Synthesis and Inhibition Performance of Two Imidazoline Corrosion Inhibitors with Different Hydrophilic Groups

2012 ◽  
Vol 468-471 ◽  
pp. 2478-2482 ◽  
Author(s):  
Guo Dong Fan ◽  
Meng Ya Cui
Keyword(s):  
Weight Loss ◽  
Hydrochloric Acid ◽  
Ir Spectrum ◽  
Quaternary Ammonium ◽  
Benzyl Chloride ◽  
Corrosion Inhibitors ◽  
Weight Loss Measurement ◽  
Loss Measurement ◽  
Inhibition Performance ◽  
Maize Oil

Imidazoline quaternary ammonium salt (IM) was synthesized in this paper by maize oil, 2-(aminoethylamino) ethanol and benzyl chloride. Then it was modified by urea and thiourea to obtain IM-O and IM-S respectively. The products were analyzed with IR spectrum and 1HNMR spectrum. The corrosion inhibition performance of IM-O and IM-S was evaluated by weight-loss measurement of A3 steel in hydrochloric acid. The compare research in the concentrations of the corrosion inhibitor, the concentrations of hydrochloric acid, the temperature of pickling, the time of pickling and the concentrations of Fe3+ were done. The results show that the two compounds are good inhibitors for A3 steel and the IM-O has stronger corrosion inhibiting ability than IM-S.

scholarly journals Corrosion and Kinetic Study of Eucalyptus camaldulensis Seeds Extract Percolated with Methanol on Aluminium Coupons in HCl

2020 ◽  
pp. 61-76
Author(s):  
Ishaq Yahaya Lawan ◽  
Fatima Khalil Abdullah ◽  
Sani Idris ◽  
Shinggu D. Yamta ◽  
Abdurrahman Hudu
Keyword(s):  
Weight Loss ◽  
Kinetic Study ◽  
Adsorption Mechanism ◽  
Eucalyptus Camaldulensis ◽  
Aluminum Surface ◽  
Chemical Adsorption ◽  
Weight Loss Measurement ◽  
Thermodynamic Consideration ◽  
Loss Measurement ◽  
Inhibitor Efficiency

This research discusses a detail optimization of Eucalyptus camaldulensis seeds extract as corrosion inhibitor for aluminum coupons in HCl using weight loss measurement and kinetic study. The result shows that the maximum inhibitor efficiency was obtained at a concentration of 2.0 (%W/V). However the highest inhibitor efficiency of 85% was obtained at 50ºC and the least inhibitor efficiency of 29% was obtained at 30ºC. Thermodynamic consideration revealed that adsorption of inhibitor of aluminum surface was exothermic and consistent with chemical adsorption mechanism.

Adsorption behavior of tautomeric forms of 2-aminino-5-mercato-1,3,4 – thiadizole as corrosion inhibitor on copper surface

2016 ◽  
Vol 63 (6) ◽  
pp. 452-460 ◽  
Author(s):  
Sang Xiong ◽  
Jianlin Sun ◽  
Yang Xu ◽  
Xundong Yan
Keyword(s):  
Weight Loss ◽  
Corrosion Inhibitor ◽  
Adsorption Energy ◽  
Copper Surface ◽  
Adsorption Behavior ◽  
Weight Loss Measurement ◽  
Content Type ◽  
Loss Measurement ◽  
Polar Groups ◽  
Tautomeric Forms

