Structural and electrochemical studies on sulfamethazine Schiff base transition metal complexes

Abstract

Coordination compounds of the Co(II), Νi(II) and Cu(II) ions with the Schiff base (SB) derived from sulfamethazine and salicylaldehyde have been prepared. Moreover, attempts have been made to confirm their structures by spectral and magnetic studies. On the other hand, the corrosion inhibition of copper in absence and in presence of the Schiff base and its related Cu(II) complexes has been investigated in 0.3 Μ HNO3 solution. The inhibition effect has been discussed in relation to the different adsorption behaviour of the ligand (SB) and the complexes at the Cu- electrode solution interface. It has been found that,at lower concentrations, Cu- complexes are relatively good inhibitors compared to (SB) and at higher concentrations, a maximum inhibition efficiency ≥ 90 % has been obtained.