scholarly journals Green Inhibitors for Corrosion Protection of Metals and Alloys: An Overview

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
B. E. Amitha Rani ◽  
Bharathi Bai J. Basu
Keyword(s):  
Corrosion Inhibitors ◽  
Organic Dyes ◽  
Sol Gel ◽  
Metals And Alloys ◽  
Self Healing ◽  
Plant Materials ◽  
Time Required ◽  
Organic Corrosion Inhibitors ◽  
Green Corrosion Inhibitors ◽  
Protection Of Metals

Corrosion control of metals is of technical, economical, environmental, and aesthetical importance. The use of inhibitors is one of the best options of protecting metals and alloys against corrosion. The environmental toxicity of organic corrosion inhibitors has prompted the search for green corrosion inhibitors as they are biodegradable, do not contain heavy metals or other toxic compounds. As in addition to being environmentally friendly and ecologically acceptable, plant products are inexpensive, readily available and renewable. Investigations of corrosion inhibiting abilities of tannins, alkaloids, organic,amino acids, and organic dyes of plant origin are of interest. In recent years, sol-gel coatings doped with inhibitors show real promise. Although substantial research has been devoted to corrosion inhibition by plant extracts, reports on the detailed mechanisms of the adsorption process and identification of the active ingredient are still scarce. Development of computational modeling backed by wet experimental results would help to fill this void and help understand the mechanism of inhibitor action, their adsorption patterns, the inhibitor-metal surface interface and aid the development of designer inhibitors with an understanding of the time required for the release of self-healing inhibitors. The present paper consciously restricts itself mainly to plant materials as green corrosion inhibitors.

scholarly journals Green Corrosion Inhibitors from Biomass and Natural Sources

2021 ◽  
pp. 46-69
Author(s):  
A.N. Grassino
Keyword(s):  
Green Chemistry ◽  
Corrosion Inhibitors ◽  
Metals And Alloys ◽  
Significant Problem ◽  
Biological Origin ◽  
Plant Materials ◽  
Natural Sources ◽  
The World ◽  
The One ◽  
Green Corrosion Inhibitors

Considering the fact that corrosion of metals and alloys presents a significant problem all over the world, the one of most recently utilized approaches to combat this problem necessitates the researches for employment of new materials, which satisfied the green chemistry idea. In this connection, the development of sustainable corrosion inhibitors is highly demanded due to the increasing of awareness of green chemistry principles not only in corrosion discipline, but also in all branches of science and technology. Due to natural and biological origin as well as their eco-friendly extraction, the plant materials and biomass derived from various waste sources could be applied as beneficial substances for metals and alloys protection in different corrosion environment. Therefore, this work reports the main findings regarding their employments as green anticorrosion substances.

scholarly journals Greener Approach towards Corrosion Inhibition

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Neha Patni ◽  
Shruti Agarwal ◽  
Pallav Shah
Keyword(s):  
Heavy Metals ◽  
Amino Acids ◽  
Plant Extracts ◽  
Corrosion Inhibitors ◽  
Organic Dyes ◽  
Plant Origin ◽  
Toxic Compounds ◽  
Green Inhibitors ◽  
Protective Films ◽  
Organic Corrosion Inhibitors

Corrosion control of metals is technically, economically, environmentally, and aesthetically important. The best option is to use inhibitors for protecting metals and alloys against corrosion. As organic corrosion inhibitors are toxic in nature, so green inhibitors which are biodegradable, without any heavy metals and other toxic compounds, are promoted. Also plant products are inexpensive, renewable, and readily available. Tannins, organic amino acids, alkaloids, and organic dyes of plant origin have good corrosion-inhibiting abilities. Plant extracts contain many organic compounds, having polar atoms such as O, P, S, and N. These are adsorbed on the metal surface by these polar atoms, and protective films are formed, and various adsorption isotherms are obeyed. Various types of green inhibitors and their effect on different metals are mentioned in the paper.

Microencapsulation: an emerging technique in the modern coating industry

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 106964-106979 ◽  
Author(s):  
Kunal Wazarkar ◽  
Deepak Patil ◽  
Ajay Rane ◽  
Dinesh Balgude ◽  
Mukesh Kathalewar ◽  
...  
Keyword(s):  
Corrosion Inhibitors ◽  
Protective Coatings ◽  
Sol Gel ◽  
Self Healing ◽  
The Past ◽  
Coating Industry

The protection of metal from corrosion is of great interest for which various methods have been implemented in the past such as organic–inorganic protective coatings, use of corrosion inhibitors, sol–gel coatings, self healing coatingsetc.

scholarly journals Sources of Active Ingredients for Sustainable Corrosion Inhibitors

2021 ◽  
pp. 30-45
Author(s):  
R. Sharma
Keyword(s):  
Surface Tension ◽  
Cost Effectiveness ◽  
Human Health ◽  
Corrosion Inhibitors ◽  
Metal Corrosion ◽  
Active Ingredients ◽  
Grave Problem ◽  
Organic Corrosion Inhibitors ◽  
Green Corrosion Inhibitors

Metal corrosion is a grave problem, having deleterious effects on human health, the economy, the environment, and many engineering schemes, for example, automobiles, aircraft, naval vessels, and pipelines. For the confirmation of enduring reliability and stability of alloys and metals, corrosion-protective surfaces are of the greatest significance, for example, ions and water, through restraining their interactions with corrosive species. Though, their applied submissions are frequently bounded whichever through deprived mechanical robustness or else through the incapability to resist low surface tension liquids, for example, alcohols and oil. In this chapter, we have focused on diverse materials as sustainable corrosion inhibitors such as organic corrosion inhibitors, green corrosion inhibitors, and polymer-based corrosion inhibitors to protect materials from being corroded. Amongst them, we especially focus on green corrosion inhibitors as a consequence of simple manufacturing, easy availability, cost-effectiveness, and biodegradable nature.

