scholarly journals Theoretical, thermodynamic and electrochemical analysis of biotin drug as an impending corrosion inhibitor for mild steel in 15% hydrochloric acid

2017 ◽  
Vol 4 (12) ◽  
pp. 170933 ◽  
Author(s):  
Xihua Xu ◽  
Ambrish Singh ◽  
Zhipeng Sun ◽  
K. R. Ansari ◽  
Yuanhua Lin
Keyword(s):  
Hydrochloric Acid ◽  
Mild Steel ◽  
Theoretical Data ◽  
Electrochemical Analysis ◽  
Chemical Calculation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Hydrophobic Nature ◽  
Temperature Activation ◽  
Electrochemical Microscopy

The corrosion mitigation efficiency of biotin drug for mild steel in 15% hydrochloric acid was thoroughly investigated by weight loss and electrochemical methods. The surface morphology was studied by the contact angle, scanning electrochemical microscopy, atomic force microscopy and scanning electron microscopy methods. Quantum chemical calculation and Fukui analysis were done to correlate the experimental and theoretical data. The influence of the concentration of inhibitor, immersion time, temperature, activation energy, enthalpy and entropy has been reported. The mitigation efficiency of biotin obtained by all methods was in good correlation with each other. Polarization studies revealed that biotin acted as a mixed inhibitor. The adsorption of biotin was found to obey the Langmuir adsorption isotherm. Surface studies showed the hydrophobic nature of the steel with inhibitor and vindicated the formation of a film on the metal surface that reduced the corrosion rate.

ELECTROCHEMICAL INVESTIGATION OF 2-THIOHYDANTOIN DERIVATIVES AS CORROSION INHIBITORS FOR MILD STEEL IN ACIDIC MEDIUM

2021 ◽  
Author(s):  
Petar Stanić ◽  
◽  
Nataša Vukićević ◽  
Vesna Cvetković ◽  
Miroslav Pavlović ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mild Steel ◽  
Acidic Medium ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Electrochemical Investigation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Hcl Solution ◽  
Scanning Electron

Four 2-thiohydantoin derivatives were synthesized and their corrosion inhibition properties on mild steel (MS) in 0.5M HCl solution was evaluated using usual gravimetric and electrochemical methods (weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS). Morphology of the metal surface was characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The study has shown that these compounds provide good protection for mild steel against corrosion in the acidic medium.

Engineered properties of polyurethane laden with beetroot and cerium oxide for cardiac patch application

2021 ◽  
pp. 152808372110542
Author(s):  
Saravana Kumar Jaganathan ◽  
Mohan Prasath Mani ◽  
Ahmad Fauzi bin Ismail ◽  
Ahmad Zahran Mohd Khudzari ◽  
Ahmad Athif Mohd Faudzi
Keyword(s):  
Cerium Oxide ◽  
Infrared Analysis ◽  
Hemolysis Assay ◽  
Force Microscopy ◽  
Patch Application ◽  
Atomic Force ◽  
Coagulation Study ◽  
Afm Analysis ◽  
Hydrophobic Nature ◽  
Cardiac Patch

The cardiac patch provides appropriate physicochemical properties and mechanical strength for the regeneration of damaged heart tissues. In this work, for the first-time, beetroot (BR) is blended with cerium oxide (CeO2) to produce nanofibrous polyurethane (PU) composite patch using electrospinning. The objective of this work is to fabricate the composite and examine its feasibility for cardiac patch applications. Morphological analysis revealed a dramatic reduction of fiber diameter of PU/BR (233 ± 175 nm) and PU/BR/CeO2 (331 ± 176 mm) compared to the pristine PU (994 ± 113 mm). Fourier transform infrared analysis (FTIR) analysis indicated functional peak intensities of the newly formed composite PU/BR and PU/BR/CeO2 were not similar to PU. The addition of beetroot rendered PU/BR hydrophilic (86° ± 2), whereas PU/BR/CeO2exhibited hydrophobic nature (99° ± 3). Atomic force microscopy (AFM) analysis depicted the reduced surface roughness of the PU/BR (312 ± 12 nm) and PU/BR/CeO2 (390 ± 125 nm) than the pristine PU (854 ± 32 nm). The incorporation of beetroot and CeO2 into PU enhanced the tensile strength compared with the pristine PU. The blood clotting time of PU/BR (APTT-204 ± 3 s and PT-103 ± 2 s) and PU/BR/CeO2 (APTT-205 ± 3 s and PT-105 ± 2s) were delayed significantly than the pristine PU(APTT-176 ± 2 s and PT-94 ± 2 s) as revealed in the coagulation study. Further, hemolysis assay showed the less toxic nature of the fabricated composites than the pristine PU. Hence, it can be inferred that the advanced physicochemical and blood compatible properties of electrospun PU/BR and PU/BR/CeO2 nanocomposite can be engineered successfully for cardiac patch applications.

scholarly journals Scanning Electrochemical Microscopy-Atomic Force Microscopy Probes from Pyrolyzed Parylene C

2013 ◽  
Vol 19 (S2) ◽  
pp. 46-47
Author(s):  
K.C. Morton ◽  
M.A. Derylo ◽  
A.E. Weber ◽  
L.A. Baker
Keyword(s):  
Atomic Force Microscopy ◽  
Scanning Electrochemical Microscopy ◽  
Parylene C ◽  
Force Microscopy ◽  
Atomic Force ◽  
Electrochemical Microscopy

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

Nanoscale mapping of catalytic hotspots on Fe, N-modified HOPG by scanning electrochemical microscopy-atomic force microscopy

Nanoscale ◽  
2018 ◽  
Vol 10 (15) ◽  
pp. 6962-6970 ◽  
Author(s):  
Srikanth Kolagatla ◽  
Palaniappan Subramanian ◽  
Alex Schechter
Keyword(s):  
Atomic Force Microscopy ◽  
Surface Modification ◽  
High Resolution ◽  
Scanning Electrochemical Microscopy ◽  
Graphitic Carbon ◽  
Force Microscopy ◽  
Atomic Force ◽  
Electrochemical Microscopy

The scanning electrochemical microscopy-atomic force microscopy (SECM-AFM) technique is used to map catalytic currents post Fe and N surface modification of graphitic carbon with an ultra-high resolution of 50 nm.

(Invited) Investigation of Corrosion Inhibitor Adsorption on Mild Steel By Electrochemical Atomic Force Microscopy

2020 ◽  
Vol MA2020-02 (12) ◽  
pp. 1273-1273
Author(s):  
Huiru Wang ◽  
Alain Pailleret ◽  
Bruce N Brown ◽  
Srdjan Nesic
Keyword(s):  
Atomic Force Microscopy ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Force Microscopy ◽  
Atomic Force
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