Corrosion inhibition of carbon steel in 1 M H2SO4 using new Azo Schiff compound: Electrochemical, gravimetric, adsorption, surface and DFT studies

2020 ◽  
Vol 315 ◽  
pp. 113690 ◽  
Author(s):  
Ali Ahmed Abdulridha ◽  
Mahmood A. Albo Hay Allah ◽  
Sajjad Q. Makki ◽  
Yusuf Sert ◽  
Hamida Edan Salman ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Dft Studies ◽  
Adsorption Surface ◽  
Gravimetric Adsorption

Electrochemical and Density Functional Theory Studies of Alkyl Imidazoline on the Corrosion Inhibition of Carbon Steel in Sulfamic Acid Solutions

2020 ◽  
Vol 12 (6) ◽  
pp. 784-794
Author(s):  
Yitong Tan ◽  
Yaqiong Chen ◽  
Dong Yang ◽  
Xinxin Liu ◽  
Xinzhou Li ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Density Functional ◽  
Sulfamic Acid ◽  
Electrochemical Methods ◽  
Acid Solutions ◽  
Dft Studies ◽  
Functional Theory ◽  
Loss Of Weight

The corrosion inhibition effects of the 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazoline on simple steels were indagated in 8 wt.% NH2SO3H media using loss of weight and electrochemical methods in conjunction with adsorption and DFT researches. The anti-corrosion effect of UHCI acquired from EIS study is great and the maximum anti-corrosion efficiency could reach 90.15%. The sorption of UHCI on simple steel conforms to the Langmuir sorption equation. The DFT studies reveal that UHCI is firmly chemisorbed upon the simple steel by the Fe…O σ-type dative bonds and isolates the contact between simple steel and NH2SO3H, thus protecting simple steel from the corrosion of NH2SO3H.

Corrosion Inhibition by Self Assembling Monolayers on Carbon Steel

2015 ◽  
Vol 5 (2) ◽  
pp. 113-117
Author(s):  
Somasundaram Gowri ◽  
Jeganathan Sathiyabama ◽  
Susai Rajendran ◽  
Rajendran M. Joany ◽  
Jeyaparkash Jeyasundari ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Self Assembling

scholarly journals Combined Experimental and Theoretical Insights into the Corrosion Inhibition Activity on Carbon Steel Iron of Phosphonic Acids

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 135
Author(s):  
Aurelia Visa ◽  
Nicoleta Plesu ◽  
Bianca Maranescu ◽  
Gheorghe Ilia ◽  
Ana Borota ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Density Functional ◽  
Energy Gap ◽  
Electrochemical Impedance ◽  
Charge Transfer Resistance ◽  
Phosphonic Acids ◽  
Transfer Resistance ◽  
Potential Map ◽  
Chlorine Ions

The inhibition effect of N,N′-phosphonomethylglycine (PMG) and vinyl phosphonic acid (VPA) on the 3% NaCl acidic solution corrosion of carbon steel iron was studied at different immersion times by potentiodynamic polarization, electrochemical impedance spectroscopy, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, and computational methods. It is found from the polarization studies that PMG and VPA behave as mixed-type inhibitors in NaCl. Values of charge transfer resistance (Rct) and double layer capacitance (Cdl) in the absence and presence of inhibitors are determined. The PMG and VPA inhibitors were capable of inhibiting the corrosion process up to ≈91% and ≈85%, respectively. In the presence of PMG, the synergic effect of chlorine ions was observed. Density functional theory (DFT) was engaged to establish the adsorption site of PMG, VPA, and their deprotonated states. For studied compounds, the resulted values of ELUMO, EHOMO, energy gap (∆E), dipole moment (μ), electronic hardness (η), global softness (σ), electrophilic index (ω), and the electronic potential map are in concordance with the experimental data results regarding their corrosion inhibition behavior and adsorption on the metal surface.

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