Purpose The purpose of this study is to evaluate the effect of the four tautomeric forms of 2-amino-5-mercatpo-1,3,4-thiadizole (AMT) absorbed on copper surface by the polar or non-polar groups. Polar group of AMT is mostly electronegative with larger N and S atoms as central atoms. 5-amino-1,3,4-thiadiazole-2(3H)-thion (AMT-c) has the highest adsorption energy and is easy to react with copper. The interaction between AMT-c and copper conforms to chemisorption, which is to be further verified by the experiment on the weight loss measurement. Design/methodology/approach Adsorption behavior of AMT as corrosion inhibitor on copper surface in oil field was studied by weight loss measurement, and the corrosion inhibition mechanism was analyzed. Reactive sites and distributions of tautomeric forms of AMT as inhibitor on Cu(100) crystal plane were calculated by density functional theory. Findings All atoms of AMT are in the same plane, and AMT is an aromatic ring structure by large p-chain adsorbed on the metal surface by a plane configuration. AMT-c has the highest adsorption energy and also the most stable isomerized product. The determinate locations of AMT on the Cu(100) surface are the bridge and the hollow sites using molecular dynamics. Corrosion of copper can be effectively inhibited by AMT, which is a kind of excellent corrosion inhibitor, and this property is attributed to the polar groups and non-polar groups of AMT that play a role as absorption and shielding on copper surface, respectively. Inhibition efficiency is increased with the increase in the concentration of the inhibitor. The maximum efficiency of 92 per cent is obtained for 50 ppm AMT concentration at 373 K, which is attributed to the presence of extensively delocalized electrons of the phenyl rings, planarity and the presence of lone pair of electrons on N and S atoms, which favored a greater adsorption of inhibitors on copper surface. Originality/value Corrosion of copper can be effectively inhibited by AMT, which is a kind of excellent corrosion inhibitor, and this property is attributed to the polar groups and non-polar groups of AMT that play a role as absorption and shielding on copper surface, respectively. Adsorption of AMT as corrosion inhibitor on copper surface obeys Langmuir isotherm. The interaction between AMT and copper conforms to chemisorption, which is to be further verified by the experiment on the weight loss measurement.

Adsorption Behavior and Inhibition of N,N-Diethylammonium O,O'-Dicyclohexydithiophosphate for Carbon Steel in Acid Medium

2011 ◽  
Vol 239-242 ◽  
pp. 347-351 ◽  
Author(s):  
Bin Xie ◽  
Chuan Lai ◽  
Li Ke Zou ◽  
Xiang Mei Zeng ◽  
Chun Huang ◽  
...  
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Standard Free Energy ◽  
Weight Loss Measurement ◽  
Free Energy Of Adsorption ◽  
Loss Measurement ◽  
Force Microscopy ◽  
Carbon Steel Surface ◽  
Microscopy Techniques ◽  
Hcl Solution

The inhibition effect of N,N-diethylammonium O,O'-dicyclohexyldithiophosphate(NOCP) against the corrosion of carbon steel in HCl solution was studied by weight loss measurement, potentiodynamic polarization and atomic force microscopy techniques. The studies of weight loss measurement show that the inhibition efficiency was up to 99.54 % at the inhibitor concentration of 2.717×10-4 M in 1.0 M HCl solution at 25°C. The adsorption of NOCP on carbon steel surface obeys the Langmuir isotherm. Polarization curves indicate NOCP is a mixed-type inhibitor, and the obtained standard free energy of adsorption suggests that the chemisorption takes place spontaneously. The effects of temperature, acid concentration and immersion time were also studied.

Study of hot corrosion of alloy 800 using linear polarisation resistance and weight loss measurement

2001 ◽  
Vol 17 (7) ◽  
pp. 880-885 ◽  
Author(s):  
C. Cuevas-Arteaga ◽  
J. Porcayo-Calderon ◽  
G. Izquierdo ◽  
A. Martinez-Villafane ◽  
J.G. Gonzalez-Rodriguez
Keyword(s):  
Weight Loss ◽  
Hot Corrosion ◽  
Weight Loss Measurement ◽  
Loss Measurement ◽  
Polarisation Resistance ◽  
Alloy 800 ◽  
Linear Polarisation

scholarly journals 1-Butyl-3-Methylimidazolium Chloride Ionic Liquid as Inhibitor for Corrosion Protection of Mild Steel in Acidic Media

2019 ◽  
Vol 7 (4.14) ◽  
pp. 146
Author(s):  
A A. Ahmad Tarmizi ◽  
L Peter ◽  
D Ahtoi ◽  
R Yusof ◽  
S N.A. Syed Ismail ◽  
...  
Keyword(s):  
Weight Loss ◽  
Ionic Liquid ◽  
Mild Steel ◽  
Sulphuric Acid ◽  
Corrosion Protection ◽  
Corrosion Performance ◽  
Weight Loss Measurement ◽  
Scanning Electronic Microscopy ◽  
Acidic Media ◽  
Loss Measurement

