The Research of Thiosemicarbazide Modified as Acidizing Corrosion Inhibitor

2015 ◽  
Vol 723 ◽  
pp. 605-609
Author(s):  
Ke Hua Li ◽  
Bing Bing Yang ◽  
Zhi Wei Lan ◽  
Ren Fang Wang ◽  
Tie Jun Su
Keyword(s):  
Weight Loss ◽  
Potentiodynamic Polarization ◽  
Corrosion Inhibitors ◽  
Mannich Base ◽  
Activation Parameters ◽  
Mannich Bases ◽  
Langmuir Adsorption ◽  
N80 Steel ◽  
Thiosemicarbazide Derivatives ◽  
Good Agreement

Corrosion inhibition of N80 steel in 15% HCl was investigated in the absence and presence of different concentrations of some thiosemicarbazide derivatives (Mannich baseI, Mannich baseII) by weight loss, potentiodynamic polarization techniques. The adsorption of Mannich bases obeyed Langmuir adsorption isotherm. Both thermodynamic and activation parameters were calculated and discussed. The absorption process of Mannich base corrosion inhibitors on the surface of N80 steel is spontaneous, endothermic and entropy increase process. Polarization curves indicated that the inhibitor of Mannich bases are the mixed corrosion-controlling one which inhibited anodie corrosion. The results obtained from weight loss, Potentiodynamic polarization are in good agreement.

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 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 GREEN INHIBITORS FOR CORROSION PROTECTION OF N80 CARBON STEEL IN 1M HCl AQUEOUS SOLUTIONS

2012 ◽  
Vol 20 (20) ◽  
pp. 77-98
Author(s):  
A. H. EL-ASKALANY ◽  
S. I. MOSTAFA ◽  
A. M. EID
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Adsorption Process ◽  
Electrochemical Impedance ◽  
Physical Adsorption ◽  
Polarization Studies ◽  
Inhibitive Action ◽  
Good Agreement

The inhibitive action of Saponinic extract of both Zygophylium album and Zygophylium Egyptian leaves which could serve as eco-friendly materials was investigated on the corrosion of N80 carbon steel in 1 M HCl solution. The techniques employed for the study were weight loss measurements. potentiodynamic polarization, electrochemical frequency modulation (EFM), and electrochemical impedance spectroscopy (EIS). The results obtained show that these extracts could serve as an effective inhibitor for N80 carbon steel. The percentage inhibition increases with increasing concentration of the inhibitor at 25 °C The percentage inhibitor efficiency above 90% was obtained at a concentration of 700 ppm for both extracts. The corrosion rates of steel and inhibitive efficiencies obtained from impedance and polarization measurements were in good agreement with those obtained from weight loss measurements. Potentiodynamic polarization studies clearly reveal that both extracts act as mixed-type inhibitors The study shows that the inhibition efficiency decreased with the temperature rise of the medium. Heat of adsorption and thermodynamic parameters and indicated that the adsorption process is mainly controlled by the physical adsorption process.

Bis-Mannich bases as effective corrosion inhibitors for N80 steel in 15% HCl medium

2021 ◽  
pp. 117957
Author(s):  
Xiaoyun Zhang ◽  
Meng Zhang ◽  
Zhisong Zhang ◽  
Qing Li ◽  
Renqing Lv ◽  
...  
Keyword(s):  
Corrosion Inhibitors ◽  
Mannich Bases ◽  
N80 Steel ◽  
Hcl Medium

Molybdates as Corrosion Inhibitors in the Presence of Chlorides

CORROSION ◽  
1976 ◽  
Vol 32 (7) ◽  
pp. 263-266 ◽  
Author(s):  
E. A. LIZLOVS
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Potentiodynamic Polarization ◽  
Room Temperature ◽  
Corrosion Inhibitors ◽  
Corrosion Potential ◽  
Chloride Content ◽  
Passive State ◽  
Chloride Sulfate ◽  
Polarization Studies

