scholarly journals Corrosion Inhibition of Carbon Steel in HCl Solution by Some Plant Extracts

2012 ◽  
Vol 2012 ◽  
pp. 1-20 ◽  
Author(s):  
Ambrish Singh ◽  
Eno E. Ebenso ◽  
M. A. Quraishi
Keyword(s):  
Mild Steel ◽  
Plant Extracts ◽  
Corrosion Inhibitors ◽  
The Other ◽  
Acid Media ◽  
Ecological Awareness ◽  
Maximum Inhibition ◽  
Inhibition Performance ◽  
Green Corrosion Inhibitors ◽  
Seed Extracts

The strict environmental legislations and increasing ecological awareness among scientists have led to the development of “green” alternatives to mitigate corrosion. In the present work, literature on green corrosion inhibitors has been reviewed, and the salient features of our work on green corrosion inhibitors have been highlighted. Among the studied leaves, extractAndrographis paniculatashowed better inhibition performance (98%) than the other leaves extract.Strychnos nuxvomicashowed better inhibition (98%) than the other seed extracts.Moringa oleiferais reflected as a good corrosion inhibitor of mild steel in 1 M HCl with 98% inhibition efficiency among the studied fruits extract.Bacopa monnierishowed its maximum inhibition performance to be 95% at 600 ppm among the investigated stem extracts. All the reported plant extracts were found to inhibit the corrosion of mild steel in acid media.

scholarly journals CORROSION INHIBITION PERFORMANCE OF PINK, ORANGE AND WHITE COLOURED BOUGAINVILLEA GLABRA BRACT EXTRACT ON MILD STEEL IN 1N HCl

2017 ◽  
Vol 4 (1) ◽  
pp. 59-64
Author(s):  
Gunavathy N ◽  
Sangeetha M
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Optimum Concentration ◽  
Ftir Analysis ◽  
Acid Media ◽  
Maximum Inhibition ◽  
Corrosion Inhibition Efficiency ◽  
Inhibition Performance ◽  
Bougainvillea Glabra

The present study was undertaken to find out the phytochemicals present in Bougainvillea glabra bracts extract and to compare the corrosion inhibition efficiency between B.glabra Pink, Orange and White coloured bract extract on mild steel in 1N HCl. Phyto chemical analysis showed the presence of alkaloids, flavonoids, phenolic compounds and tannins in the extract as confirmed by implying different qualitative tests specified for these phytochemical. Corrosion rate, inhibition efficiency, FTIR analysis was determined. The corrosion of mild steel in 1N HCl acid media was significantly reduced upon the additions of BG bract extracts. The inhibition efficiency increased with the increasing concentration of the inhibitor. Maximum inhibition efficiency was observed at an optimum concentration of 2 % v/v.

scholarly journals Green Corrosion Inhibition of Mild Steel by Hydrazone Derivatives in 1.0 M HCl

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 640 ◽  
Author(s):  
Abdelkarim Chaouiki ◽  
Maryam Chafiq ◽  
Hassane Lgaz ◽  
Mustafa R. Al-Hadeethi ◽  
Ismat H. Ali ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Electrochemical Techniques ◽  
Electrochemical Studies ◽  
X Ray ◽  
Maximum Inhibition ◽  
Langmuir Isotherm Model ◽  
Inhibition Performance ◽  
High Inhibition ◽  
Scanning Electron

In the present study, the inhibition performance of two synthesized hydrazone derivatives (HDZs), namely, (E)-N′-(2,4-dimethoxybenzylidene)-2-(6-methoxynaphthalen-2-yl) propanehydrazide (HYD-1) and N′-cyclohexylidene-2-(6-methoxynaphthalen-2-yl) propanehydrazide (HYD-2) on mild steel (MS) in 1.0 M HCl was investigated using weight loss measurements, electrochemical techniques, and scanning electron microscope (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX). The experimental data suggested that the hydrazone derivatives exhibited a high inhibition performance, which increases with increasing their concentrations. HYD-1 and HYD-2 presented maximum inhibition efficiencies of 96% and 84%, respectively, at an optimal concentration of 5 × 10–3 M. The principal observations that resulted from electrochemical studies are that HYDs affected both anodic and cathodic reactions (mixed inhibitors). Their adsorption, which is a combination of chemisorption and physisorption, obeyed the Langmuir isotherm model. Furthermore, the temperature effect was carried out at various temperatures ranging from 303 to 333 K to verify the corrosion inhibition performance of HYD-1 at higher temperatures. Moreover, SEM-EDX analysis confirmed that HYDs can ensure remarkable prevention against corrosion through the adsorption onto the metal surface.

