scholarly journals Corrosion Inhibition of Mild-Steel in 0.5 M HCl using some prepared 1,2,3-Triazoles Derivatives

2019 ◽  
Vol 9 (4) ◽  
pp. 290-304 ◽  
Author(s):  
Hawraa Kareem Dhaif ◽  
Ekhlas Q . Jasim ◽  
Zena A. Muhajjar ◽  
Ashwaq A. Shanta
Keyword(s):  
Activation Energy ◽  
Weight Loss ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Langmuir Isotherm ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Temperature Impact ◽  
The Impact ◽  
Hcl Solution

The Weight loss was employed to investigate the impact of triazole on mild-steel dissolution in 0.5 M HCl solution. The inhibitor’s inhibition efficiency was seen to increase with concentration yielding (81.61%,82.61%,88.29%,91.64%,94.32%) of (T9, T8, T6, T4, T1) at concentration 1×10-4 M HCl, at a temperature of 25°C for 240 min. At a temperature range from 25–45°C, we studied the temperature impact on the corrosion behavior, wherein the results demonstrated decrease in inhibition efficiency with rising in temperature to achieve (61.7%, 52.26%, 63.1%, 72.11%, 75.77 %) of (T9, T8, T6, T4 and T1) at a concentration of 1×10-4 M, at a temperature 45°C for 240 min. A study was also performed regarding the impact of temperature on the corrosion rate in the presence and absence of triazole. The activation energy and Kinetic parameters were calculated and discussed. Polarization curves revealed that the studied inhibitors represent a mixed – type inhibitors. Adsorption of inhibitors was found to obey Langmuir isotherm and was isotherm physisorption type.

Inhibition Effect of N-Octyl-2-Pyrrolidonium Chloride on the Corrosion of Mild Steel in Acidic Medium

2013 ◽  
Vol 634-638 ◽  
pp. 651-654
Author(s):  
Zi Chong Zhuang ◽  
Bao Hua Huang ◽  
Jun Liu ◽  
Yu Jing Lu ◽  
Zhan Chang Pan ◽  
...  
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Acidic Medium ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Electrochemical Techniques ◽  
Inhibition Mechanism ◽  
Inhibition Effect ◽  
Hcl Solution ◽  
Mixed Type Inhibitor

A new ionic liquid, N-octyl-2-pyrrolidonium chloride (NOPC), were synthesized and evaluated as inhibitors for mild steel (Q235) corrosion in 1 mol/L HCl. The adsorption behavior and corrosion inhibition mechanism of NOPC for mild steel in HCl solution were investigated by using weight loss measurements, electrochemical techniques, and SEM. The inhibition efficiency increases with the increasing concentration of NOPC in 1 mol/L HCl and decreases as the temperature increases. The results indicate that NOPC is able to function as a mixed type inhibitor.

scholarly journals Corrosion Inhibition of Mild-Steel in (1M) HCl using Spands Reagent

2017 ◽  
Vol 13 (1) ◽  
pp. 5915-5922
Author(s):  
Ala' a. A. Hussain
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Temperature Effect ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Effect Of Temperature ◽  
Standing Time ◽  
Galvanostatic Polarization ◽  
Increasing Temperature ◽  
Hcl Solution

The effect of Spands Reagent on the dissolution of Mild-steel in  1M HCl  solution was studied using weight loss and galvanostatic polarization techniques. The inhibition efficiency of inhibitor increases with concentration to attain (75.26%) at concentration  1×10-2 M ,and standing time for 180 min at 25°C. Temperature effect on the corrosion behavior was studied at temperature range from 25-45°C, the results showed that inhibition efficiency decreased with increasing temperature to attain (64.53%) at concentration 1×10-2  M at 45°C and with standing time equal to 180 min. The effect of temperature on the rate of corrosion in the absence and presence of   Spands Reagent was also studied. The Kinetic Parameters were calculated and discussed. The polarization curves revealed that the studied inhibitor represent a mixed–type inhibitors. Adsorption of inhibitor was isotherm physisorption type.

