Corrosion Inhibition of Mild-Steel in (1M) HCl using Spands Reagent

The effect of Spands Reagent on the dissolution of Mild-steel in  1M HCl  solution was studied using weight loss and galvanostatic polarization techniques. The inhibition efficiency of inhibitor increases with concentration to attain (75.26%) at concentration  1×10-2 M ,and standing time for 180 min at 25°C. Temperature effect on the corrosion behavior was studied at temperature range from 25-45°C, the results showed that inhibition efficiency decreased with increasing temperature to attain (64.53%) at concentration 1×10-2  M at 45°C and with standing time equal to 180 min. The effect of temperature on the rate of corrosion in the absence and presence of   Spands Reagent was also studied. The Kinetic Parameters were calculated and discussed. The polarization curves revealed that the studied inhibitor represent a mixed–type inhibitors. Adsorption of inhibitor was isotherm physisorption type.