Synthesis, structural and corrosion inhibition studies on cobalt(II), nickel(II), copper(II) and zinc(II) complexes with 2-acetylthiophene benzoylhydrazone

Versatile coordination behaviour of a multi-dentate Schiff base with manganese(II), copper(II) and zinc(II) ions and their corrosion inhibition study

“…More reliable results can be obtained by this method, since it does not disturb the double layer at the metal/solution interface [42]. Consequently, EIS is specially a useful method to follow the evaluation of inhibitor-metal system over time [27]. The effect of inhibitor on mild steel was studied by using EIS measurements in 1M HCl in the absence and presence of studied compounds at 303 K. The impedance plots and proposed equivalent electrical circuit of mild steel in 1M…”

“…The metal complexes are expected to provide better corrosion inhibition efficiency than the pure organic ligands due to their larger size and compactness. In view of the above, and only a few reports available on the corrosion inhibition properties of transition metal complexes of aroylhydrazone Schiff bases [13,27], we have synthesized and characterized the Mn(II), Cu(II) and Zn(II) complexes with 2-amino-benzoic acid [1-(2-hydroxy-phenyl)-propylidene]-hydrazide (H 2 abph) and studied their anti-corrosion properties on mild steel in acid solution.…”

Adsorption behaviour of o-hydroxy acetophenone benzoyl hydrazone on mild steel/hydrochloric acid interface

“…The Nyquist plots, both in the absence and presence of the inhibitor are characterised by two time constants, with a depressed capacitive semicircle at high frequency (HF) region followed by an inductive loop at low frequency (LF) region. The depressed nature of the semicircles is a characteristic of solid electrodes; such frequency dispersion has been attributed to micro roughness and other inhomogenities of the solid electrode [19,20]. The high frequency capacitive loop may be due to a charge transfer process.…”

Corrosion Inhibition of Carbon Steel in 1 M Sulphuric Acid Solution by Extract of Eucalyptus globulus Leaves Cultivated in Tunisia Arid Zones

“…The presence of L in the impedance spectra in the presence of the inhibitor indicates that steel is always dissolved by the direct charge transfer at the E. globulus adsorbed in the steel surface [53]. The results of regression calculations with a simplex method for this system are overlaid on Fig.…”