Synthesis Poly(succinimide-co-lactic acid) as Corrosion Inhibitor on Carbon Steel in HCl 1 M Saturated with CO2 and CaCO3 Scale Inhibitor
Corrosion and scale formation in both oil and natural gas transportation pipeline network as well as in the cooling water circulation piping system of various industrial processes becomes one of the major problems that could potentially cause a loss of 30% of equipment maintenance costs and industri...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/22593 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Corrosion and scale formation in both oil and natural gas transportation pipeline network as well as in the cooling water circulation piping system of various industrial processes becomes one of the major problems that could potentially cause a loss of 30% of equipment maintenance costs and industrial utilities. In order to inhibit the corrosion rate and the formation of CaCO3 scale on the inner surface of the carbon steel pipe are used biodegradable corrosion and scale inhibitors. In this study, the poly(succinimide-co-lactic acid) compound which is a biodegradable polymer is studied to be an inhibitor of CaCO3 scale and corrosion inhibitor on carbon steel in HCl 1 M with saturated CO2. The compound is synthesized by reaction of the condensation polymerization to the polysuccinimide with (S)-lactic acid using (CH3COO)2Mn.4H2O catalyst. Structure characterization of the syntesized compound through FTIR and 1H-NMR spectroscopy showed that the poly(succinimide-co-lactic acid) compound had been successfully synthesized. The synthesized poly(succinimide-co-lactic acid) compound gave maximum efficiency of corrosion inhibition of 56.35% at a temperature of 40 oC with a concentration of 250 ppm through Electrochemical Impedance Spectroscopy (EIS) measurements and gave maximum corrosion inhibition efficiency of 29.98% at a temperature of 40 oC with a concentration of 250 ppm through a wheel test corrosion. Tafel extrapolation measurements indicated that the compound belonged to a mixed inhibitor which can inhibit anodic or cathodic corrosion. Based on the measurement of the formation CaCO3 scale inhibition, the poly(succinimideco-lactic acid) compound gave a maximum efficiency inhibition of >99% at a concentration of 150 ppm. |
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