scholarly journals Experimental study and mathematical modelling of the corrosi-on inhibition of mild steel with an organic compound in 1 M HCl

2021 ◽  
Author(s):  
Wafia Boukhedena ◽  
Samir Deghboudj
Keyword(s):  
Organic Compound ◽  
Mild Steel ◽  
Mathematical Models ◽  
Inhibition Efficiency ◽  
Quadratic Model ◽  
Inhibitor Concentration ◽  
Microscopy Technique ◽  
The Family ◽  
Ketene Dithioacetal ◽  
Good Agreement

In this paper, synthesized organic compound of the family of ketene dithioacetal was studied as corrosion inhibitors for mild steel in 1.0 M hydrochloric acid by gravimetric measurement. The aim of this work is to study the effect of inhibitor concentration and the temperature on the resistance, corrosion and to compare the experimental results with mathematical models. The structural properties were performed using scanning electron microscopy technique. It has been found that the inhibition efficiency, increases with increasing inhibitor concentration. The adsorption of studied compounds on mild steel surface follows Langmuir’s isotherm. Obtained data were analyzed by suggesting two mathematical models based on linear and quadratic regression, taking into account the influence of concentration and temperature on the inhibition efficiency. Obtained experimental data were in good agreement with those predicated by the quadratic model

scholarly journals Effect of Terminalia catappa Leaves Extract on Corrosion of Mild Steel using Response Surface Methodology

2020 ◽  
Vol 27 (2) ◽  
pp. 47-56
Author(s):  
A.O. Okewale ◽  
O.A. Adesina ◽  
B.H. Akpeji
Keyword(s):  
Response Surface Methodology ◽  
Mild Steel ◽  
Response Surface ◽  
Inhibition Efficiency ◽  
Desirability Function ◽  
Inhibitory Effect ◽  
Quadratic Model ◽  
Box Behnken Design ◽  
Terminalia Catappa ◽  
Maximum Inhibition

Effect of Terminalia catappa leaves (TCL) extract in inhibiting corrosion of mild steel was investigated. In order to obtain the maximum inhibition efficiency, optimization of the process variables affecting corrosion of mild steel was carried out using the Box – Behnken Design plan and desirability function of Response Surface Methodology (RSM). The three parameters - varied include; TCL concentration (inhibitor), immersion time, and temperature and there effects in corrosion inhibition were established. The optimum conditions predicted from the quadratic model were inhibitor’s concentratrion (0.39 g/l), exposure time (8.68 hours), and temperature (36.06 oC) with the inhibition efficiency of 91.95 %. The data fitted well to the quadratic model which was validated. Adsorption of the extract’s component on the mild steel was responsible for the inhibitory effect of the TCL extract.The results showed that 97.92% of the total variation in the inhibition efficiency of TCL can be connected to the variables studied. Keywords: Mild steel, acid, Terminalia catappa, Corrosion, Response surface methodology (RSM).

scholarly journals Study of Corrosion Behavior of N’-(2-(2-oxomethylpyrrol-1-yl)ethyl)piperidine for Mild Steel in the Acid Environment

2021 ◽  
Vol 12 (3) ◽  
pp. 3638-3646
Keyword(s):  
Electron Microscopy ◽  
Mild Steel ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Protective Layer ◽  
Solution Temperature ◽  
Inhibitor Concentration ◽  
Acid Environment ◽  
Experimental Findings ◽  
Scanning Electron

The corrosion inhibition of mild steel in 1 M hydrochloric acid solution by N'-(2-(2-oxomethylpyrrol-1-yl)ethyl)piperidine (N-OPEP) was studied employing weight loss techniques. The experimental findings revealed that N-OPEP is the most excellent corrosion inhibitor, and the inhibitory performance increases with an increase in the inhibitor concentration. Furthermore, the inhibition efficiency decreases with an increase in the solution Temperature. The adsorption of inhibitor molecules on a mild steel surface followed Langmuir’s isotherm model and was found to be spontaneous. Scanning electron microscopy (SEM) photographs approved the formation of a protective layer of the inhibitor molecules on the surface of mild steel.

scholarly journals Effect of Schiff's Bases as Corrosion Inhibitors on Mild Steel in Sulphuric Acid

2007 ◽  
Vol 4 (3) ◽  
pp. 408-414 ◽  
Author(s):  
R. K. Upadhyay ◽  
S. P. Mathur
Keyword(s):  
Mild Steel ◽  
Sulphuric Acid ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Inhibitory Effect ◽  
Acid Solutions ◽  
Schiff’S Bases ◽  
Schiff's Bases ◽  
Maximum Inhibition ◽  
Good Agreement

Mass loss and thermometric methods have been used to study the corrosion inhibitory effect of synthesised Schiff's basesviz.N-(furfurilidine) – 4- methoxy aniline (SB1),N-(furfurilidine) – 4- methylaniline (SB2),N-(salicylidine) – 4- methoxy aniline (SB3),N-(cinnamalidine) – 4 –methoxy aniline (SB4) andN-(cinnamalidine) - 2-methylaniline (SB5) on mild steel in sulphuric acid solutions. Results show that both methods have good agreement with each other and inhibition efficiency depends upon the concentration of inhibitor as well as that of acid. Maximum inhibition efficiency is shown at highest concentration of Schiff's bases at the highest strength of acid.

