EFFECT OF HALIDE SALT ADDITION ON THE INHIBITION EFFICIENCY OF KETOCONAZOLE IN HYRDOCHLORIC ACID SOLUTION: GRAVIMETRIC METHOD

• Main Author: Rizqiyadi Putra, Gian
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/57880
• Institution: Institut Teknologi Bandung

In its application in oil and gas industry, ASTM A36 steel will often encounter corrosive substances such as HCl solution during the acidizing process. In industry the addition of organic inhibitor in an acidic environment is the most used corrosion protection method. One of the new types of organic inhibitor that are non-toxic, environmentally friendly, inexpensive, and readily available are found to be in the class of drugs such as ketoconazole. This study was conducted to determine the effect of the addition of halide salts on the inhibition efficiency of ketoconazole in 1 M HCl solution using gravimetric method and analysis of the significance of the type of halide salt, halide salt concentration, and effect of temperature on the corrosion rate of steel using analysis of variance (ANOVA) method. In this study, the immersion test was carried out for two days at 25? and six hours for temperature variations of 35?, 45?, and 55? at halide salt concentrations of 0.001 M, 0.003 M, 0.005 M, and 0.01 M. In the immersion test at 25? the halide salts KI, KBr, and KCl were used and in the immersion test with temperature variation KCl was used. The data from the immersion test were then processed to obtain the corrosion rate, inhibition efficiency, adsorption isotherm, adsorption mechanism, and other thermodynamic parameters. In the immersion test at 25?, it was found that the corrosion rate tends to decrease, and the inhibition efficiency of 200 ppm ketoconazole tends to increase with the increase in halide salts concentration. In the immersion test with temperature variations, it was found that the corrosion rate increased, and the inhibition efficiency of 200 ppm ketoconazole decreased with increasing temperature. The ANOVA results show that the added salt has a significant effect on the corrosion rate of steel. However, the interaction with the salt concentration variable was not significant. On the other hand, the temperature variable has significant effect on the corrosion rate of steel but the interaction with the KCl concentration was found to be not significant. The best 200 ppm ketoconazole inhibition efficiency value in the immersion test with the addition of halide salts (KI, KBr, KCl), respectively was 97.11%, 96.26%, and 97.36%, these values were obtained at a concentration of 0.01 M, 0.001 M, and 0.01 M. The best 200 ppm ketoconazole inhibition efficiency values with the addition of KCl at temperatures of 35?, 45?, and 55? are 95.22%, 94.92%, and 93.08% at concentrations of 0.01 M, 0.01 M, and 0.003 M.