scholarly journals A Study of N,N-Diethylammonium O,O′-Di(p-methoxyphenyl)dithiophosphate as New Corrosion Inhibitor for Carbon Steel in Hydrochloric Acid Solution

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Chuan Lai ◽  
Bin Xie ◽  
Changlu Liu ◽  
Wan Gou ◽  
Lvshan Zhou ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Corrosion Inhibitor ◽  
Storage Time ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Hydrochloric Acid Concentration ◽  
Carbon Steel Surface ◽  
And Storage ◽  
Mixed Type Inhibitor

N,N-Diethylammonium O,O′-di(p-methoxyphenyl)dithiophosphate (EAPP) as a new corrosion inhibitor was synthesized in the present work. The corrosion inhibition of EAPP in hydrochloric acid for carbon steel was evaluated by potentiodynamic polarization measurements, electrochemical impedance spectroscopy, weight loss measurements, and scanning electron microscopy. The results indicate that the EAPP is mixed type inhibitor, and the adsorption of EAPP on carbon steel surface obeys Langmuir isotherm. In addition, the inhibition efficiency increases with increasing the concentration of inhibitor and decreases with increasing the hydrochloric acid concentration, temperature, and storage time.

Adsorption Behavior and Corrosion Inhibition of S-Benzyl o-Phenylenedioxydithiophosphate for Carbon Steel in Hydrochloric Acid Solution

2014 ◽  
Vol 937 ◽  
pp. 109-112
Author(s):  
Xiu Lan Zhang ◽  
Xiao Lin ◽  
Bin Xie ◽  
Li Ke Zou ◽  
Sha Sha Zhu ◽  
...  
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Corrosion Inhibition ◽  
Hydrochloric Acid Solution ◽  
Hydrochloric Acid Concentration ◽  
Carbon Steel Surface ◽  
Effects Of Temperature ◽  
Mixed Type Inhibitor

The corrosion inhibition of S-benzyl o-phenylenedioxydithiophosphate (BPOTP), for carbon steel in hydrochloric acid solution was studied by electrochemical measurements and weight loss measurements. Polarization curves indicate BPOTP is a mixed-type inhibitor, and the effects of temperature, hydrochloric acid concentration and immersion time were also studied. The studies of weight loss measurement show that the inhibition efficiency was up to 92.82 % at the BPOTP concentration of 40 mg·L-1 in 1.0 M hydrochloric acid solution at 30°C. The adsorption of BPOTP on carbon steel surface obeys the Langmuir isotherm.

Adsorption Behavior and Corrosion Inhibition of S-benzyl-O,O'-dibenzyldithiophosphate for Carbon Steel in Hydrochloric Acid Solution

2013 ◽  
Vol 781-784 ◽  
pp. 295-298
Author(s):  
Yan Lu ◽  
Sha Sha Zhu ◽  
Bin Xie ◽  
Chuan Lai ◽  
Qin Huan Yang ◽  
...  
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Corrosion Inhibition ◽  
Hydrochloric Acid Solution ◽  
Hydrochloric Acid Concentration ◽  
Carbon Steel Surface ◽  
Effects Of Temperature ◽  
Mixed Type Inhibitor

The corrosion inhibition of S-benzyl-O,O'-dibenzyldithiophosphate (BBP) for carbon steel in hydrochloric acid solution was studied by electrochemical measurements and weight loss measurements. Polarization curves indicate BBP is a mixed-type inhibitor, and the effects of temperature, hydrochloric acid concentration and immersion time were also studied. The studies of weight loss measurement show that the inhibition efficiency was up to 97.39 % at the BBP concentration of 60 mg·L-1 in 1.0 M hydrochloric acid solution at 30°C. The adsorption of BBP on carbon steel surface obeys the Langmuir isotherm.

