Schiff Base Derivatives Essay

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Some Schiff base derivatives were tested as corrosion inhibitors for X52 Carbon steel in 0.5 M HCl using weight loss and electrochemical techniques. The results showed that the inhibition efficiency increases with increasing the concentration of the Schiff base derivatives. Polarization measurements showed that these derivatives act as mixed-type inhibitors. The adsorption of these inhibitors on the surface of Carbon steel follows Temkin’s adsorption isotherm. The effect of temperature on the corrosion was investigated by some thermodynamic parameters were calculated.

Introduction
Acid solutions are widely used in industrial applications such as pickling, cleaning and rescaling [1]. During such applications corrosion inhibitors are needed to reduce the corrosion rates of metallic materials. Most of the efficient inhibitors are organic compounds contain oxygen, sulfur or nitrogen atoms through which they can adsorbed on the metal surface [2]. Many Schiff base compounds have been reported in literature as corrosion inhibitors for steel [3–6], copper [7], aluminum [8, 9], and zinc [10]. Some research work [11, 12] stated that the inhibition efficiencies of Schiff bases are much greater than those of corresponding amines and aldehydes. It was postulated that this behavior may be due to the presence of …show more content…

The specimens were abraded with different grade emery papers, washed with distilled water, degreased with acetone, dried. The specimens were accurately weighted and were suspended by suitable glass hooks at the edge of the basin, and under the surface of the test solution by about 1 cm. Solution containing 0.5MHCl solution with and without various concentrations of Schiff base inhibitors. After 24 h exposure, the specimens were taken out rinsed thoroughly with distilled water, dried and weighted accurately. The weight loss (WL) in gm-2 h-1 was calculated using the following

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