Integrated beta-carotene/3-methyl-1-vinylimidazolium-based ionic liquid as a corrosion inhibitor in brackish water

Abstract

Carrot or Daucus carota L. contains beta carotene which effectively reduces the corrosion rate. Ionic liquids (ILs) are also developed by a number of researchers because they have various abilities, especially in increasing the efficiency of corrosion inhibition. In this study, beta carotene (BC) and ILs in the form of 1-vinyl-3-methyl imidazolium (VMIM) are combined with the Diels Alder reaction so as to increase the ability of both compounds to protect metals from corrosion attack using ASTM A36 steel specimens in brackish water. EIS and Tafel methods are used in determining corrosion resistance. VMIM/BC is a mixed type inhibitor. The highest inhibition efficiency is 79% with the use of VMIM/BC at 100 ppm. Isothermal adsorption pattern following Langmuir adsorption equation.

Keywords

• Corrosion
• Green inhibitor corrosion
• Beta-carotene
• 1-Vinyl-3-methyl imidazolium based ionic liquid