scholarly journals Corrosion Inhibition of Carbon Steel using Dipropyl Sulphide as Inhibitor System in Sulphuric Acid Solution

2021 ◽  
Vol 33 (12) ◽  
pp. 3115-3122
Author(s):  
P. Vijayakumar ◽  
S. Valarselvan ◽  
S.S. Syed Abuthahir
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Sulphuric Acid ◽  
Surface Analysis ◽  
Corrosion Inhibition ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Protective Film ◽  
Carbon Steel Surface ◽  
Loss Method

The corrosion inhibition effect of dipropyl sulphide (DPS) on carbon steel immersed in 0.5 N sulphuric acid has been evaluated at room temperature using mass loss method. The corrosion rate and inhibition efficiency was obtained from weight loss method. The corrosion inhibition efficiency increases with increase in concentration of an inhibitor. The corrosion rate decreases when increase in concentration of inhibitor. This is due to the higher concentration of inhibitor solution, which blocks the active site of a carbon steel and a protective film is formed on the carbon steel surface. Electrochemical studies have been used to confirm the formation of protective film over the carbon steel surface. This is further confirmed by surface analysis technique like FTIR spectroscopy and scanning electron microscopy. Energy dispersive analysis of X-ray was used to analyze the elements present over the carbon steel surface. Surface analysis of polished, corroded and inhibitor carbon steel surface has been evaluated by SEM. In order to study adsorption of dipropyl sulphide on carbon steel, in situ atomic force microscopy (AFM) measurements were performed in control, with and without dipropyl sulphide in 0.5 N H2SO4 solution.

Electrochemical and XPS studies of alkyl imidazoline on the corrosion inhibition of carbon steel in citric acid solution

2016 ◽  
Vol 34 (5-6) ◽  
pp. 295-304 ◽  
Author(s):  
Dong Yang ◽  
Song Hui Liu ◽  
Yu Pei Shao ◽  
Shao Di Xu ◽  
Lu Lu Zhao ◽  
...  
Keyword(s):  
Citric Acid ◽  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Electrochemical Techniques ◽  
Acid Solutions ◽  
Xps Spectra ◽  
Carbon Steel Surface ◽  
Weight Loss Method ◽  
Loss Method

AbstractThe corrosion inhibition behavior of an imidazoline derivative, namely, 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazoline (UHCI) for carbon steel in 4 wt.% citric acid solutions was characterized by weight loss method and electrochemical techniques in conjunction with X-ray photoelectron spectrometer (XPS) technique. The inhibitor has a good anti-corrosion effect on the carbon steel in 4 wt.% citric acid solutions. The inhibition efficiency increases with UHCI concentrations from 0 up to 0.4 wt.%, yet declines a bit at 0.6 wt.% per contra with further augmentation of concentration. The inhibition efficiency declines with the rise of temperature from 20°C to 95°C, while it rises with the extension of soaking time from 2 h to 24 h. Two N1s peaks that appeared in XPS spectra give proof of UHCI inhibitor adsorbed on the carbon steel surface.

New Star Shape Tetra-Cationic Surfactant Synthesis and Evaluation as Corrosion Inhibitor for Carbon Steel in Different Acidic Media

2019 ◽  
Vol 233 (11) ◽  
pp. 1571-1601
Author(s):  
Elsayed A. El-Sharaky ◽  
Eman A. Khamis ◽  
Olfat E. El-Azabawy ◽  
Aziza S. El-Tabei
Keyword(s):  
Surface Tension ◽  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Cationic Surfactant ◽  
Steel Surface ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Electrochemical Measurements ◽  
Carbon Steel Surface ◽  
Corrosion Inhibition Efficiency

