Pengaruh Penambahan Inhibitor Ekstrak Tembakau Terhadap Laju Korosi Internal Pipa API 5L X-52 Pada Artificial Brine Water Dengan Injeksi Gas CO2 [Effect of Addition of Extracted Tobacco Inhibitor to The Corrosion Rate of Internal Steel Pipe API 5L X-52 in Artificial Brine Water With CO2 Gas Injection]
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Abstract
Crude oil containing brine water with high concentration of NaCl and HCO3 and the presence of dissolved CO2 gas may increase the potential for corrosion in the pipeline. The use of natural corrosion inhibitor is one of the alternative to solve these problem. Natural materials were chosen as an alternative because it is safe, readily available, biodegradable, low cost, and environmentally friendly. This study was conducted to determine the effect of tobacco extracts on the rate of corrosion and inhibition efficiency. The novelty of this research is a continuous injection of CO2 gas that does not exist in previous research. Spectroscopy analysis was conducted to determine the chemical composition of samples of steel API 5L X-52, TLC densitometry was used to determine the levels of nicotine in tobacco sauce. Gamry Potensiostat Type 6:25 was used for testing the corrosion behavior, using the Tafel polarization and EIS methods. The results show that, the corrosion rate of samples decreased with the addition of tobacco extracts. The addition of 60 ppm of tobacco extract in a solution decrease corrosion rate samples at 8.95 mpy in ABW 1 and 9.87 mpy in ABW 2. Optimum inhibition efficiency occurs upon the addition of 60 ppm tobacco extracts, for the solution of ABW 1 by 79.51% and amounted to 80.94% ABW 2. The inhibition efficiency began to decline by the addition of 80 ppm, to 42.32% in ABW 1 by and 68.71% in ABW 2.
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