ANTI CORROSION ACTIVITY OF ETHYLENE TETRA PHOSPHONIC ACID–Cu2+ SYSTEM ON CARBON STEEL IN H2SO4 SOLUTION

2019 ◽  
Vol 27 (07) ◽  
pp. 1950180
Author(s):  
D. KAMELI ◽  
N. ALIOUANE ◽  
H. HAMMACHE-MAKHLOUFI ◽  
L. MAKHLOUFI
Keyword(s):  
Carbon Steel ◽  
Phosphonic Acid ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Protective Film ◽  
Corrosion Activity ◽  
Langmuir Adsorption ◽  
Carbon Steel Surface ◽  
Polarization Studies ◽  
Mixed Type Inhibitor

The anti-corrosion activity of a newly synthesized ethylene tetra phosphonic acid (ETPA), namely {Ethylenebis [(2-hydroxy-5,1,3-phenylene) bismethylene]} tetraphosphonic acid, against the corrosion of carbon steel in 0.5-M H2SO4 medium and its synergistic effect with Cu[Formula: see text] ions were studied using potentiodynamic polarizations and electrochemical impedance spectroscopy (EIS). Potentiodynamic polarization studies indicate that ETPA acts as a mixed-type inhibitor and inhibition efficiency increases with increasing ETPA concentration. The adsorption of ETPA at the surface of carbon steel follows Langmuir adsorption isotherm. EIS results demonstrated the adsorption of ETPA onto the carbon steel surface, leading to the formation of ETPA overlaying film. Addition of [Formula: see text] M Cu[Formula: see text], at low ETPA concentration ([Formula: see text] M), results in significant increase in inhibition efficiency (88%), superior to that obtained at high ETPA concentration (81% at [Formula: see text] M). SEM and EDAX analyses confirmed the existence of a uniform protective film on the electrode surface attributed to ETPA–Cu[Formula: see text] complex formation.

scholarly journals Experimental Theoretical Studies on Extract of Date Palm Seed as a Green Anti-Corrosion Agent in Hydrochloric Acid Solution

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3535
Author(s):  
Naba Jasim Mohammed ◽  
Norinsan Kamil Othman ◽  
Mohamad Fariz Mohamad Taib ◽  
Mohd Hazrie Samat ◽  
Solhan Yahya
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Active Sites ◽  
Immersion Time ◽  
Steel Surface ◽  
Date Palm ◽  
Inhibition Efficiency ◽  
Experimental Results ◽  
Plant Materials ◽  
Carbon Steel Surface

Extracts from plant materials have great potential as alternatives to inorganic corrosion inhibitors, which typically have harmful consequences. Experimental and theoretical methodologies studied the effectiveness of agricultural waste, namely, date palm seed extract as a green anti-corrosive agent in 0.5 M hydrochloric acid. Experimental results showed that immersion time and temperature are closely related to the effectivity of date palm seed as a corrosion inhibitor. The inhibition efficiency reduced from 95% to 91% at 1400 ppm when the immersion time was increased from 72 h to 168 h. The experimental results also indicated that the inhibition efficiency decreased as the temperature increased. The presence of a protective layer of organic matter was corroborated by scanning electron microscopy. The adsorption studies indicated that date palm seed obeyed Langmuir adsorption isotherm on the carbon steel surface, and Gibbs free energy values were in the range of −33.45 to −38.41 kJ·mol−1. These results suggested that the date palm seed molecules interacted with the carbon steel surface through mixture adsorption. Theoretical calculations using density functional theory showed that the capability to donate and accept electrons between the alloy surface and the date palm seed inhibitor molecules is critical for adsorption effectiveness. The HOMO and LUMO result indicated that the carboxyl (COOH) group and C=C bond were the most active sites for the electron donation-acceptance type of interaction and most auxiliary to the adsorption process over the Fe surface.

