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.

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 Potential of using plant extracts as green corrosion inhibitors in the petroleum industry

2021 ◽  
Vol 36 (5) ◽  
pp. 132-139
Author(s):  
Katarina Žbulj ◽  
Gordana Bilić ◽  
Lidia Hrnčević ◽  
Katarina Simon
Keyword(s):  
Plant Extracts ◽  
Inhibitory Action ◽  
Room Temperature ◽  
Corrosion Inhibitors ◽  
Petroleum Industry ◽  
Effective Concentration ◽  
Brine Solution ◽  
High Effectiveness ◽  
Green Corrosion Inhibitors ◽  
Dominant Influence

In this paper, preliminary studies of ten different plant extracts as potential corrosion inhibitors of carbon steel were examined. For each extract, the concentration range in which it shows anti-corrosion action was first determined, and then the most effective concentration was determined for each extract. The tests were performed in a brine solution saturated with CO2 at room temperature. The aim of this study was to isolate extracts with high effectiveness and subsequent electrochemical and surface methods to determine the mechanism of inhibitory action. For this purpose, potentiodynamic polarization was performed with Tafel extrapolation. Among all the tested extracts, lady’s mantle (92.17%) and dandelion root (95.07%) stood out with their effectiveness. Both tested extracts showed the behaviour of a mixed corrosion inhibitor with a dominant influence on the anode process.

Plant extracts as “green” corrosion inhibitors for steel in sulphuric acid

2016 ◽  
Vol 70 (9) ◽  
Author(s):  
Shi Mo ◽  
Hong-Qun Luo ◽  
Nian-Bing Li
Keyword(s):  
Natural Products ◽  
Hydrochloric Acid ◽  
Corrosion Inhibitor ◽  
Sulphuric Acid ◽  
Plant Extracts ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Low Toxicity ◽  
Corrosion Inhibition Efficiency ◽  
Green Corrosion Inhibitors

AbstractIn recent years, plant extracts have become the focus of corrosion inhibitor research due to their low toxicity, easy availability and economical preparation. This review presents most of the recent contributions made to the application of plant extracts as corrosion inhibitors for steel in sulphuric acid, as well as in both hydrochloric acid and sulphuric acid. The constituents, properties, adsorption modes and inhibition mechanisms of these natural products are discussed. Evaluation methods and the factors that influence the corrosion-inhibition efficiency of plant extracts are also summarised.

scholarly journals Plant Extracts as Green Corrosion Inhibitors for Different Metal Surfaces and Corrosive Media: A Review

Processes ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 942
Author(s):  
Alan Miralrio ◽  
Araceli Espinoza Vázquez
Keyword(s):  
Metal Surface ◽  
Plant Extracts ◽  
Photoelectron Spectroscopy ◽  
Metal Surfaces ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Polar Regions ◽  
Adsorption Model ◽  
Corrosive Media ◽  
Electrochemical Tests

Natural extracts have been widely used to protect metal materials from corrosion. The efficiency of these extracts as corrosion inhibitors is commonly evaluated through electrochemical tests, which include techniques such as potentiodynamic polarization, electrochemical impedance spectroscopy, and weight loss measurement. The inhibition efficiency of different extract concentrations is a valuable indicator to obtain a clear outlook to choose an extract for a particular purpose. A complementary vision of the effectiveness of green extracts to inhibit the corrosion of metals is obtained by means of surface characterizations; atomic force microscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy analysis are experimental techniques widely used for this purpose. Moreover, theoretical studies are usually addressed to elucidate the nature of the corrosion inhibitor—metal surface interactions. In addition, calculations have been employed to predict how other organic substances behave on metal surfaces and to provide experimental work with fresh proposals. This work reports a broad overview of the current state of the art research on the study of new extracts as corrosion inhibitors on metal surfaces in corrosive media. Most constituents obtained from plant extracts are adsorbed on the metal, following the Langmuir adsorption model. Electron-rich regions and heteroatoms have been found to be responsible for chemisorption on the metal surface, whereas physisorption is due to the polar regions of the inhibitor molecules. The plant extracts compiled in this work obtained corrosion inhibition efficiencies above 60%, most of them around 80–90%. The effect of concentration, extraction solvent, temperature, and immersion time were studied as well. Additional studies regarding plant extracts as corrosion inhibitors on metals are needed to produce solutions for industrial purposes.

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