scholarly journals Evaluation of Antioxidant and Anticorrosive Activities of Ceriops tagal Plant Extract

2021 ◽  
Vol 11 (21) ◽  
pp. 10150
Author(s):  
Md Shamsuzzaman ◽  
Kathirvel Kalaiselvi ◽  
Mayakrishnan Prabakaran
Keyword(s):  
Mild Steel ◽  
Antioxidant Property ◽  
Antimicrobial Activities ◽  
Total Phenolic ◽  
Protective Film ◽  
Mangrove Plant ◽  
Force Microscopy ◽  
Steel Making ◽  
Atomic Force ◽  
Ceriops Tagal

Mangroves are plants known for their various medicinal and economical values, and therefore are widely investigated for their phytochemical, antioxidant, antidiarrheal, and antimicrobial activities. In the present study, we analyze the antioxidant and anticorrosive properties of Ceriops tagal (C. tagal), a tropical and subtropical mangrove plant of the Rhizophoraceae family. The total phenolic content (TPC) and total flavonoid content (TFC) were found to be 101.52 and 35.71 mg/g, respectively. The extract (100 µg/mL) exhibited 83.88, 85, and 87% antioxidant property against 1,1-diphenyl-2-picrylhydrazyl (DPPH), nitric oxide, and hydrogen peroxide free radicals. In addition, 600 ppm of C. tagal extract showed 95% corrosion inhibition against 1 M HCl attack on mild steel at 303 ± 1 K, which declined over other concentrations and temperatures, where AAS produced 82% inhibition at 600 ppm. UV-visible spectroscopy analysis revealed the formation of an inhibitor metal complex. The elemental analysis provided the presence of 84.21, 9.01, and 6.37% of Fe, O, and C, respectively, in inhibited mild steel, whereas the same were 71.54, 22.1, and 4.34%, respectively, in uninhibited specimen, stressing the presence of protective film on the metal surface. Scanning electron microscopy (SEM) also showed some noteworthy changes in both uninhibited and inhibited mild steel, making C. tagal plant a better alternative than any other synthetic inhibitors. Further, the atomic force microscopy (AFM) surface topography analysis showed that 600 ppm of C. tagal extract significantly diminished corrosion on the surface of mild steel.

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.

(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

ELECTROCHEMICAL, DFT AND MD SIMULATION INVESTIGATIONS OF THE CORROSION INHIBITION PROPERTIES OF HETEROCYCLIC SULFIDE DERIVATIVES FOR MILD STEEL IN ACIDIC MEDIUM

2019 ◽  
Vol 27 (06) ◽  
pp. 1950165
Author(s):  
IMENE BENMAHAMMED ◽  
TAHAR DOUADI ◽  
SAIFI ISSAADI ◽  
DJAMEL DAOUD ◽  
SALAH CHAFAA
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Density Functional ◽  
Md Simulation ◽  
Electrochemical Impedance ◽  
Dft Method ◽  
Molecular Structures ◽  
Force Microscopy ◽  
Atomic Force ◽  
The Density Functional Theory

The study of the corrosion inhibition of mild steel in acid medium 1 M HCl by the Schiff base compounds named {4,4′-Bis(pyrrole-2-carboxaldehyde) diphenyl diimino sulfide (L1) and 4,4′-Bis(thiophene-2-carboxaldehyde) diphenyl diimino sulfide (L2)} was carried out using various techniques: weight loss measurements, polarization curves, electrochemical impedance spectroscopy (EIS), atomic force microscopy (AFM), Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The influence of the concentration, immersion time and temperature was examined and the mode of adsorption of these inhibitors on the surface of the metal was highlighted by assigning the appropriate isotherm. The experimental results indicate that these compounds are effective corrosion inhibitors and the inhibitory competence rises with increasing inhibitor concentration. The adsorption of these compounds on the mild steel surface obeys the isotherm of Langmuir. The correlation between the molecular structures and the inhibitory properties of the compounds studied was performed using the Density Functional Theory (DFT) method. Furthermore, molecular dynamics (MD) simulation has been taken into account. The results indicate that the adsorption energy of L1 was less than L2, which is in accordance with the experimentally determined inhibition effect.

Friction Stir Processing of Mild Steel to Enhance its Surface Hardness

2012 ◽  
Vol 620 ◽  
pp. 117-121 ◽  
Author(s):  
Harpreet S. Grewal ◽  
Harpreet Singh ◽  
Anupam Agrawal ◽  
Harpreet S. Arora
Keyword(s):  
Mild Steel ◽  
Friction Stir Processing ◽  
Surface Hardness ◽  
Processing Technique ◽  
Structural Refinement ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Friction Stir ◽  
Size Refinement ◽  
Atomic Force

Friction stir processing (FSP) is a material processing technique recognized to enhance the mechanical properties of the material owing to micro-structural refinement. In the present study, the feasibility of the use of FSP for processing of mild steel has been explored. Using FSP, the micro-structural refinement of the steel surface was obtained, resulting in an average grain sizes of the order of 100 nm as confirmed by atomic force microscopy (AFM). Along with grain size refinement, an evolution of various phases was also studied with the help of X-ray diffraction (XRD). It was observed that ferrite was the only phase present in both processed and unprocessed steel.FSP was found to be useful to enhance the micro-hardness of the steel by 50 to 80%, in comparison with that of the un-processed steel.