Abstract A new star shape tetra-cationic surfactant was synthesized to evaluate as corrosion inhibitors for carbon steel in different acid media. This surfactant prepared by the reaction of tris(2-(dimethylamino)ethyl) O,O′,O′′-(nitrilotris(ethane-2,1-diyl)) trimaleate with 1-bromododecane and abbreviated as STCS. The chemical structure of the prepared surfactant was confirmed by FT-IR, 13C and 1HNMR and elemental analysis. Their aggregation behavior in watery solution was explored by surface tension measurements. The surface tension of water was decreased nearly to 35 mN m−1 when adding the surfactant. This result demonstrates that the surfactant shows remarkable surface activity, due to the effect of the head groups. Corrosion inhibition efficiency of the surfactant on the carbon steel surface in 1 M hydrochloride acid and 1 M H2SO4 was evaluated using the electrochemical measurements. These measurements revealed that the synthesized surfactant act as effective mixed-type corrosion inhibitors. Their adsorption on a carbon steel surface was well described by the Langmuir adsorption isotherm. Corrosion inhibition efficiency was enhanced with increasing the concentration of inhibitor and increasing the temperatures. The results of the quantum chemical calculations and the electrochemical measurements were in good agreement.

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.

scholarly journals Synthesis of 1,2,3-Triazole Derivatives and Its Evaluation as Corrosion Inhibitors for Carbon Steel

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Gabriel O. Resende ◽  
Sara F. Teixeira ◽  
Igor F. Figueiredo ◽  
Alexandre A. Godoy ◽  
Dafne Júlia F. Lougon ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Heterocyclic Compounds ◽  
Steel Surface ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Chemical Interaction ◽  
Synthetic Route ◽  
Acid Media ◽  
Carbon Steel Surface ◽  
Physical And Chemical

Heterocyclic compounds containing the 1,2,3-triazole moiety can be synthesized through click-chemistry, which is rapid reactions with good yields allowing the synthesis of great derivatives diversity by making minor changes in the reagents. The products were obtained with good yields through a synthetic route which uses ready available nonexpensive commercial reagents and without any further purification of any product or intermediate. The carbon steel anticorrosive activity was tested through weight loss and electrochemical assays in acid media. It was observed relevant inhibition efficiency (> 90%) for inhibitors 1 and 2. From Langmuir isotherm, it was hypothesized the adsorption of inhibitors on the carbon steel surface might occur by physical and chemical interaction; however, the activation energy raised suggests a physisorption process for the interaction of the inhibitor on the carbon steel surface.

scholarly journals Evaluation of Inhibitive Performance of Acidic Extract of Eichornia Crassipeson Corrosion of Low Carbon Steel in 1M Sulphuric Acid Solution

2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Sidikat I Kuye ◽  
Emmanuel Amaechi ◽  
Nurudeen O Adekunle ◽  
Olayide R Adetunji ◽  
Alex F Adisa ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Acid Solution ◽  
Sulphuric Acid ◽  
Eichhornia Crassipes ◽  
Inhibition Efficiency ◽  
Low Carbon Steel ◽  
Gravimetric Method ◽  
Sulphuric Acid Solution ◽  
Low Carbon

Corrosion inhibition potential of Eichhornia crassipes extract on low carbon steel in 1 M sulphuric acid solution was investigated using gravimetric method and corrosion rate. The experiment was carried out for 3 hours at different concentration of Eichhornia crassipes extract and temperatures of 26.6°C, 40°C and 60°C. Arrhenius and improved Arrhenius equations were used to determine the thermodynamics properties of the reaction while the nature of the reaction was proposed by adsorption isotherms. The results showed that corrosion rate decreased in the presence of the extract except in 60oC. Inhibition efficiency also increased with extract concentration with the highest (82%) occurring at room temperature and 5% concentration. Inhibition efficiency decreased with increase in temperature with almost no inhibition at 60oC, this is associated with physisorption. Activation energy () and activation enthalpy () both had positive values and they increased in the presence of Eichhornia crassipes extract, those for inhibited solution were higher than those for uninhibited solution, these can also be attributed to physisorption. Inhibition  reaction obeyed Langmuir adsorption isotherm. Gibbs free energy () calculated for the reaction is -8.509 to -11.767 kJ mol-1.

scholarly journals Corrosion Characteristics of Carbon Steel upon Exposure to Biodiesel Synthesized from Used Frying Oil