scholarly journals Case-Studies on Green Corrosion Inhibitors

2021 ◽  
pp. 204-221
Author(s):  
M. Ramesh
Keyword(s):  
Process Control ◽  
Case Studies ◽  
Corrosion Inhibitors ◽  
Low Cost ◽  
Metals And Alloys ◽  
Industrial Equipment ◽  
Green Inhibitors ◽  
Materials Used ◽  
Green Corrosion Inhibitors ◽  
Cathode Protection

Corrosion in metals and its alloys is an inevitable phenomenon but can be controlled by suitable classical methods like process control, cathode protection, surface treating methods, impurity reduction in metals and addition of metals to form alloys. Nevertheless, the employment of corrosion inhibitors is still a noteworthy and simplest of all the above processes in protecting the metals and alloys especially in acidic media. Protection of metals against corrosion not only prevents corrosion but also is beneficial in terms of money loss as far as industrial equipment, surfaces and vessels are concerned. Since the use of organic and inorganic inhibitors are highly discouraged due to their high cost and toxicity, necessity has adequately aroused the development of corrosion inhibitors which are natural and green. Trends, nowadays, focussed in controlling corrosion in various metals and alloys through green corrosion inhibitors consisting of natural elements alone. In contrast to the inorganic inhibitors, green corrosion inhibitors are characterized by biodegradability, low cost and meagre toxicity. Several researchers are now turning themselves towards the research of green inhibitors which are of no threat to humans and the ecosystem. The current discussion is focussed on the fundamentals of corrosion, corrosion inhibition, materials used for it and case studies of green inhibitors used for corrosion control in various conventional and monolithic metals.

Experience Using Electrochemical Noise for Testing Green Corrosion Inhibitors

2021 ◽  
Author(s):  
Douglas J Mills ◽  
Joshua Zatland ◽  
Nicola M Everitt
Keyword(s):  
Weight Loss ◽  
Crevice Corrosion ◽  
Corrosion Inhibitors ◽  
Electrochemical Noise ◽  
Banana Peel ◽  
Biomass Waste ◽  
Plant Materials ◽  
Complementary Interactions ◽  
Static Conditions ◽  
Green Corrosion Inhibitors

Abstract ‘Green’ corrosion inhibitors derived from plant materials provide environmentally friendly alternatives to conventional corrosion inhibitors. They are also much cheaper if using a biomass waste stream or abundant plant material as the source material. There are many examples in literature of different trials, from henna leaves to celery seeds to banana peel. Although it is known that extracts contain electron-rich polar atoms such as N, O, S and P which make them potentially effective inhibitors, it is difficult to predict on a molecular basis what will work well and what will not, since many interacting factors may be at play in complementary interactions. To assist in predicting the inhibition efficiency of inhibitors under varying conditions and choosing the most effective, what is needed is a short-term test which will obviate the need for tedious weight loss experiments. The Electrochemical Noise Method (ENM) uses the natural fluctuations which arise during electrochemical activity to gain information about the corrosion process. Using ENM is quick and non-intrusive method which makes it ideal for screening. Hence a rig has been designed and manufactured which allows for measurement to be made in stirred as well as static conditions and minimises the occurrence of crevice corrosion at the electrodes. Crevice corrosion is a hazard for ENM electrodes when trying to make a comparison with corrosion inhibition calculated using the standard weight loss measurement after immersion (WLM) method. For these preliminary trials we are exploring corrosion of mild steel in HCl in both stirred and unstirred conditions at room temperature. Results are presented comparing ENM measurements with conventional WLM for both Propargyl Alcohol (a conventional industrial corrosion inhibitor) and broccoli extract. Our results suggest that stirring does not make any difference to the noise measured in ENM. The amount of material lost calculated by ENM and WLM (Rn and weight loss values) can be directly compared and show close comparison. It seems likely that as a way of assessing inhibitors quickly (which is particularly important in the testing of "green" inhibitors) that this ENM approach has a lot to offer.

Protection of Aluminium Alloys via Hybrid Sol-Gel Coatings with Encapsulated Organic Corrosion Inhibitors

2006 ◽  
Vol 519-521 ◽  
pp. 661-666 ◽  
Author(s):  
A.N. Khramov ◽  
V.N. Balbyshev ◽  
R.A. Mantz
Keyword(s):  
Corrosion Protection ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Substrate Surface ◽  
Sol Gel ◽  
Matrix Material ◽  
The Matrix ◽  
Aluminum Alloy 2024 ◽  
Structural Hybrid ◽  
Organic Corrosion Inhibitors

Several heterocyclic organic corrosion inhibitors that contain ionazible functional group were encapsulated into nano-structural hybrid organo-silicate coating to improve its corrosion protection performance on aluminum alloy 2024-T3 substrate. When the coating is formed on the substrate surface, it serves simultaneously as protective barrier and as a reservoir for leachable corrosion inhibitor that is stored and released through the mechanism of reversible ionic interaction with the matrix material. The efficiency of active corrosion protection for these coating systems was examined by electrochemical methods including potentiodynamic polarization (PDS) and electrochemical impedance spectroscopy (EIS). The effects of chemical structure and the loading concentration of the inhibitor within the coating were determined.

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