Temperature Effects toward Corrosion Rate of Carbon and Mild Steel Using Red Palm Oil as Natural Corrosion Inhibitor

Red palm oil was studied as a corrosion inhibitor for mild and carbon steel in an acidicmedium atdifferent temperatures. It was shownthat the steel weight loss was directlyproportional to the increaseof temperature. Mild steellostabout 1.34 mg of weight at 25°Cand reached a maximum weight loss at 60°C was 2.41 mg. Carbon steel underwent about 1.41mg weight loss (25°C) until 2.47 mg (60°C). The rate of corrosion was also increased as thetemperature increased. The maximum corrosion rate for both mild and carbon steel at 60°Cwas15.71 mpy and 16.10 mpy,respectively. The maximum rate of corrosioninhibitorefficiency for mild and carbon steel was found to be 91.1% and 80.1% at 25°C. The percentageof corrosion inhibitor efficiency gradually decreased when the temperature increased. SEM-EDX results showed both surfaces of mild and carbon steel weresmoothed and no holes at25°C. However, at 60°C corrosion effect occurred on the surface of bothtypes ofsteel. Basedon the percentage of chlorine, oxygen,and ferum atom mass, the oxidation and corrosionimpacts were lower for mild steel compared to carbon steel.