Abstract
In the past, lives and wealth have been lost due to corrosion in almost all engineering fields. Not only this, the cost of reviving damaged equipments in the industry due to corrosion contributed a lot to the gross domestic product of a nation. Thus, all hands must be on desk to combat this harzadous act via time to time research on its final resolution. However, current research works have revealed effective and reliable corrosion inhibitors from pharmaceutical drugs, plant extracts and ionic liquids as organic green corrosion inhibitors (OGCIs) with accommodative attributes such as being environmentally friendly, readily available, biodegradable, non-harmful, relatively cheap and many others to mention a few. This paper opens readers mind into the detailed classifications, mechanisms and active functional groups of these eco-friendly OGCIs. Not only the corrosion efficiency calculation ways but also influencing factors on efficiency were presented. Plant extracts, pharmaceutical drugs, ionic liquids and synthetic inhibitors, as among major sources of OGCIs, used in preventing material corrosion in corrosive media were separately and comprehensively examined. The significance of values obtained from simulating presented mathematical models governing OGCIs kinetics, adsorption isotherm and adsorption thermodynamics was also included. In conclusion, beneficial recommendations for both current and prospective researchers in the field of Corrosion Engineering were presented.
Highlights
Metal degradation due to its contact with aqueous corrosive surroundings [1] through direct chemical or electrochemical reaction to form noble compounds [2] results to a phenomenon called corrosion
Compounds Corrosion inhibition efficiencies affected by N atom at ortho, meta and para position effects in pyridine chemical structure
The following few points were concluded after comprehensive scrutiny of literatures on this subject matter: 1. Many of the greeners considered for extraction of organic green corrosion inhibitors (OGCIs) are edible and are very useful for human need in many areas such as medicinal, pharmaceutical, food consumption and so on making them to be very competitive in terms of functionality
Summary
Metal degradation due to its contact with aqueous corrosive surroundings (air, moisture or soil) [1] through direct chemical or electrochemical reaction to form noble compounds [2] results to a phenomenon called corrosion. Typical examples of how EED can minimize corrosion include: avoid dissimilar metal contact when electrolyte is present, avoid crevice corrosion by joining different sections using welding rather than riveting, double section of the material under extreme degree of turbulence flow regime to avoid erosion-corrosion, equipment vibration should be avoided, storage tanks should be designed for easy drainage and so on This could be classified as either cathodic protection (minimizes metal surface corrosion by making it the cathode of an electrochemical cell such that potential difference between anode and cathode is minimized simultaneously) or anodic protection (which is based on the principle of passivity executed by connecting material to be protected to an external d.c power supply positive pole). Corrosion inhibitors (CIs) minimize or avert corrosion when added in small concentrations to a corrosive medium [17] by forming monomolecular film-adsorbed surface [18] which obstructs direct contact between metal and corrosive agents [19] They have been classified based on sources (as organic or inorganic) and techniques (synthesized or extracted). Results revealed natural plants extracts to be obtainable, biodegradable and harmless [31] with remarkable potential of inhibiting corrosion reaction
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
