Review Article
Green Inhibitors for Corrosion Protection of Metals and Alloys: An Overview
Table 2
Green Inhibitors used for corrosion inhibition of aluminum, aluminum alloys, and other metals and alloys.
| Sl. no. | Metal | Inhibitor source | Active ingredient | References |
| (1) | Al | CeCl3 and mercaptobenzothiazole (MBT) | | [55] |
| (2) | Al, steel | Aqueous extract of tobacco plant and its parts | Nicotine | [56] |
| (3) | Al | Vanillin | | [57] |
| (4) | Al-Mg alloy | Aqueous extract of Rosmarinus officinalis—Neutral phenol subfraction of the aqueous extract | Catechin | [58] |
| (5) | Al | Sulphates/molybdates and dichromates as passivators | | [59] |
| (6) | Al | Amino and polyamino acids—aspartic acid | | [6] |
| (7) | Al | Pyridine and its selected derivatives (symmetric collidine and 2,5-dibrompyridine) | | [60] |
| (8) | Al | Citric acid | | [61] |
| (9) | Fe, Al | Benzoic acid | | [62] |
| (10) | Al | Rutin and quercetin | | [63] |
| (11) | Al | | | US Patent 5951747 |
| (12) | Al |
Polybutadieonic acid | | [64] |
| (13) | Al and Zn | Saccharides—mannose and fructose | | [65] |
| (14) | Al, Al-6061 and Al-Cu | Neutral solutions using sulphates, molybdates, and dichromates | | [66] |
| (15) | Al | Vernonia amygdalina (Bitter leaf) | | [67] |
| (16) | Al | Prosopis—cineraria (khejari) | | [60] |
| (17) | Al | Tannin beetroot | | [68] |
| (18) | Al |
Saponin | | [69] |
| (19) | Al | Acacia concianna | | [70] |
| (20) | Al and Zn | Saccharides | | [71] |
| (21) | Al | Opuntia (modified stems cladodes) | Polysaccharide (mucilage and pectin) | [72] |
| (22) | Al-Mg alloy | Rosmarinus officinalis | | [8] |
| (23) | Zn | Metal chelates of citric acid | | [61] |
| (24) | Zn | Onion juice | S-containing acids (glutamyl peptides) S-(1-propenyl) L-cysteine sulfoxide, and S-2-carboxypropyl glutathione | [63] |
| (25) | Sn | Natural honey (acacia chestnut) | | [64] |
| (26) | Sn | Black radish | 120 | [8] |
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