Corrosion inhibitor is a substance added to the corrosive environment in small quantities to reduce the corrosion a metal. The addition of inhibitors will reduce the corrosion rate of the metal by retarding the corrosion process on the metal surface. Thus, this study focused on the study of the effectiveness of 1- butyl-3-methylimidazolium chloride ([EMIM]Cl) ionic liquid as an inhibitor for corrosion protection of mild steel. Two different concentrations of [EMIM]Cl (0.05 M and 0.5 M) were tested into different concentrations of sulphuric acid (0.05M, 0.10 M, 0.15 M, 0.20 M and 0.25 M). Weight loss measurement was used to determine the effectiveness of the [EMIM]Cl as inhibitor for corrosion protection. Results showed that acid concentrations play an important role for the corrosion protection process in the presence of the inhibitor. The weight loss increases as the concentration of the acid increased. The study also revealed that the concentrations of [EMIM]Cl ionic liquid effect the performance of the inhibitor. From this study, 0.5 M of [EMIM]Cl ionic liquid shows better corrosion performance compared to 0.05 M of [EMIM]Cl. At 0.25 M of sulphuric acid, the weight loss of untreated metal increased drastically from 0.0075 g at 0.5 hour to 0.0974 g at 24 hours. After treated with 0.5 M of [EMIM]Cl, the weight loss measurement slightly increased from 0.0027 g at 0.5 hour to 0.0179 g at 24 hours. This weight loss value is lower compared to mild steel treated with 0.05 M [EMIM]Cl which is 0.0469 g at 24 hours. The performance of the inhibitor in two different type of acid was also investigated. The morphology of the untreated mild steel and mild steel treated with [EMIM]Cl was investigated by scanning electronic microscopy (SEM)  

scholarly journals Quantum chemical elucidation on corrosion inhibition efficiency of Schiff base: DFT investigations supported by weight loss and SEM techniques

2020 ◽  
Vol 15 (2) ◽  
pp. 202-209 ◽  
Author(s):  
Ahmed Al-Amiery ◽  
Taghried A Salman ◽  
Khalida F Alazawi ◽  
Lina M Shaker ◽  
Abdul Amir H Kadhum ◽  
...  
Keyword(s):  
Weight Loss ◽  
Schiff Base ◽  
Hydrochloric Acid ◽  
Corrosion Inhibition ◽  
Quantum Chemical ◽  
Density Functional ◽  
Inhibition Efficiency ◽  
Chemical Calculation ◽  
Acid Environment ◽  
Inhibition Performance

Abstract The corrosion inhibition of Schiff base, namely 2-((2-hydroxy-5-methoxybenzylidene)amino)pyridine (HMAP), for mild steel (MS) in a 1 M hydrochloric acid environment was investigated by means of weight loss and scanning electron microscopy techniques. Quantum chemical calculation based on density functional theory (DFT) was carried out on HMAP. Results illustrated that HMAP is a superior inhibitor for the corrosion of MS in 1.0M hydrochloric acid environment, and inhibition efficiency is higher than 90.0% at 0.5 g/L HMAP. Inhibition performance increases with regard to concentration increase and inhibition performance decreases when raising temperature. Adsorption of the inhibitor on the MS surface followed Langmuir adsorption isotherm and the value of the free energy of adsorption; ΔGads indicated that the adsorption of HMAP was a physisorption/chemisorption process. The DFT refers to perfect correlation with methodological inhibition performance.

