Influence of Some 6-Methoxy-Aminobenzothiazole Derivatives on Corrosion of Ferrous and Nonferrous Metals Under Vapor-Phase Conditions

Use of vapor-phase corrosion inhibitors is one of the most effective methods for preventing atmospheric corrosion during transport and storage. In an attempt to develop multimetal vapor-phase corrosion inhibitors, five aminobenzothiazole derivatives were synthesized to investigate their inhibiting action on corrosion of mild steel, copper, and brass at 100% relative humidity by weight loss and potentiodynamic polarization methods. 6-methoxy-aminobenzothiazole cinnamate exhibited the best performance among all the studied compounds by giving >90% inhibition efficiency for all the metals investigated. All the inhibitors shifted corrosion potential of all metals significantly to the noble direction, indicating that they are predominantly anodic inhibitors.