Corrosion inhibition of copper by Acoruscalamusas green corrosion inhibitor in ۳ wt% NaCl solution

چکیده مقاله

With witnessing the increase of marine industry, copper and its alloys are widely used in many marine-relative environments and engineering applications owing to their excellent properties, such as electrical and thermal conductivity, mechanical workability and its relatively noble properties. However, in the presence of the neutral chloride media, they are much susceptible to corrosion, leading to enormous economic losses and many potential safety problems. One of the most efficient approaches for protecting copper against aggressive attack is the use of the natural organic compounds to form tight films which contain electronegative functional groups and p-electron in triple or conjugated double bonds [1–4]. The adsorption and corrosion protection effect of Acoruscalamus(AC) on the copper surface in 3 wt% NaCl solution was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Polarization curves indicate that AC is a mixed inhibitor, affecting both cathodic and anodic corrosion currents. The inhibition efficiency of AC reached 98% at an optimized condition.