Corrosion inhibition of API 5L X80 pipeline steel in acidic environment using aqueous extract of Thevetia peruviana

The gum exudate from Terminalia Mentaly (GETM) was investigated for corrosion inhibition of N80 carbon steel in 1 M HCl solution using electrochemical and gravimetric measurements. GETM was found to be a good inhibitor for N80 steel corrosion in the 1 M HCl stimulated acidizing solution, affecting both cathodic and anodic reactions. The inhibition efficiency of GETM increased as the concentration increases but decreased with rise in temperature. Maximum inhibition efficiencies of 92.4%, 95.5% and 92.5% were obtained from electrochemical ımpedance spectroscopy (EIS), gravimetric and potentiodynamic polarization studies respectively, at 2.0 g/L GETM in 1 M HCl. Adsorption of GETM at the studied temperatures was found to follow Langmuir and Temkin isotherms and the action of inhibition suggests both physical and chemical adsorption on the metal surface. It was found from polarization study that GETM is a mixed type inhibitor but slightly acted more like an anodic inhibitor. EIS studies revealed that GETM increased the charge transfer resistance while diminishing the double layer capacitance with increasing concentration due to the formation of protective film on the steel. Surface morphological study performed using scanning electron microscopy (SEM) confirmed the formation of protective film of GETM on the N80 steel surface.

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Synthesis and characterization of Zn doped WO₃ nanoparticles: photocatalytic, antifungal and antibacterial activities evaluation

Arshad¹,

Ehtisham-ul-Haque

Bilal

et al. 2020

Mater. Res. Express

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In view of enhanced bioactivity and photocatalytic applications, the doped material has gained much attention and present study was focused on the preparation of Zn doped WO 3 (Zn-d-WO 3 ) via precipitation method. The prepared Zn-d-WO 3 was characterized by Scanning Electron Microscopy (SEM), x-ray diffraction (XRD), Energy-dispersive x-ray (EDX). The effect of Zn concentration was studied on antibacterial, antifungal and photocatalytic activities along with structural and morphological variation. The Zn-d-WO 3 was triclinic, spherical and rod shaped and particle size was decreased as the Zn concentration increased. The antimicrobial activity of Zn-d-WO 3 was evaluated against a panel of bacterial strains (Escherichia coli, Pasturellamu ltocida, Bacillus subtilis, Staphylococcus aureus) and fungal strain (Aspergillus niger, Aspergillus flavus, Penicillium notatum). The Zn-d-WO 3 showed promising antibacterial activity with minimum inhibitory concentration (MIC) values in the range of 211-387 (μg ml −1 ), whereas the antifungal activity was less than the standard (Fluconazole), which revealed that the Zn-d-WO 3 are highly active against bacterial strains since activity was comparable with standard drug (Rifampicin). The photocatalytic activity (PCA) was evaluated by degrading methylene blue (MB) dye in an aqueous solution and dye degradation of 78% and 92% was achieved in 120 min under visible and UV irradiation, respectively. Results revealed that the Zn-d-WO 3 could possibly be used as photocatalyst for the degradation of dyes in wastewater.

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Corrosion inhibition of API 5L X80 pipeline steel in acidic environment using aqueous extract of Thevetia peruviana

Cited by 4 publications

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Effect of green and sustainable extracted fucoidan polysaccharide as a corrosion inhibitor in 3.5% NaCl

Effect of green and sustainable extracted fucoidan polysaccharide as a corrosion inhibitor in 3.5% NaCl

Experimental and surface morphological study of corrosion inhibition of N80 carbon steel in HCl stimulated acidizing solution using gum exudate from Terminalia Mentaly

Synthesis and characterization of Zn doped WO₃ nanoparticles: photocatalytic, antifungal and antibacterial activities evaluation

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Corrosion inhibition of API 5L X80 pipeline steel in acidic environment using aqueous extract of Thevetia peruviana

Cited by 4 publications

References 0 publications

Effect of green and sustainable extracted fucoidan polysaccharide as a corrosion inhibitor in 3.5% NaCl

Effect of green and sustainable extracted fucoidan polysaccharide as a corrosion inhibitor in 3.5% NaCl

Experimental and surface morphological study of corrosion inhibition of N80 carbon steel in HCl stimulated acidizing solution using gum exudate from Terminalia Mentaly

Synthesis and characterization of Zn doped WO3 nanoparticles: photocatalytic, antifungal and antibacterial activities evaluation

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Product

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Synthesis and characterization of Zn doped WO₃ nanoparticles: photocatalytic, antifungal and antibacterial activities evaluation