Study characteristics of biodiesel for maritime use

Abstract

Aluminium is an important subject of research because it is abundant in nature easy to handle. Nowadays, corrosion is entrenched in maritime industry where the ship plate undergoes corrosion and it depends on the different environment. 1bis study investigates the inhibition performance of henna towards AA5083 in seawater. The characterization of the corrosion was performed by using fourier transform infrared spectroscopy (FTIR), weight loss, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PP), and scanning electron microscope (SEM). The inhibition efficiencies (IE%) for all measurement obtained from different method; weight loss, polarization resistance (Rp), corrosion current density Ucorr) and corrosion rate are in good agreement where the highest inhibition efficiencies (IE%) is 83.84% at 500ppm after 60 days of immersion. The value for charge transfer resistance (Re,) increase as a result of increasing in the degree of protection of AA5083 in test solution and double layer capacitance ( Cd1) decrease indicates that a layer was form indicating the formation of a surface film. 1bis reflects the inhibitor does retard the corrosion rate. 1bis research had found that henna is an excellent natural inhibitor for aluminum alloy in seawater.