Investigation of the Inhibitive Effect of Hexatriethanolamine Derivatives on Corrosion of Carbon Steel Pipelines in 1M HCI

2013 ◽  
Vol 787 ◽  
pp. 216-221
Author(s):  
Omnia A.A. El-Shamy ◽  
Abdullah S. Al-Ayed
Keyword(s):  
Surface Tension ◽  
Carbon Steel ◽  
Critical Micelle Concentration ◽  
Surface Area ◽  
Corrosion Inhibition ◽  
Surface Activity ◽  
Inhibition Efficiency ◽  
Surface Excess ◽  
Corrosion Inhibition Efficiency ◽  
Minimum Surface Area

The corrosion inhibition efficiency of carbon steel pipelines in 1M HCl by the synthesized hexatriethyleneamine derivatives potensiodynamic polarization 30 oC. The results showed that all synthesized inhibitors were good inhibitors and their inhibition efficiencies were significantly increased with increasing concentration. The surface activity were calculated from its surface tension measurements including the critical micelle concentration (CMC), effectiveness of surfactant (π), maximum surface excess (Γmax) and the minimum surface area (Amin).

Effectiveness of some Nonionic Surfactants As Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid Solution

2013 ◽  
Vol 787 ◽  
pp. 211-215 ◽  
Author(s):  
Omnia A.A. El-Shamy
Keyword(s):  
Surface Tension ◽  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Critical Micelle Concentration ◽  
Corrosion Inhibitors ◽  
Nonionic Surfactants ◽  
Steel Corrosion ◽  
Surface Excess ◽  
Compound I ◽  
Minimum Surface Area

The corrosion inhibition characteristics of the synthesized (I, II and III) nonionic surfactants on carbon steel corrosion in 1 M acid chloride have been investigated at 30 oC by potensiodynamic polarization. The obtained results show that compound I has the best efficiency at concentration 0.08 mmol/L while compound III is the best inhibitor at higher concentrations. The surface parameters of each synthesized surfactant were calculated from its surface tension including the critical micelle concentration (CMC), effectiveness of surfactant (π), maximum surface excess (Γmax) and the minimum surface area (Amin).

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 Effect of CO2 Partial Pressure on the Corrosion Inhibition of N80 Carbon Steel by Gum Arabic in a CO2-Water Saline Environment for Shale Oil and Gas Industry

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4245
Author(s):  
Gaetano Palumbo ◽  
Kamila Kollbek ◽  
Roma Wirecka ◽  
Andrzej Bernasik ◽  
Marcin Górny
Keyword(s):  
Carbon Steel ◽  
Partial Pressure ◽  
Corrosion Inhibition ◽  
Photoelectron Spectroscopy ◽  
Inhibition Efficiency ◽  
Gum Arabic ◽  
Saline Environment ◽  
X Ray ◽  
Co2 Partial Pressure ◽  
Corrosion Inhibition Efficiency

The effect of CO2 partial pressure on the corrosion inhibition efficiency of gum arabic (GA) on the N80 carbon steel pipeline in a CO2-water saline environment was studied by using gravimetric and electrochemical measurements at different CO2 partial pressures (e.g., PCO2 = 1, 20 and 40 bar) and temperatures (e.g., 25 and 60 °C). The results showed that the inhibitor efficiency increased with an increase in inhibitor concentration and CO2 partial pressure. The corrosion inhibition efficiency was found to be 84.53% and 75.41% after 24 and 168 h of immersion at PCO2 = 40 bar, respectively. The surface was further evaluated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), grazing incidence X-ray diffraction (GIXRD), and X-ray photoelectron spectroscopy (XPS) measurements. The SEM-EDS and GIXRD measurements reveal that the surface of the metal was found to be strongly affected by the presence of the inhibitor and CO2 partial pressure. In the presence of GA, the protective layer on the metal surface becomes more compact with increasing the CO2 partial pressure. The XPS measurements provided direct evidence of the adsorption of GA molecules on the carbon steel surface and corroborated the gravimetric results.

scholarly journals New Aromatic Azo-Schiff as Carbon Steel Corrosion Inhibitor in 1 M H2SO4

2018 ◽  
Vol 34 (5) ◽  
pp. 2471-2476 ◽  
Author(s):  
Hamida Edan Salman ◽  
Asim A. Balakit ◽  
Ali Ahmed Abdulridha
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Steel Corrosion ◽  
Spectroscopic Techniques ◽  
Different Temperatures ◽  
Corrosion Inhibition Efficiency

A new aromatic Schiff base with azo linkage (AS) has been synthesized and characterized by FT-IR, 1H NMR and 13C NMR spectroscopic techniques. The new compound (AS) has been evaluated as carbon steel corrosion inhibitor at different concentrations (0.005, 0.01, 0.02, 0.04 and 0.08 mM) and different temperatures (303 – 333 K). The corrosion inhibition efficiency was studied by potentiodynamic polarization and weight loss measurements. The effects of concentration and temperature on the inhibition efficiency were studied by potentiodynamic polarization studies, the results showed that increasing concentration of AS increases the inhibition efficiency while increasing the temperature decreases it, the highest corrosion inhibition efficiency, 93.9% was recorded with 0.08 mM of AS at 313 K in 1 M H2SO4. Weight loss measurements showed that the inhibition efficiency reached 97.1% in the presence of AS (0.08 mM) at 313 K. The adsorption process was found to obey Langmuir isotherm, and the adsorption thermodynamic parameters were studied. Scanning electron microscope (SEM) was used to confirm the results.

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