Review Article
Green Inhibitors for Corrosion Protection of Metals and Alloys: An Overview
Table 1
Green inhibitors used for corrosion inhibition of steel.
| Sl. no. | Metal | Inhibitor source | Active ingredient | References |
| (1) | Steel | Tamarind | | [39] |
| (2) | Steel | Tea leaves | | [40] |
| (3) | Steel | Pomegranate juice and peels | | [41] |
| (4) | Steel | Emblica officinalis | | [42] |
| (5) | Steel | Terminalia bellerica | | [43] |
| (6) | Steel | Eucalyptus oil | Monomtrene 1,8-cineole | [44] |
| (7) | | Rosemary | | [45] |
| (8) | C-steel, Ni, Zn | Lawsonia extract (Henna) | Lawsone (2-hydroxy-1, 4-napthoquinone resin and tannin, coumarine, Gallic, acid, and sterols) | [46] |
| (9) | Mild steel | Gum exudate | Hexuronic acid, neutral sugar residues, volatile monoterpenes, canaric and related triterpene acids, reducing and nonreducing sugars | [47] |
| (10) | Mild steel | Musa sapientum peels (Banana peels) | | [48] |
| (11) | Carbon steel | Natural amino acids—alanine, glycine, and leucine | | [48] |
| (12) | Steel | Natural amino acids | | [15] |
| (13) | Mild steel | Garcinia kola seed | Primary and secondary amines Unsaturated fatty acids and biflavnone | [49] |
| (14) | Steel | Auforpio turkiale | Protein hydrolysis | [50] |
| (15) | Steel | Azydracta indica | Protein hydrolysis | [51] |
| (16) | Steel | Aloe leaves | | [52] |
| (17) | Steel | Mango/orange peels | | [53] |
| (18) | Steel | Hibiscus sabdariffa (Calyx extract) in 1 M H2SO4 and 2 M HCl solutions, Stock 10–50% | Molecular protonated organic species in the extract. Ascorbic acid, amino acids, flavonoids, Pigments and carotene | [54] |
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