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.

scholarly journals 1-Hydroxy Ethylidene 1,1-Diphosphonic Acid (HEDP) as a Corrosion Inhibitor for Aluminium

2016 ◽  
Vol 8 (1) ◽  
pp. 1479-1490
Author(s):  
M. Hakeem ◽  
S. Rajendran ◽  
Peter Pascal Regis
Keyword(s):  
Aqueous Solution ◽  
Corrosion Inhibitor ◽  
Electrochemical Techniques ◽  
Film Surface ◽  
Analytical Techniques ◽  
Protective Film ◽  
Diphosphonic Acid ◽  
Force Microscopy ◽  
Atomic Force ◽  
Polarization Study

The present study is to use 1-hydroxy ethylidene 1, 1-diphosphonic acid (HEDP) as corrosion inhibitor for aluminium in aqueous solution containing 60 ppm Cl- ion was chosen as the inhibitor. Zn2+ is selected as the synergist, as Zn2+ ions in association with HEDP inhibitor is considered environmental friendly inhibitor for aluminium corrosion in alkaline (pH=11) media. The environment chosen is aqueous solution containing 60 ppm Cl- ions. To investigate the nature of the protective film, surface analytical techniques such as, Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) have been put to use in the present study. The formation of protective film has been confirmed using the electrochemical techniques such as polarization study and AC impedance spectral study. The above studies support the weight loss study.

scholarly journals Graphene Oxide Coatings Deposited on Steel Substrate Using Electrophoretic Deposition and Electrochemical Evaluation of Coatings in Saline Media

2018 ◽  
Vol 778 ◽  
pp. 111-117 ◽  
Author(s):  
Zaeem Ur Rehman ◽  
Mohsin Ali Raza ◽  
Faizan Ali Ghauri ◽  
Rumasa Kanwal ◽  
Akhlaq Ahmad ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Mild Steel ◽  
Electrophoretic Deposition ◽  
Electrochemical Impedance ◽  
Steel Substrate ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Force Microscopy ◽  
Atomic Force ◽  
Heat Treated

In this study graphene coatings were deposited on mild steel substrate using feasible and environmental friendly method. The successful synthesis of graphite oxide was carried by the modified Hummer’s method. Graphene oxide (GO) coatings were developed from GO/water suspension using electrophoretic deposition (EPD). The EPD parameters voltage and deposition time were varied to deposit uniform adherent coatings. The coatings were post heat treated at 200 °C in vacuum for 4h to assess the effect on coated samples. GO and GO-EPD coating morphology were characterized using Fourier transform infrared spectroscopy (FTIR), Atomic force microscopy (AFM) and Scanning electron microscopy (SEM). Linear polarization (LPR) and electrochemical impedance spectroscopy (EIS) tests were performed in saline solution to evaluate electrochemical response. Coatings were partially reduced due to removal of oxygen containing functional groups during EPD and post heat treatments. The GO post heat treated coating had better corrosion resistance ~2 times than that of bare mild steel and higher charge transfer resistance.

scholarly journals Physicochemical Performance of Collagen Modified by Melissa officinalis Extract

Cosmetics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 95
Author(s):  
Katarzyna Adamiak ◽  
Marzanna Kurzawa ◽  
Alina Sionkowska
Keyword(s):  
Mechanical Properties ◽  
Silver Carp ◽  
Antioxidant Properties ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Melissa Officinalis ◽  
Force Microscopy ◽  
Spectrophotometric Methods ◽  
Atomic Force ◽  
Potential Applications

Collagen-based materials are widely used as adhesives in medicine and cosmetology. However, for several applications, their properties require modification. In this work, the influence of Melissa officinalis on the properties of collagen films was studied. Collagen was extracted from Silver Carp skin. Thin collagen films were prepared by solvent evaporation. The structure of films was researched using infrared spectroscopy. The surface properties of films were investigated using Atomic Force Microscopy (AFM). Mechanical properties were measured as well. Antioxidant activity was determined by spectrophotometric methods using DPPH free radicals, FRAP, and CUPRAC methods. Total phenolic compounds were determined by the Folin–Ciocalteau method. It was found that the addition of Melissa officinalis modified the roughness of collagen films and their mechanical properties. Moreover, the obtained material has antioxidant properties. The parameters mentioned above are very important in potential applications of collagen films containing Melissa officinalis in cosmetics.

The role of drug as corrosion inhibitor for mild steel surface characterization by SEM, AFM, and FTIR

2016 ◽  
Vol 63 (4) ◽  
pp. 308-315 ◽  
Author(s):  
Md. Zaved Hossain Khan ◽  
Md. Abdul Aziz ◽  
Md. Rafiul Hasan ◽  
Md. Rashid Al-Mamun
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Mild Steel ◽  
Steel Surface ◽  
Content Type ◽  
Mild Steel Surface ◽  
Force Microscopy ◽  
Corrosion Rates ◽  
Atomic Force ◽  
Scanning Electron

Purpose The purpose of this study is to understand the inhibitor behavior of specific drug against mild steel corrosion and their adsorption mechanism on the surface. Design/methodology/approach Corrosion rates are influenced by the formation of inhibitor aggregates at the mild steel surface. Detail surface characterizations of mild steel have been studied before and after adsorption of drugs in 1N HCl solution. Scanning electron microscopy, atomic force microscopy and Fourier transform infrared spectroscopy were used to examine the effect of drug adsorption on steel surface. Findings Scanning electron microscopy analysis suggested that the metal had been protected from aggressive corrosion because of the addition of the inhibitors. Atomic force microscopy visualization confirmed the formation of protective layer on steel surface, resulting in the decrease in surface roughness with corrosion rates. The nature of metal surface has been analyzed by Fourier transform infrared spectroscopy. Originality/value The findings of this study will help us to understand the interaction of specific drugs with mild steel surface and their potential inhibition mechanism.

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