Corrosion inhibition of some azole derivatives on carbon steel in hydrochloric acid solution

2014 ◽  
Vol 61 (5) ◽  
pp. 300-306 ◽  
Author(s):  
B.P. Markhali ◽  
R. Naderi ◽  
M. Sayebani ◽  
M. Mahdavian
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Organic Compounds ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Acid Corrosion ◽  
Molecular Structures ◽  
Inhibition Mechanism ◽  
Content Type

Purpose – The purpose of this paper is investigate the inhibition efficiency of three similar bi-cyclic organic compounds, namely, benzimidazole (BI), benzotriazole (BTAH) and benzothiazole (BTH) on carbon steel in 1 M hydrochloric acid (HCl) solution. Organic inhibitors are widely used to protect metals in acidic media. Among abundant suggestions for acid corrosion inhibitors, azole compounds have gained attention. Design/methodology/approach – The inhibition efficiency of the three organic compounds was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Findings – Superiorities of BTH and BTAH corrosion inhibitors were shown by EIS data and polarization curves. Moreover, the results revealed that BTAH and BTH can function as effective mixed-type adsorptive inhibitors, whereas no inhibition behavior was observed for BI. Both BTAH and BTH obeyed Longmuir adsorption isotherm. The results obtained from this isotherm showed that both inhibitors adsorbed on the specimen surface physically and chemically. The difference in inhibition efficiencies of BTAH, BTH and BI was related to the presence of nitrogen and sulfur hetero atoms on their molecular structures. Originality/value – This study evaluated inhibition efficiency of BI, BTAH and BTH using electrochemical methods. In addition, the study attempted to find inhibition mechanism of the inhibitors and to find modes of adsorption of the inhibitors, correlating effects of heteroatoms and inhibition efficiency.

Some Anionic Surfactants as Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid Solution

2018 ◽  
Vol 786 ◽  
pp. 134-148 ◽  
Author(s):  
Rania Assem ◽  
A.S. Fouda ◽  
A.A. Ibrahim ◽  
M. Saadawy
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Hydrochloric Acid Solution ◽  
Anionic Surfactants ◽  
Electrochemical Impedance ◽  
Charge Transfer Resistance ◽  
Polarization Data ◽  
Transfer Resistance ◽  
Carbon Steel Surface

The corrosion inhibition effect of some anionic surfactants (Diisononyl phthalate (A), N-oleyl-1, 3-propane –diamine (B), and Sodium lauryl sulphate (C)) on the corrosion of carbon steel in 1M hydrochloric acid solution were studied by chemical method (weight loss) and electrochemical methods (potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). From the results, it was clear that these surfactants are good inhibitors for corrosion of carbon steel in 1M HCl solution. Their inhibition depends mainly on their concentrations and temperature of solution. Polarization data revealed that these surfactants act as mixed type inhibitors. The surfactants adsorptions were found to follow Langmuir’s adsorption isotherm. The thermodynamic parameters of activation and adsorption were calculated and discussed. Adsorption of used surfactants led to a reduction in the double layer capacitance (Cdl) and an increase in the charge transfer resistance (Rct). All measurements used confirmed the adsorption of the surfactants used on carbon steel surface. Confirmation of these various independent techniques proved validity of the obtained data.

Adsorption Behavior and Corrosion Inhibition of 2-Benzothiazolethiol for Q235 Steel in Hydrochloric Acid Solution

2012 ◽  
Vol 212-213 ◽  
pp. 947-950
Author(s):  
Tao Wang ◽  
Xi Yang He ◽  
Xue Yang
Keyword(s):  
Hydrochloric Acid ◽  
Acid Solution ◽  
Hydrochloric Acid Solution ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Hydrochloric Acid Concentration ◽  
Adsorption Behaviour ◽  
Q235 Steel ◽  
Increase With Increase ◽  
Mixed Type Inhibitor

The weight loss measurements and potentiodynamic polarization techniques are used to assess the inhibitive and adsorption behaviour of 2-Benzothiazolethiol (BTT) for Q235 steel in hydrochloric acid solution. The inhibition efficiency is found to increase with increase in BTT concentration but decrease with rise in temperature and hydrochloric acid concentration. The results show that BTT acts as a good corrosion inhibitor in hydrochloric acid solution. Adsorption of BTT is found to obey Langmuir isotherm. Polarization curves indicate BTT is a mixed-type inhibitor.