Corrosion Inhibition by a Caesalpinia Sappan L Modified Imidazoline for Carbon Steel API 5L Grade X60 in HCl 1M Environment

2018 ◽  
Vol 929 ◽  
pp. 158-170
Author(s):  
Adam Septiyono Arlan ◽  
Norman Subekti ◽  
Johny Wahyuadi Soedarsono ◽  
Andi Rustandi
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Impedance Spectroscopy ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Oil And Gas ◽  
Caesalpinia Sappan ◽  
Wide Range ◽  
Inhibition Performance ◽  
Green Corrosion Inhibitors

Acidizing is one of the stimulation technologies in the oil and gas industry by removing scale, rust, debris or other acid-soluble particulates on the pipe tubing internal surface. The most common acid used is HCl. To avoid problems such as pipe or casing tubing leak due to acidic corrosion, during the acidizing normally applied with inhibition treatment by inorganic corrosion inhibitor with various compositions including quaternary ammonium salts, solvent and often some surfactant to strip oil from acid reactive surfaces. However, most of these compounds are not only expensive but also toxic to the marine environment. It is an obvious remark to point out the importance of low cost, green corrosion inhibitors which is safe to the environment. The wood extract has become important as an environmentally acceptable, readily available and renewable resource for wide range of inhibitors. A Caesalpinia Sappan L modified imidazoline has been synthesized and used as a corrosion inhibitor for carbon steel in API 5L X60 in HCl 1M environment.The aim of the investigation is to find low dosage-high efficiency green corrosion inhibitor.The testing techniques include wheel test weight loss measurement, Tafel polarization and Electrochemical Impedance Spectroscopy (EIS), Fourier Transform Infra-red Spectroscopy (FTIR). The results of weight loss studies correlated well with those of polarization and Impedance Spectroscopy. Inhibition performance for both Caesalpinia Sappan L modified imidazoline ( CS IMI) and Imidazoline (IMI) increases with increasing inhibitor concentration. The formulated Caesalpinia Sappan L modified imidazoline ( CS IMI), and Imidazoline (IMI) inhibitors give a greater than 90% inhibition efficiency with dosage 25 ppm at a temperature of 90-140°F. Caesalpinia Sappan L modified imidazoline (CS IMI), and Imidazoline (IMI) show comparable inhibition performance. However, at temperature 140oF, Imidazoline (IMI) seems to have a slightly better performance, indicating better thermal stability. Caesalpinia sappan bioactive agents are brazilein and chalcone, and its inhibition mechanism by physisorption obey Langmuir Isotherm, this mode will control charge transfer at surface metal and electrolyte.This result confirms that Caesalpinia sappan modified imidazoline is very promising for the development of green corrosion inhibitors for oil and gas application

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.

Study of Garlic Extract as a Green Corrosion Inhibitor for Mild Steel in Acidic Media

2014 ◽  
Vol 960-961 ◽  
pp. 118-125 ◽  
Author(s):  
Bo Yang ◽  
Wu Chen ◽  
Dan Hua Mu
Keyword(s):  
Amino Acids ◽  
Hydrochloric Acid ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Corrosion Potential ◽  
Garlic Extract ◽  
Main Ingredient ◽  
Acidic Media ◽  
Green Corrosion Inhibitor ◽  
Inhibition Performance

This paper studies extract as corrosion inhibitors extracted from garlic. The IR spectrum analysis of the extract shows that the main ingredient of extract is amino acids, and the better extracting condition is that 30°C50mL 10%H2SO4and 20g peeled garlic react for 120.0h, and composite amino acids content in the extract is 19.0mg/L. The result of corrosion inhibition performance using static weight loss shows that the dosage of the extract, temperature and concentration of acidic mediums have effect on corrosion inhibition remarkably. The corrosion inhibitive efficiency for A3 steel is 93.26% in 5% Hydrochloric acid and 79.2% in5% mud acid when the dosage of the garlic extract is 4.0%(V/V) and 6.0%(V/V),respectively. The investigated results of electrochemistry performance of the extract indicates that corrosion potential of A3 steel shift in negative direction both in Hydrochloric acid and in mud acid, which indicates that the extract are inhibitors of inhibiting cathodic corrosion, and circular-arc radius of alternating-current impedance spectroscopy increase notably in acidic medium, and corrosion inhibition effect is remarkable. Therefore, it is feasible to extract inhibitors from garlic.

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