isotherm ◽  
Nacl Solution ◽  
Iron Corrosion ◽  
Transfer Resistance ◽  
Time Effects ◽  
Langmuir Adsorption

The effect of the aqueous extract of Curcuma Longa Rhizome Powder and their main constituents involve phenolic compounds, as an iron corrosion inhibitor in 0.1 M NaCl solution was tested. Electrochemical impedance spectroscopy (EIS) was employed as the main experimental technique to assess the electrochemical behavior of iron in different concentrations of Curcuma extract. EIS revealed an increase of the charge transfer resistance with increasing inhibitor concentration. The temperature and immersion time effects on the corrosion behavior of iron without and with the extract of Curcuma were also studied. The inhibition action of the extract was discussed in view of the Langmuir adsorption isotherm.

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