Corrosion is a fundamental process which plays
an important role in economics and safety.
Apparently, corrosion cannot be avoided, but its severity can be
prevented. Inhibitors have always been considered to be the first line
of defense against corrosion. Several corrosion
inhibitors are available today. The objective of this study was to
evaluate the effectiveness of sodium benzoate as an inhibitor
to slow down or prevent corrosion. This project involves the
use of gravimetric measurements, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) to evaluate inhibitive action of sodium benzoate on corrosion behavior of
AA6063 aluminium alloy in seawater. The electrochemical measurements showed that the presence of sodium benzoate as an inhibitor significantly decrease the weight loss, corrosion
current densities (icorr), corrosion rates and double layer capacitance (Cd), whilst increasing the polarization resistance (Rp).