scholarly journals ELECTROCHEMICAL STUDIES FOR CORROSION INHIBITION OF MILD STEEL BY CHRYSOPHYLLUM ALBIDUM EXTRACT

2018 ◽  
Vol 6 (1) ◽  
pp. 415-420
Author(s):  
Akoma Chigozie ◽  
Osarolube Eziaku ◽  
Abumere O. E.
Keyword(s):  
Corrosion Rate ◽  
Mild Steel ◽  
Current Density ◽  
Potentiodynamic Polarization ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Electrochemical Studies ◽  
Polarization Technique ◽  
Carbonated Drinks

The corrosion behavior of mild steel in carbonated drinks produced by Nigerian Breweries (Fanta, Sprite and Coke) was studied in the presence and absence of an eco-friendly inhibitor, Chrysophyllum albidum using Potentiodynamic polarization technique at 25 °C. Results showed that Chrysophyllum albidum reduced the current density (icorr), which in turn means that the corrosion rate was reduced significantly. The inhibition efficiency was found to be 93%, 78.6% and 87.5% for Fanta, Sprite and Coke respectively. The study also showed that Chrysophyllum albidum functioned as a mixed-type corrosion inhibitor in the three environments studied and therefore presents it as a long-term inhibitor for the corrosion of mild steel.

scholarly journals Investigating the Inhibitive Characteristics of Moringa Oleifera on the Corrosion of Mild Steel

2021 ◽  
Vol 9 (9) ◽  
pp. 595-602
Author(s):  
Okpaga D. M
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Immersion Time ◽  
Moringa Oleifera ◽  
Inhibition Efficiency ◽  
Sodium Hydroxide Solution ◽  
Total Surface Area ◽  
Corrosion Rates ◽  
Very High

Abstract: This work deals with the inhibitive characteristics of Moringa oleifera fruits and leaves extracts in Hydrochloric Acid solution and Sodium Hydroxide solution respectively on the corrosion of mild steel. This was carried out using weight loss and polarization techniques. The effects of immersion time, the effect of acid and alkaline concentration on the corrosion behavior of mild steel in 1.0M HCl and 1.0 NaOH with addiction of extracts were deduced. The fruits which were dried and grounded to powder of 10g and the leaves which range from 25cm3 to 100cm3 were used for this study. The corrosion rate was very high in the absence of inhibitors (Moringa oleifera fruits and the leaves extracts). The mild steel was cut into coupon averaging a total surface area of 4.262cm2 . The sample was weighed and immersed into a beaker containing 1.0M NaOH with different volumes of moringa leaves and 1.0M HCl with 10g dried concentrated powdered moringa fruits with coupons removed every 7 days for weight loss measurements till 4 weeks. The corrosion rates were found to be decreased by 83% in 1.0M HCl and 78% in 1.0M NaOH respectively, values of inhibition efficiency (ࣁ (%were calculated from weight loss. The results obtained showed that the Moringa oleifera fruits and leaves extracts could serve as effective inhibitors on the corrosion of mild steel in HCl and NaOH respectively. Keywords: Moringa oleifera, Corrosion rate, Weight loss, Mild steel, Inhibitor.

scholarly journals Anti-Corrosive Behavior of the Seed Extract of Amomum sabulatum

2021 ◽  
Vol 309 ◽  
pp. 01026
Author(s):  
Neha Daksh ◽  
Akhil Saxena ◽  
Jayahari Lade ◽  
Nakul Gupta
Keyword(s):  
Weight Loss ◽  
Electron Microscope ◽  
Corrosion Rate ◽  
Scanning Electron Microscope ◽  
Mild Steel ◽  
Plant Extract ◽  
Inhibition Efficiency ◽  
Protective Layer ◽  
Seed Extract ◽  
Scanning Electron