REAKTOR ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 177
Author(s):  
Adhi Setiawan ◽  
Nora Amelia Novitrie ◽  
Agung Nugroho ◽  
W Widiyastuti
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Contact Time ◽  
Steel Surface ◽  
Steel Corrosion ◽  
Frying Oil ◽  
Effect Of Temperature ◽  
Used Frying Oil ◽  
Carbon Steel Surface ◽  
Rate Maximum

The use of biodiesel leads to corrosion of automotive material, which can potentially shorten engine lifetime. The study aims to investigate the effect of temperature and contact time on the corrosion characteristics of carbon steel upon exposure to biodiesel synthesized from used frying oil. The corrosion rate of carbon steel was analyzed based on weight loss measurement according to the standard of ASTM G31 as affected by temperature and contact time. The immersion temperatures used in this study were 30oC, 40oC, and 70o, respectively. The contact times studied were 30 days, 40 days, and 50 days respectively. The results show that the increase of temperature and contact time of biodiesel on carbon steel surface speeds up the corrosion rate. Maximum corrosion rate (0.083 mmy) was observed on the carbon steel contacted to biodiesel at 70oC for 50 days. The SEM results showed an irregular shape of the corroded carbon steel surface. XRD / FTIR analysis of carbon steel samples show the presence of peaks, detected as Fe2O3, FeO(OH) and Fe2O2CO3, as the corrosion products. Keywords: biodiesel; carbon steel; corrosion; FAME; used frying oil

SYNTHESIS OF CORROSION INHIBITORS WITH THE USE OF BANANA STEM EXTRACTS (MUSA ACUMINATA)

2020 ◽  
Vol 5 (2) ◽  
pp. 9-16
Author(s):  
K.F. Oyedeko ◽  
◽  
HEPHIZIBAH Olaniyi
Keyword(s):  
Carbon Steel ◽  
Steel Surface ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Low Carbon Steel ◽  
Musa Acuminata ◽  
Inhibition Mechanism ◽  
Low Carbon ◽  
Green Inhibitors ◽  
Carbon Steel Surface

Corrosion inhibitors are vital in industry for protection and prevention of surfaces from corrosion attack. There is need to have green inhibitors that are environmentally friendly and not hazardous to use. Extract from stem of banana (Musa species: Musa-Acuminata) was considered as green inhibitors. Extracts from the stem of banana was subjected to physico-chemical, phytochemical screening and corrosion test using gravimetric measurement with a low carbon steel flat bar coupon. The corrosion inhibition mechanism of the plant extract on the low carbon steel surface in 1M HCl and H2SO4 acid at different temperatures (30 to 60oC) showed that the inhibition efficiency (IE) increased with increase in concentration of the inhibitor (15ml to 75ml) but decreased with increase in temperature (303K to 333K) for the inhibitors throughout the test period, indicating a physisorption of extract on the carbon steel surface. The adsorption on the low carbon steel surface agrees with the Langmuir adsorption isotherm. The inhibition efficiency of the extract was above 50% in both media with banana extract having 69.55% inhibition efficiency in H2SO4 solution

Inhibition of Corrosion of Carbon Steel by Resorcinol-Zn2+ System in Well Water

2015 ◽  
Vol 1 (2) ◽  
Author(s):  
Benita Sherine ◽  
A. Jamal Abdul Nasser ◽  
S. Rajendran
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Inhibition Efficiency ◽  
Well Water ◽  
Protective Film ◽  
Zinc Ions ◽  
Immersion Period ◽  
Afm Analysis ◽  
Weight Loss Method ◽  
Loss Method

The inhibition efficiencies of inhibitor systems constituting various combinations of resorcinol and zinc ions in controlling corrosion of carbon steel immersed in well water have been evaluated by weight loss method. 75 ppm of zinc has 36% inhibition efficiency (Immersion period =7 days). When 100 ppm of resorcinol is added, the IE increases to 96%. The nature of the protective film formed on the metal surface has been analyzed by FTIR spectra, SEM and AFM analysis. The protective film is found to consist of Fe2+ - resorcinol complex and Zn(OH)2.

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