EFFICIENCY PREDICTION OF IONIC LIQUID AS CORROSION INHIBITOR BY GROUP CONTRIBUTION METHOD

• Main Author: Juliyus Kevin, Yosef
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68467
• Institution: Institut Teknologi Bandung

Thermal and chemical resistance, rich electronegative heteroatoms and double bonds, very low vapor pressure, easy engineered hydrophobicity and hydrophilicity properties, good solubility, and the potential for a very large amount of ionic liquid are properties of ionic liquid considered as new corrosion inhibitors. which is claimed to be efficient and environmentally friendly. Recently, ionic liquid have limitations in the form of high prices and low availability because relatife to similar conventional compounds, the production of bulk-scale ionic liquids is still limited due to the number of producers, types of ionic liquids, and the number of ionic liquids produced especially for use as inhibitors. corrosion. Limitations of studies regarding to efficiency and toxicity become one of the obstacles for manufacturers to start producing a type of ionic liquid because the amount of ionic liquid that is available is not possible to be tested in a comprehensive laboratory. Therefore, rigorous research which work as initial selection in the future should be done. Effisiency prediction with group contribution method by using MATLAB2021b to process efficiency studies of carbon steel with 1M HCl solution with temperature variation. Model “O” with weight loss measurement method and anion chopped approach is the most succeed model with training and test AARD 10,24% and R2 0.749404 and validation AARD 16% and R2 0.6961. Efficiency pattern of Choline and BMIm can be predicted. Efficiency decrease with temperature increase except [BPyr]Br can be predicted. Concentration increase consistently increasing efficiency which follow Langmuir isothermal curve. Anion efficiency patter follows [CF3SO3] > [Ac] > I > Cl. Cation efficiency pattern is [MTOA]Cl > [BMIm]Cl > [Choline]Cl and [L-PAME] > [L-LME] > [L-AME] and [BPOBIm] > [VAPIm]. Lauryl sulfate anion and BDBOIm, BDBBIm, BDBMIm, HexDoHAm, HexDoPAm, and HexDoEAm can reach efficiency more than 150% at concentration 0.004%w/w.