Abstract The effect of the molybdate ion (MoO4=) concentration on the corrosion inhibition of 1010 steel was investigated in aerated chloride/sulfate-containing solutions. The chloride content was 304 ppm Cl−, and the sulfate was 352 ppm SO4=. Weight loss measurements and electrochemical methods were employed for the investigation. The pH was controlled at 8.7. Weight loss measurements indicated that about 165 ppm of molybdate reduced the corrosion rate below 10 mg·dm−2/day at room temperature. At 160 F (71 C), about 50 ppm of molybdate reduced the corrosion rate to 4 to 5 mg·dm−2/day. The potentiodynamic polarization studies and the examination of corrosion potential and immersion time relationship disclosed that the molybdate ion acts as a passivating agent in the presence of oxygen. Passivity was also obtained under potentiodynamic polarization conditions in a nitrogenated solution. No passivation was obtained in the absence of the molybdate ion. For spontaneous passivation, both molybdate and oxygen (oxidizing agent) were needed. Corrosion rates in a passive state according to the polarization curve should be nil.

scholarly journals Acetylcholine and Rivastigmine as Corrosion Inhibitors of Cu – Sn - Zn – Pb Alloy in Hydrochloric Acid Environment: DFT & Electrochemical Approach

2021 ◽  
Vol 25 (8) ◽  
pp. 1441-1448
Author(s):  
B.U. Ugi ◽  
V.M. Bassey ◽  
M.E. Obeten ◽  
S.A. Adalikwu ◽  
E.C. Omaliko ◽  
...  
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Hydrochloric Acid ◽  
Impedance Spectroscopy ◽  
Potentiodynamic Polarization ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Transfer Resistance ◽  
Electrochemical Approach ◽  
Acid Environment

The study on the action of Acetylcholine and Rivastigmine as Corrosion Inhibitors of Cu – Sn - Zn – Pb Alloy in Hydrochloric Acid Environment was carried out using density functional theory, electrochemical impedance spectroscopy, Potentiodynamic polarization, Scanning electron microscopy and weight loss. The result revealed that both Acetylcholine and Rivastigmine expired drugs were good inhibitors of Cu – Sn - Zn – Pb Alloy in Hydrochloric Acid Environment. This was confirmed from results of weight loss (99.1 % and 95.0 %), electrochemical impedance spectroscopy (EIS) (92.5 % and 91.8 %), and Potentiodynamic polarization (97.4 % and 87.1 %). Both inhibitors were able to increase the charge transfer resistance and corrosion current densities of the electrical solution and reduce the double layer capacitance of the metal – solution interface. Inhibition was as a result of adsorption of inhibitor molecules on the Cu – Sn - Zn – Pb surface. Thermodynamically, inhibitors showed greater stability on metal surface, spontaneous in the forward direction and reduction in level of disorderliness. Inhibitors demonstrated a mixed type inhibition while physical adsorption mechanism was proposed for the inhibitor – metal interaction. Langmuir adsorption isotherm was obeyed as data fitted adequately to the isotherm and regression coefficient was approximately unity. A monolayer adsorption was deduces.

scholarly journals Inhibitive Action of Ferrous Gluconate on Aluminum Alloy in Saline Environment

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Patricia Abimbola Idowu Popoola ◽  
Sanni Omotayo ◽  
Cleophas A. Loto ◽  
Olawale Muhammed Popoola
Keyword(s):  
Weight Loss ◽  
Aluminum Alloy ◽  
Aluminium Alloy ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Saline Environment ◽  
Ferrous Gluconate ◽  
Inhibitive Action ◽  
Good Agreement ◽  
Mixed Type Inhibitor

The corrosion of aluminum in saline environment in the presence of ferrous gluconate was studied using weight loss and linear polarization methods. The corrosion rates were studied in different concentrations of ferrous gluconate 0.5, 1.0, 1.5, and 2.0 g/mL at 28°C. Experimental results revealed that ferrous gluconate in saline environment reduced the corrosion rate of aluminum alloy at the different concentrations studied. The minimum inhibition efficiency was obtained at 1.5 g/mL concentration of inhibitor while the optimum inhibition efficiency was achieved with 1.0 g/mL inhibitor concentration. The results showed that adsorption of ferrous gluconate on the aluminium alloy surface fits Langmuir adsorption isotherm. The potentiodynamic polarization results showed that ferrous gluconate is a mixed type inhibitor. Ferrous gluconate acted as an effective inhibitor for aluminium alloy within the temperature and concentration range studied. The data obtained from weight loss and potentiodynamic polarization methods were in good agreement.

