Efisiensi Inhibisi Gum Arabic Terhadap Laju Korosi Baja Karbon Dalam Lingkungan Air Laut
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The corrosion of carbon steel is mainly caused by the seawater environment. The measurement of carbon steel corrosion rate in seawater environment has been done by using gum arabic corrosion inhibitor. The measurement of corrosion rate was done by weight loss method at various concentration of gum arabic (0, 1, 2, 3, 4, and 5% wt) and immersion time (2, 4, 6, 8, 10, and 12 days). The weight loss of carbon steel at various concentration and immersion time was measured by analytical balance. The results show that the rate of corrosion is decreasing with the increase of pomelo peels extract concentration. The corrosion rate is increased with
the elapsed time of immersion. The inhibition efficiencies increase with increasing of gum arabic concentration, which is the maximum of 80.51% at 5 wt% gum arabic concentration and twelve days immersion time. The Langmuir adsorption isotherm fits well with the experimental data that is the mechanism of inhibition follows the Langmuir's adsorption isotherm.
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