Corrosion inhibition characteristics of Thymus vulgaris, Xylopia aethiopica and Zingiber officinale extracts on mild steel in H2SO4 solutions

2014 ◽  
Vol 43 (6) ◽  
pp. 357-364 ◽  
Author(s):  
P.C. Okafor ◽  
E.A. Apebende
Keyword(s):  
Mild Steel ◽  
Plant Extracts ◽  
Corrosion Inhibitors ◽  
Physical Adsorption ◽  
Zingiber Officinale ◽  
Thymus Vulgaris ◽  
Content Type ◽  
Adsorption Sites ◽  
Ethanol Extracts ◽  
Xylopia Aethiopica

Purpose This paper aims to evaluate the inhibitive action of the corrosion of mild steel in sulphuric acid solutions by ethanol extracts of Thymus vulgaris (TYV), Xylopia aethiopica (XYA) and Zingiber officinale (ZGO) as eco-friendly and non-toxic mild-steel corrosion inhibitors in H2SO4 solutions. Design/methodology/approach Ethanol extracts of TYV leaves, XYA fruits and ZGO roots were used as inhibitors in various corrosion tests. Gravimetric and gasometric techniques were used to characterize the mechanism of inhibition. Findings Results indicate that the extracts inhibit the corrosion process efficiently. Inhibition efficiency was found to increase with an increase in extract concentration and decrease with an increase in temperature. Inhibition efficiencies followed the trend TYV > ZGO > XYA. Thermodynamic considerations revealed that the energy of activation increased in the presence of the plant extracts. Adsorption of the plant extracts on mild steel surface occurred spontaneously, and Ea and ΔGads values confirm a physical adsorption processes. Phytochemical studies showed the presence of saponoids, flavonoids and polyphenols whose attachment to adsorption sites on the metal surface is responsible for the inhibition process. Experimental data fit the Langmuir adsorption isotherm. Practical implications The plant extracts can be used in chemical cleaning and picking processes. Originality/value The research provides information on the possible use of the ethanol extracts from TYV leaves, XYA fruits and ZGO roots as sources of cheap, eco-friendly and non-toxic corrosion inhibitors.

Amino acids modified konjac glucomannan as green corrosion inhibitors for mild steel in HCl solution

2018 ◽  
Vol 181 ◽  
pp. 191-199 ◽  
Author(s):  
Kegui Zhang ◽  
Wenzhong Yang ◽  
Xiaoshuang Yin ◽  
Yun Chen ◽  
Ying Liu ◽  
...  
Keyword(s):  
Amino Acids ◽  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Konjac Glucomannan ◽  
Green Corrosion Inhibitors ◽  
Hcl Solution

scholarly journals Experimental and DFT studies on the ultrasonic energy-assisted extraction of the phytochemicals of Catharanthus roseus as green corrosion inhibitors for mild steel in NaCl medium

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5399-5411 ◽  
Author(s):  
N. Palaniappan ◽  
I. Cole ◽  
F. Caballero-Briones ◽  
S. Manickam ◽  
K. R. Justin Thomas ◽  
...  
Keyword(s):  
Mild Steel ◽  
Catharanthus Roseus ◽  
Corrosion Inhibitors ◽  
Ultrasonic Energy ◽  
Dft Studies ◽  
Assisted Extraction ◽  
Green Corrosion Inhibitors ◽  
Bonding Electron

C. roseus phytochemicals are physisorbed on the 111 Fe surface, and the oxygen non-bonding electron chemisorbed on the polarized state 111 Fe surface.

scholarly journals Organic green corrosion inhibitors (OGCIs): a critical review

2019 ◽  
Vol 37 (2) ◽  
pp. 71-102 ◽  
Author(s):  
Lekan Taofeek Popoola
Keyword(s):  
Plant Extracts ◽  
Corrosion Inhibitors ◽  
Adsorption Thermodynamics ◽  
Corrosive Media ◽  
Environmental Threat ◽  
Factors Influencing ◽  
Damage Costs ◽  
Future Challenges ◽  
Almost All ◽  
Green Corrosion Inhibitors

AbstractOver the decades, corrosion has resulted in loss of lives accorded with damage costs in almost all engineering fields. Thus, it is seen as an environmental threat with catastrophic attributes, which calls for day-to-day research on its final resolution. Recent studies have proven organic green corrosion inhibitors (OGCIs) from plant extracts with biodegradable, environmentally accommodative, relatively cheap, and nonharmful features as the most perfect approach of tackling the problem. This review gives succinct discussion on the mechanisms, classifications, and active functional groups of OGCIs. Measuring ways and factors influencing their efficiency are presented. Also, various plant extracts used as OGCIs in preventing material corrosion in corrosive media coupled with their respective findings, applied characterization techniques, and future challenges are presented. The significance of values obtained from simulating presented mathematical models governing OGCI kinetics, adsorption isotherm, and adsorption thermodynamics is also included. In conclusion, recommendations that will broaden the usage of OGCIs from plant extracts for inhibiting corrosion of materials are presented for prospective researchers in the field of corrosion.

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