SELECTED BIS-THIADIAZOLE: SYNTHESIS AND CORROSION INHIBITION STUDIES ON MILD STEEL IN HCL ENVIRONMENT

2020 ◽  
Vol 27 (12) ◽  
pp. 2050014
Author(s):  
ABBAS Z. SALMAN ◽  
QUSAY A. JAWAD ◽  
KHALID S. RIDAH ◽  
LINA M. SHAKER ◽  
AHMED A. AL-AMIERY
Keyword(s):  
Mild Steel ◽  
Immersion Time ◽  
Inhibition Efficiency ◽  
Langmuir Adsorption Isotherm ◽  
Inhibitor Concentration ◽  
Conjugation System ◽  
Inhibition Effect ◽  
Langmuir Adsorption ◽  
Acid Environment ◽  
Inhibition Studies

The inhibition effect of synthesized corrosion inhibitor namely 5,5′-(1,4-phenylene)bis([Formula: see text]-phenyl-1,3,4-thiadiazol-2-amine) (PBPA) on the corrosion of mild steel in 1-M hydrochloric acid environment are examined by gravimetric techniques at various temperature (303–343 K). The synthesized inhibitor concentrations are 0.1–0.5[Formula: see text]mM. The inhibition efficiency increased with the increase of the inhibitor concentration. The inhibition efficiency reached 94% at the highest studied concentration of 0.5[Formula: see text]mM for 5[Formula: see text]h of immersion time and 303[Formula: see text]K. Moreover, the inhibition efficiency decreased with the temperature increase. The adsorption of tested inhibitor molecules on the surface of mild steel follows the Langmuir adsorption isotherm. The studied inhibitor molecules showed excellent inhibition since PBPA molecules have nitrogen and sulfur atoms in addition to phenyl and thiadiazol rings which were linked together in conjugation system.

scholarly journals Synergistic effect on inhibiton efficiency of coconut husk fibre essence in controlling corrosion of mild steel in neutral medium

2015 ◽  
Vol 49 (3) ◽  
pp. 185-188
Author(s):  
A Sankar ◽  
S Ananth Kumar ◽  
S Rameshkumar
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Neutral Medium ◽  
Well Water ◽  
Inhibitor Concentration ◽  
Coconut Husk ◽  
Tank Water

The corrosion inhibition nature of coconut husk essence for the corrosion of mild steel in tank water (neutral medium) was investigated using weight loss, electrochemical impedance and Potentiodynamic Polarization methods. The results revealed that coconut husk essence acts as a corrosion inhibitor in well water. The inhibition efficiency increased with an increase in inhibitor concentration. The inhibition is attributed to adsorption of the inhibitor on the steel surface. DOI: http://dx.doi.org/10.3329/bjsir.v49i3.22133 Bangladesh J. Sci. Ind. Res. 49(3), 185-188, 2014

scholarly journals Synthesis New Pyridinium Salts as Corrosion Inhibitors for Mild Steel in 1 M H2SO4

2021 ◽  
Vol 24 (2) ◽  
pp. 14-20
Author(s):  
Rania Kareem Hameed ◽  
◽  
Mehdi Salih Shihab ◽  
Keyword(s):  
Weight Loss ◽  
Free Energy ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Organic Molecules ◽  
Inhibition Efficiency ◽  
Pyridinium Salts ◽  
Inhibitor Concentration ◽  
Pyridinium Bromide

Some new pyridinium salts, namely 4-(4-Chloro-benzylidene-hydrazinocarbonyl)-1-phenyl-pyridinium bromide, C1; 4-(4-Chloro-benzylidene-hydrazinocarbonyl)-1-butyl-pyridinium bromide, C2; 4-(4-Chloro-benzylidene-hydrazinocarbonyl)-1-phencyl-pyridinium bromide, C3; were synthesized and Corrosion inhibitors for mild steel were tested in a 1M H2SO4aqueous solution at 20ºC for 24 hours using weight loss measurements. The findings revealed that the inhibition efficiency of all pyridinium bromide derivatives converges at the maximum concentration. An increase in inhibitor concentration is associated with a decrease in corrosion rate, an increase in inhibition efficiencies, and an increase in surface degree of coverage. The physisorption effects for (C1, C2, and C3) were revealed by the free energy values of adsorption, which provided useful information for predicting the interaction between the metal surface and organic molecules as corrosion inhibitors.

scholarly journals Corrosion inhibition of mild steel using novel pyridine derivative in 1 M hydrochloric acid

2020 ◽  
Vol 64 (2) ◽  
pp. 59-64 ◽  
Author(s):  
A.A. Al-Amiery ◽  
L.M. Shaker
Keyword(s):  
Hydrochloric Acid ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Protective Layer ◽  
Pyridine Derivative ◽  
Inhibitor Concentration ◽  
Langmuir Adsorption ◽  
Mechanism Of Inhibition ◽  
Acid Environment

