scholarly journals Anticorrosion Efficiency of Inhibitor Coatings Based on Ammonium Cation with Different Substituents: The Influence of Wettability and Molecular Structure

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1512
Author(s):  
Hanna Pianka ◽  
Sana Falah ◽  
Sandrine Zanna ◽  
Vladimir Bezborodov ◽  
Sergei Mikhalyonok ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Inhibition Efficiency ◽  
Critical Micellar Concentration ◽  
Inhibition Effect ◽  
Synergistic Inhibition ◽  
Wetting Properties ◽  
Polarization Technique ◽  
Synergistic Inhibition Effect ◽  
The Relationship ◽  
Anticorrosion Properties

In this work, different cationic surfactants with various aliphatic and aromatic ammonium cations were used to prepare inhibitor coatings and were characterized by different techniques such as IR spectroscopy and NMR. The inhibitor coatings were prepared by electrografting on the steel surface and their anticorrosion properties were evaluated in different media (HCl, H2SO4 and NaCl solutions). The electrochemical potentiodynamic polarization technique was used to study the inhibition efficiency of the prepared coatings. The dependence of the wetting properties of the electrografted layer and its homogeneity on the molecular structure of the prepared surfactants was studied. Particular attention was paid to the relationship between the properties of these surfactants in terms of critical micellar concentration, packing and wetting, and the anti-corrosion efficiency of their coatings. In this paper, we discuss the synergistic inhibition effect and the anticorrosion efficiency.

SYNERGISM OF RARE EARTH Ce(III) ION WITH CYSTEINE AGAINST CORROSION OF P110 CARBON STEEL IN 3% NaCl SOLUTIONS

2017 ◽  
Vol 24 (02) ◽  
pp. 1750024 ◽  
Author(s):  
XIA LIU ◽  
JIANSHU YANG ◽  
YONGPING LIU ◽  
XIANGYUN JI ◽  
YING LU ◽  
...  
Keyword(s):  
Rare Earth ◽  
Carbon Steel ◽  
Inhibition Efficiency ◽  
Inhibition Effect ◽  
Synergistic Inhibition ◽  
Potentiodynamic Polarization Curves ◽  
Ir Reflection ◽  
Ir Reflection Spectra ◽  
Corrosion Inhibition Efficiency ◽  
Synergistic Inhibition Effect

The synergism of CeCl3 (Ce) with cysteine (Cys) on the corrosion of P110 carbon steel in 3% NaCl solutions was investigated by electrochemical methods and surface analysis. The results showed that CeCl3 and cysteine do little to inhibit the corrosion of carbon steel, but the combination of CeCl3 with cysteine has obvious synergistic effect on the corrosion of carbon steel and the corrosion inhibition efficiency was improved significantly. The potentiodynamic polarization curves indicated that the mixture of CeCl3 and cysteine acts as a cathodic inhibitor. Scanning electron microscope (SEM) and Infrared (IR) reflection spectra showed the synergistic inhibition effect was formed by the complexes between rare earth Ce(III) ion and amino acid.

scholarly journals Synergistic Inhibition Effect Between Capsella bursa-pastoris Extracts and Iodide Ions for Q235 Mild Steel in 1 M HCl Solution

2014 ◽  
Vol 8 (1) ◽  
pp. 31-38
Author(s):  
Qin Hu ◽  
Yubing Qiu ◽  
Guoan Zhang ◽  
Xingpeng Guo
Keyword(s):  
Mild Steel ◽  
Inhibition Efficiency ◽  
Iodide Ions ◽  
Inhibition Effect ◽  
Synergistic Inhibition ◽  
Adsorption Processes ◽  
Higher Temperature ◽  
Lower Temperature ◽  
Synergistic Inhibition Effect ◽  
Hcl Solution

The inhibition effect of Capsella bursa-pastoris extracts (CBE) and its synergistic effect with KI (CBEK) for Q235 mild steel in 1 M HCl solution were studied by electrochemical measurements. Both CBE and CBEK can serve as eco-friendly, mixed-type inhibitors, and the inhibition efficiency increases with the concentration and temperature. The synergistic parameter (SI) indicates a cooperative mechanism between the iodide anions and CBE molecules at lower temperature. The associated thermodynamic and kinetic data suggest the presence of CBEK on metal surface mainly through chemisorption at higher temperature. The adsorption processes follow Langmuir isotherm.

Synergistic inhibition effect on methane/air explosions by N2-twin-fluid water mist containing sodium chloride additive

Fuel ◽  
2019 ◽  
Vol 253 ◽  
pp. 361-368 ◽  
Author(s):  
Bei Pei ◽  
Jie Li ◽  
Yan Wang ◽  
Xiaoping Wen ◽  
Minggao Yu ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Water Mist ◽  
Inhibition Effect ◽  
Synergistic Inhibition ◽  
Synergistic Inhibition Effect

The synergistic inhibition effect between imidazoline and the oxide film on L360 steel in CO2/H2S systems

2015 ◽  
Vol 62 (3) ◽  
pp. 143-148 ◽  
Author(s):  
Guohao Chen ◽  
Lingyun Li ◽  
Jian Ouyang ◽  
Zhuoyan Zhu ◽  
Feng Wang ◽  
...  
Keyword(s):  
Oxide Film ◽  
Electrochemical Impedance ◽  
Pipeline Steel ◽  
X Ray Diffraction ◽  
Gas Field ◽  
Content Type ◽  
Inhibition Effect ◽  
Synergistic Inhibition ◽  
Inhibition Performance ◽  
Synergistic Inhibition Effect

Purpose – The aim of the present paper was to investigate the inhibition performance of the OF and/or IM on L360 steel in CO2/H2S environments. The pipeline steel surface usually has been pre-treated before using in the oil/gas field, such as by passivation, blackening, and phosphiding. The effectiveness of inhibition can vary because there are many differences between the metal matrix and the treated film. Design/methodology/approach – Imidazoline (IM) was synthesized by using oleic acid and diethylenetriamine, and its composition was verified using Fourier transform infrared spectroscopy. The oxide film (OF) covering a sample of L360 steel was characterized using X-ray diffraction, and its surface morphology was observed using scanning electron microscope. Electrochemical impedance spectroscopy measurements were conducted to study the inhibition performance of IM- and/or OF-covered L360 steel in the CO2/H2S environments. Findings – The results show that IM and OF can prevent corrosion on L360 steel in CO2/H2S environments, and the synergistic inhibition effect of IM and OF was very evident. A possible model is proposed to explain the synergistic inhibition effect in the CO2/H2S environments of IM and OF on L360 steel. Originality/value – Few reports have concerned the effect of the OF on the inhibitor’s performance, especially in CO2/H2S systems. The aim of the present study was to investigate the inhibition performance of the OF and/or IM on L360 steel in CO2/H2S environments. A model is proposed to explain the synergistic inhibition effect mechanism between IM and OF.

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