Fig. 22
From: Recent advances in the use of benzimidazoles as corrosion inhibitors
(Reproduced with permission from Elsevier, Ref. [81])
Schematic representation of adsorption behaviour of bis(benzimidazole) on mild steel in 1 M HCl solution: a mild steel surface with positive charge, b mild steel surface with negative charge and c mild steel surface at potential of zero charge