Development and Testing of All Organic Volatile Corrosion Inhibitors

Five new organic volatile corrosion inhibitors (VCI) were synthesized using 1,6-diaminohexane with various acids such as cinnamic acid (C₉H₈O₂), nitrobenzoic acid (C₇H₅O₄N), phthalic acid (C₈H₆O₄), maleic acid (C₄H₄O₄), and orthophosphoric acid (H₃O₄P), and their inhibiting action on corrosion of aluminum, zinc, and mild steel was evaluated by various standard methods. The electrochemical potentiodynamic polarization method was also used to understand the electrochemical nature of inhibitors. All investigated VCI exhibited very good inhibition efficiency (IE) for all the metals.