AbstractA novel pyridine derivative was synthesized, and its corrosion inhibition effects on mild steel in a 1M hydrochloric acid environment were investigated by gravimetric techniques, The results demonstrated that the inhibitive performance increased with the increasing of inhibitor concentration. At 303, the inhibition efficiency of pyridine derivative 4-hydroxy-3-(pyridin-2-ylaminomethyl)toluene accomplished 96.2% at the inhibitor concentration of 0.005 M. The mechanism of inhibition implicated the forming of a protective layer from inhibitor molecules on the surface of mild steel by a Langmuir adsorption isotherm. The presence of nitrogen and oxygen atoms in the structure of 4-hydroxy-3-(pyridin-2-ylaminomethyl)toluene confirmed by CHN-analysis revealed the adsorption of inhibitor molecules on the surface of mild steel surface.

scholarly journals Inhibition behaviour of mild steel by three new benzaldehyde thiosemicarbazone derivatives in 0.5 M H 2 SO 4 : experimental and computational study

2019 ◽  
Vol 6 (8) ◽  
pp. 190192
Author(s):  
H. H. Zhang ◽  
C. K. Qin ◽  
Y. Chen ◽  
Z. Zhang
Keyword(s):  
Mild Steel ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Computational Study ◽  
Theoretical Calculations ◽  
Steel Corrosion ◽  
Langmuir Adsorption ◽  
Mild Steel Corrosion ◽  
Benzaldehyde Thiosemicarbazone ◽  
Good Agreement

Three new benzaldehyde thiosemicarbazone derivatives namely benzaldehyde thiosemicarbazone (BST), 4-carboxyl benzaldehyde thiosemicarbazone (PBST) and 2-carboxyl benzaldehyde thiosemicarbazone (OCT) were synthesized and their inhibition effects on mild steel corrosion in 0.5 M H 2 SO 4 solution were studied systematically using gravimetric and electrochemical measurements. Weight loss results revealed that PBST exhibited the highest inhibition efficiency of 96.6% among the investigated compounds when the concentration was 300 µM. The analysis of polarization curves indicated that the three benzaldehyde thiosemicarbazone derivatives acted as mixed type inhibitors and PBST and OCT predominantly anodic. The adsorption process of all these benzaldehyde thiosemicarbazone derivatives on Q235 steel surface in 0.5 M H 2 SO 4 solution conformed to Langmuir adsorption isotherm. Scanning electron microscopy was conducted to show the presence of benzaldehyde thiosemicarbazone derivatives on Q235 mild steel surface. The results of theoretical calculations were in good agreement with that of experimental measurements.

scholarly journals Corrosion Inhibition of Mild Steel in Nitric Acid Media by some Schiff Bases Derived from Anisalidine

2013 ◽  
Vol 15 (1) ◽  
pp. 61-67 ◽  
Author(s):  
N. Saxena ◽  
S. Kumar ◽  
M.K. Sharma ◽  
S.P. Mathur
Keyword(s):  
Nitric Acid ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Schiff Bases ◽  
Inhibition Efficiency ◽  
Acid Strength ◽  
Inhibitor Concentration ◽  
Acid Media ◽  
Polarization Technique ◽  
Inhibition Performance

Corrosion inhibition performance of mild steel in nitric acid solution containing different concentration of anisalidine derivative Schiff bases viz. N- (4-nitro phenyl) p-anisalidine (SB1), N- (4-chloro phenyl) p-anisalidine (SB2), N- (4-phenyl) p-anisalidine (SB3), N- (4-methoxy phenyl) p-anisalidine (SB4), N- (4-hydroxy phenyl) p-anisalidine (SB5) has been investigated using mass loss, thermometric and potentiostate polarization technique. Inhibition efficiencies of Schiff bases have been evaluated at different acid strength. The inhibition efficiency was found larger than their parent amines. Inhibition efficiencies of synthesized Schiff bases increase with inhibitor concentration. Inhibition efficiency increases up to 98.32% with ansalidine derivative Schiff base.

Adsorption and corrosion inhibition characteristics of two medicinal molecules

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Hydrochloric Acid ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Half Life ◽  
Thermodynamic Data ◽  
Inhibition Efficiency ◽  
Gravimetric Method ◽  
Corrosive Environment ◽  
Corrosion Inhibition Efficiency

The corrosion inhibition characteristics of two medicinal molecules phenylalanine and rutin on mild steel in 1.0M Hydrochloric acid were evaluated using gravimetric method. Corrosion inhibition efficiency of 83.78 and 90.40 % was obtained respectively after seven days. However, phenylalanine showed weak accumulative higher corrosion inhibition efficiency. The presence of both molecules in the corrosive environment reduced the corrosion rate constant and increased the material half-life. Thermodynamic data calculated suggests a spontaneous adsorption of the molecules on the mild steel’s surface.

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