Cyclohexanone Lab Report

881 Words4 Pages
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…show more content…
Chemical and electrochemical techniques were used in measuring the corrosion rate. Moreover, the adsorption behavior and the effect of temperature were also studied. 2. Experimental method 2.1. General procedure for synthesis of 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbonitrile. To a solution of cyclohexanone (2.94 g, 30 mmol), malononitrile (1.32 g, 20 mmol), and elemental sulfur (0.64 g, 20 mmol) in 20 mL EtOH, piperidine (0.85 g, 10 mmol) was slowly added and the temperature was kept under 50 ᵒC. The reaction mixture was heated under reflux for 2 h and was left to cool down overnight. The precipitated product was filtered and washed with cold ethanol (2 x 10 mL). Brown crystals product; mp 143 ᵒC was crystallized from ethanol. 2.2. Electrode preparation X52 Carbon steel sheets were obtained from Mustorod petroleum pipe Company. The carbon steel contains less than 0.28% C, 1.4% Mn, 0.06% V, 0.06% Ti and the remainder iron. X52CS electrode with bottom exposed surface area of 2.25cm2 was mechanically polished with different grade emery paper, degreased with acetone, rinsed in doubly distilled water and finally dried between two filter papers at room…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

More about Cyclohexanone Lab Report

Open Document