Benzotriazole and related compounds as corrosion inhibitors for copper was written by Cotton, Joseph B.;Scholes, Ian R.. And the article was included in British Corrosion Journal in 1967.Reference of 4887-83-6 This article mentions the following:
With reference to the corrosion inhibition of Cu by benzotriazole and analogous compounds reacted with Cu+ and Cu2+ ions. Recent data and practical operational experience are detailed. Related compounds included those where 1 or 2 of the N atoms of benzotriazole are substituted by C or the labile H atom is replaced by a CH3 group, i.e. indazole, benzimidazole, indole, and methyl benzotriazole. Salt-spray testing showed only benzotriazole and indazole prevented staining and only the former retained tarnish-resistant properties after the treated Cu surface was washed with organic solvents; the N-H group and one another N atoms and an insoluble complex formation appear necessary. Substitutional studies in the benzene ring showed Cl or nitro-groups in the 5-position increased acidity of the labile H atom but did not affect inhibition effects; naphthotriazole behaved similarly but 5-hydroxy indazole and 4-methyl benzimidazole were less effective than the parent compounds Generally 5-membered heterocyclics, imidozole, 1,2,4-triazole, and pyrazole and their derivatives showed little inhibitive effect. The benzotriazole-CuCl2 reaction product had a metal-organic ratio of 1 atom Cu: 1 mol. of benzotriazole; it was diamagnetic, amorphous, or microcrystalline, probably with a basic formula C6H4N3Cu. Reaction with CuCl2 did not give a 2:1 benzotriazole:Cu ratio and the product had excess Cu, chloride and H2O. The surface film apparently forms a true metal surface bond and the complex is polymeric. Application aspects discussed include dipping procedure, its use for brass coiled strip protection out-of-doors, swabbing processes, the use of impregnated paper for protection, its application to maintain solderability on surfaces, its use with brass nickel, silver, etc. to stop stress corrosion, etc. In the experiment, the researchers used many compounds, for example, 7-Methyl-1H-benzo[d]imidazole (cas: 4887-83-6Reference of 4887-83-6).
7-Methyl-1H-benzo[d]imidazole (cas: 4887-83-6) belongs to imidazole derivatives. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole has become an important synthon in the development of new drugs. Imidazole also acts as a microtubule destabilizing agents and inhibits topoisomerase and Cytochrome P450 Family 26 Subfamily A Member 1 (CYP26A1) enzymes.Reference of 4887-83-6
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem