Synthesis of 2-(2-Hydroxyphenyl)-4.5-diphenylimidazole as corrosion inhibitor towards Carbon Steel

• Main Author: NAZRIGA SUNARTO (NIM 10504014), YOAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/11639
• Institution: Institut Teknologi Bandung

Corrosion is one of problems in industry, particularly petrochemical industry. Utilizing organic compounds is one of alternative ways to inhibit corrosion processes. Imidazole derivative compounds have been tested and used as one of potential corrosion inhibitors. These compounds have different corrosion inhibition activities depending on their structures. To understand the correlation between structure and its corrosion inhibition activities, one of imidazole derivative compounds, that is 2-(2-hidroxyphenyl)-4.5-diphenylimidazole, was synthesized utilizing MAOS (Microwave Assisted Organic Synthesis) method. The corrosion inhibition activities of 2-(2-hidroxyphenyl)-4.5-diphenylimidazole were studied at various concentrations and temperatures utilizing Tafel and EIS method. The resulting data confirmed that the most suitable relationship between concentration of 2-(2-hidroxyphenyl)-4.5-diphenylimidazole and its degree of surface coverage, is Langmuir isotherm adsorption. The study of corrosion inhibition activities at various concentrations and temperatures gives thermodynamics data, such as free Gibbs adsorption energy, which value is -34.22 kJ/mol and -32.99 kJ/mol, according to Tafel and EIS method respectively, indicating a semi-chemical adsorption (semi-chemisorption) mechanism of the corrosion inhibition process utilizing 2-(2-hidroxyphenyl)-4.5-diphenylimidazole.