scholarly journals Effect of Imidazole as Corrosion Inhibitor on Carbon Steel Weldment in District Heating Water

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4416
Author(s):  
Sang-Jin Ko ◽  
Seok-Ryul Choi ◽  
Min-Sung Hong ◽  
Woo-Cheol Kim ◽  
Jung-Gu Kim
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Photoelectron Spectroscopy ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
District Heating ◽  
Petrochemical Plant ◽  
Steel Weldment ◽  
Heating Water ◽  
Type Interaction

Many research studies have been conducted on the corrosion inhibition performance of imidazole in acidic environments such as in the piping of a petrochemical plant. However, there has been no study on the effect of imidazole in alkaline conditions such as a local district water heating environment. Therefore, in this study, the effect of imidazole as a corrosion inhibitor on carbon steel weldment was investigated in alkaline district heating water. Inhibition efficiency and electrochemical properties were investigated by potentiodynamic polarization test and electrochemical impedance spectroscopy. As the concentration of imidazole increased up to 500 ppm, inhibition efficiency increased up to 91.7%. At 1000 ppm, inhibition efficiency decreased. Atomic force microscopy showed that surface coverage of imidazole at 1000 ppm is lower than that of imidazole at 500 ppm. X-ray photoelectron spectroscopy showed that with 500 ppm of imidazole, the amount of pyrrole type interaction is 4.8 times larger than pyridine type interaction. At 1000 ppm of imidazole, the amount of pyridine type interaction is 3.49 times larger than pyrrole type interaction. Depending on the concentration of imidazole, the ratio of interaction between carbon steel and imidazole affected inhibition efficiency.

Electrochemical Investigation of Myclobutanil as Corrosion Inhibitor for Copper in Acid Medium

2014 ◽  
Vol 960-961 ◽  
pp. 229-233 ◽  
Author(s):  
Li Zheng ◽  
Ji Liu ◽  
Zhi Hua Tao ◽  
Wei He ◽  
Ding Jun Xiao ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Corrosion Inhibitor ◽  
Potentiodynamic Polarization ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Electrochemical Investigation ◽  
Eis Measurements ◽  
Good Agreement ◽  
Mixed Type Inhibitor

This paper is mainly to discuss that myclobutanil as corrosion inhibitor and its corrosion efficiency were evaluated via electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. The potentiodynamic polarization measurements showed that the inhibition efficiency increases sharply with the increasing of concentration of myclobutanil, and the highest inhibition efficiency of the myclobutanil reached 84.3% at 3.2×10-4 mol/L in 1 mol/L HCl. The result also indicated that myclobutanil belongs to the mixed type inhibitor. The results obtained from EIS measurements are in good agreement with that obtained from potentiodynamic polarization.

scholarly journals 3-Mercaptopropionic Acid as Corrosion Inhibitor for Carbon Steel in CO2 Aerated 1% NaCl Solution with Buffer Control-pH

Molekul ◽  
2018 ◽  
Vol 13 (2) ◽  
pp. 98
Author(s):  
Yayan Sunarya
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Adsorption Mechanism ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Surface Film ◽  
Nacl Solution ◽  
Mercaptopropionic Acid ◽  
Buffer Control ◽  
Percentage Inhibition Efficiency

In this research, 3-Mercaptopropionic acid (MPA) as corrosion inhibitor of carbon steel in CO2 aerated 1% NaCl solution with buffer pH adjustment has been studied by means of electrochemical impedance (EIS) and polarization (Tafel plot). MPA was found to be an effective carbon steel inhibitor. Percentage inhibition efficiency (IE %) calculated by both Tafel plot and EIS, ranged from 85% to 90%. MPA was found to affect the cathodic processes and act as cathodic-type inhibitors. Mechanism of inhibit corrosion by adsorption mechanism leads to the formation of a protective chemisorbed film on the metal surface film which suppresses the dissolution reaction and the hydrogen evolution reaction is activation controlled.

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