Prevention of metallic corrosion by lauric hydrazide and its salts under vapor phase conditions

摘要

Six organic volatile corrosion inhibitors (VCI) were synthesized using lauric hydrazide with various acids such as cinnamic acid, succinic acid, nitrobenzoic acid, phthalic acid, and maleic acid and evaluated as corrosion inhibitors of mild steel, copper, brass, zinc, and aluminum by weight loss and potentiodynamic polarization methods. All the investigated VCI exhibited good inhibition efficiency for all the metals tested. The inhibition efficiency of all compounds increased as the inhibitor concentration increased. Lauric hydrazide cinnamate showed the best results among all compounds studied. In addition, all inhibitors showed anodic behavior. Adsorption studies demonstrated that all the investigated compounds followed Temkin's adsorption isotherm.