An aqueous extract of Amomum sabulatum seeds was evaluated for anticorrosive effects on mild steel in the presence of HCl. Weight loss measurements were taken to determine the corrosion rate and inhibition efficiency at various concentrations. With the increasing concentrations of plant extract, the results showed an improvement in inhibition efficiency and a decrease in corrosion rate. In the presence of 1500 ppm concentration of plant extract, it has an inhibition efficiency of 82.08 % at 303 K. The scanning electron microscope was used to examine the surface, which proves that while the extract was there, a protective layer formed on the metal surface.

scholarly journals Corrosion Inhibition Effect of 1,10-Phenanthroline-5,6-diamine on Mild Steel in Hydrochloric Acid Solution

2018 ◽  
Author(s):  
Ahmed A. Al-Amiery
Keyword(s):  
Weight Loss ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Mild Steel ◽  
Inhibition Efficiency ◽  
Inhibition Effect ◽  
Increase With Increase ◽  
Weight Loss Method ◽  
Loss Method ◽  
Hcl Solution

The inhibition impacts of 1,10-Phenanthroline-5,6-diamine (PTDA) on mild steel in 1 M HCl solution were investigated through weight loss method. The inhibition efficiencies of PTDA increase with increase in PTDA concentration at the temperature 303. Weight loss method indicate that PTDA is an excellent inhibitor the inhibition efficiency of 81.5% at the maximum PTDA concentration of 0.5 g/L at the temperature 303K.

Phenyl-3-(1-Aniline)-1-Propene Schiff Base on N80 Steel in 15% HCl Solution

2011 ◽  
Vol 239-242 ◽  
pp. 949-953 ◽  
Author(s):  
Xiao Jun Fang ◽  
Juantao Zhang ◽  
Chang Feng Chen ◽  
Zhen Quan Bai ◽  
Wei Hua Peng
Keyword(s):  
Weight Loss ◽  
Fourier Transform ◽  
Schiff Base ◽  
Chemical Structure ◽  
Mixed Type ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
N80 Steel ◽  
Hcl Solution

In this study, 1-phenyl-3-(1-aniline)-1-propene (PAP) was synthesized by aniline and Cinnamaldehyde, and its inhibitive effect on N80 steel in 15% HCl solution was investigated by using weight loss and electrochemical techniques (such as electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization). The chemical structure of PAP was confirmed by Fourier transform infrared spectroscopy (FTIR). The results were shown that, the inhibition efficiency of PAP could exceed 99%. Polarization measurements indicated that, the inhibitor acted as mixed type.

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.

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.

scholarly journals Effect of Temperature on the Corrosion Inhibition of Trans-4-Hydroxy-4′-Stilbazole on Mild Steel in HCl Solution

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Ayssar Nahlé ◽  
Ideisan I. Abu-Abdoun ◽  
Ibrahim Abdel-Rahman
Keyword(s):  
Weight Loss ◽  
Double Bond ◽  
Adsorption Isotherm ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Thermodynamic Parameters ◽  
The Other ◽  
Effect Of Temperature ◽  
Temkin Adsorption Isotherm ◽  
Hcl Solution

The inhibition and the effect of temperature and concentration of trans-4-hydroxy-4′-stilbazole on the corrosion of mild steel in 1 M HCl solution was investigated by weight loss experiments at temperatures ranging from 303 to 343 K. The studied inhibitor concentrations were between  M and  M. The percentage inhibition increased with the increase of the concentration of the inhibitor. The percentage inhibition reached about 94% at the concentration of  M and 303 K. On the other hand, the percentage inhibition decreased with the increase of temperature. Using the Temkin adsorption isotherm, the thermodynamic parameters for the adsorption of this inhibitor on the metal surface were calculated. Trans-4-hydroxy-4′-stilbazole was found to be a potential corrosion inhibitor since it contained not only nitrogen and oxygen, but also phenyl and pyridine rings that are joined together with a double bond (–C=C–) in conjugation with these rings.

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