SYNTHESIS AND CHARACTERIZATION OF N-ACETYL PROLINE AS CORROSION INHIBITOR TOWARDS CARBON STEEL
ABSTRACT: <br /> <br /> <br /> Corrosion in the pipe causes economical losses for oil companies. Among the several methods of corrosion control and prevention, the use of corrosion inhibitor is very popular. Nowadays, the use of corrosion inhibitor from organic compounds more pref...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/6606 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | ABSTRACT: <br />
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Corrosion in the pipe causes economical losses for oil companies. Among the several methods of corrosion control and prevention, the use of corrosion inhibitor is very popular. Nowadays, the use of corrosion inhibitor from organic compounds more preferably than from inorganic compound. One of the organic compounds which can be used as corrosion inhibitor is the amino acid proline because it has amino group in the pyrrolidine framework and carboxylate groups. To determine the influence of functional groups elongation, amidation reaction was occurred towards amino group using reflux method. Synthesis has been done by mixing proline and acetic anhydride together using ethanol as a solvent. Purification of product has been done by column chromatography using silica gel as stationary phase and ethyl acetate : methanol (1:1) as mobile phase. Characterization of the synthesized products by infrared spectroscopy shows bending vibration of C=O amide at 1,637.56 cm -1. The presence of carboxylate group is indicated by bending vibration of C-O-H at 1,365-1,367 cm -1, stretching vibration of C=O at 1,739-1,740 cm -1, and also by stretching vibration of O-H at 3,404-3,412 cm -1. Characterization by 1H NMR spectroscopy showed chemical shift at 2.21 ppm, 1.41 and 1.42 ppm, 0.84 and 0.87 ppm, 1.21 and 1.39 ppm, also at 1.71 ppm. The physical properties of N-acetyl proline as a product are oily liquid with 0.1749 g mass and 12.43 %. percent yield. The corrosion inhibition activity of proline and the synthesized products at 8 ppm by Tafel method is 11.07 % and 22.19 % respectively. This result showed that the addition of amide carbonyl group could increase corrosion inhibition activity of proline derivative. |
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