Enhancement of marine corrosion inhibition of mild steel by fabrication of environmental friendly CeO2 coating

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.

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Corrosion inhibition of mild steel in 1M HCl using environmentally benign Thevetia peruviana flower extracts

Sustainable Chemistry and Pharmacy ◽

10.1016/j.scp.2020.100354 ◽

2021 ◽

Vol 19 ◽

pp. 100354

Author(s):

Jiyaul Haque ◽

Chandrabhan Verma ◽

Vandana Srivastava ◽

W.B. Wan Nik

Keyword(s):

Mild Steel ◽

Corrosion Inhibition ◽

Environmentally Benign ◽

Thevetia Peruviana

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Synthesis, structural analysis and corrosion inhibition application of a new indazole derivative on mild steel surface in acidic media complemented with DFT and MD studies

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2021.126373 ◽

2021 ◽

Vol 617 ◽

pp. 126373

Author(s):

Mohammed Boulhaoua ◽

Mohamed El Hafi ◽

Saman Zehra ◽

Larbi Eddaif ◽

Awad A. Alrashdi ◽

...

Keyword(s):

Structural Analysis ◽

Mild Steel ◽

Corrosion Inhibition ◽

Steel Surface ◽

Acidic Media ◽

Mild Steel Surface

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Spilanthes acmella Leaves Extract for Corrosion Inhibition in Acid Medium

Coatings ◽

10.3390/coatings11010106 ◽

2021 ◽

Vol 11 (1) ◽

pp. 106

Author(s):

Akbar Ali Samsath Begum ◽

Raja Mohamed Abdul Vahith ◽

Vijay Kotra ◽

Mohammed Rafi Shaik ◽

Abdelatty Abdelgawad ◽

...

Keyword(s):

Mild Steel ◽

Corrosion Inhibition ◽

Active Sites ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Film Formation ◽

Protective Film ◽

Surface Protection ◽

Tafel Polarization ◽

Spilanthes Acmella

In the present study, the corrosion inhibition effect of Spilanthes acmella aqueous leaves extract (SA-LE) on mild steel was investigated in 1.0 M HCl solution at different temperature using weight loss, Tafel polarization, linear polarization resistance (LPR), and electrochemical impedance (EIS) measurements. Adsorption of inhibitor on the surface of the mild steel obeyed both Langmuir and Temkin adsorption isotherms. The thermodynamic and kinetic parameters were also calculated to determine the mechanism of corrosion inhibition. The inhibition efficiency was found to increase with an increase in the inhibitor concentration i.e., Spilanthes acmella aqueous leaves extract, however, the inhibition efficiency decreased with an increase in the temperature. The phytochemical constituents with functional groups including electronegative hetero atoms such as N, O, and S in the extract adsorbed on the metal surface are found responsible for the effective performance of the inhibitor, which was confirmed by Fourier-transform infrared spectroscopy (FT-IR) and ultraviolet–visible spectroscopic (UV-Vis) studies. Protective film formation against corrosion was confirmed by scanning electron microscopy (SEM), atomic force microscopy (AFM), and contact angle studies. The result shows that the leaves extract acts as corrosion inhibitor and is able to promote surface protection by blocking active sites on the metal.

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