Investigation of Some Mannich Bases Corrosion Inhibitors for Carbon Steel

2015 ◽  
Vol 227 ◽  
pp. 63-66
Author(s):  
Ileana Manciulea ◽  
Cristina Bogatu ◽  
Cristina Cazan ◽  
Lucia Dumitrescu ◽  
Anca Duta
Keyword(s):  
Carbon Steel ◽  
Potentiodynamic Polarization ◽  
Corrosion Current Density ◽  
Corrosion Inhibitors ◽  
Sea Water ◽  
Corrosion Current ◽  
Mannich Bases ◽  
Different Types ◽  
Protection Mechanisms ◽  
Polarization Studies

The paper presents the results obtained when using two ketonic Mannich bases (BM1 and BM2) as corrosion inhibitors in saline (standard sea water-3.5% NaCl) for different types of steel, with various alloying elements. The corrosion experiments were performed by potentiodynamic polarization studies. Based on the polarization curves, the corrosion current density and rate were calculated. The inhibitors efficiencies were evalued and the protection mechanisms were discussed.

Mechanism of Steel Corrosion Inhibition Using Mannich Bases

2009 ◽  
Vol 79-82 ◽  
pp. 1963-1966
Author(s):  
Cristina Bogatu ◽  
Ileana Manciulea ◽  
Anca Duta
Keyword(s):  
Potentiodynamic Polarization ◽  
Corrosion Current Density ◽  
Corrosion Inhibitors ◽  
Steel Corrosion ◽  
Corrosion Current ◽  
Mannich Bases ◽  
Saline Environment ◽  
Different Types ◽  
Protection Mechanisms ◽  
Polarization Studies

The paper presents the results obtained when using Mannich bases (and derivatives) as corrosion inhibitors in saline environment, for different types of steels, with various alloying elements. The Mannich basis (ketonic combinations with naphtenic and nitrogen containing rings) were synthesized as such (polar) and as chlorhydrates (ionic) and used in corrosion experiments, in concentrations varying from 0….1300 ppm. The corrosion experiments were performed by potentiodynamic polarization studies. Based on the polarization curves, the corrosion current density and rate were calculated. The inhibitor efficiency was evaluated and based on these values the protection mechanisms was discussed.

scholarly journals Synthesis of Bimannich Base with Thiazole and Its Corrosion Inhibition Effect on H2S and CO2 at High Temperature

2021 ◽  
Author(s):  
Zhuoke Li ◽  
Jun Cao ◽  
Ting Mao ◽  
Dan Ni
Keyword(s):  
Weight Loss ◽  
Free Energy ◽  
Corrosion Inhibition ◽  
Surface Coverage ◽  
Mannich Base ◽  
Synthesis Method ◽  
Langmuir Adsorption Isotherm ◽  
Liquid Environment ◽  
Inhibition Effect ◽  
Langmuir Adsorption

Abstract A bimannich base TZBM containing a thiazole structure was obtained by the mannich base synthesis method. TZBM can maintain a stable structure at 260°C, and has a good corrosion inhibition effect on carbon steel in a gas-liquid environment containing Cl−+H2S + CO2 at 180°C. Through the weight loss test of steel under different concentrations of TZBM, the degree of surface coverage of the adsorbed inhibitor is determined, and it was found that the results obey the Langmuir adsorption isotherm. And the negative Gibbs free energy indicates that the adsorption is spontaneous.

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