The performance of Al-Zn-In-Mg-Ti sacrificial anode in simulated deep water environment

The corrosion behaviour and working performance of Al-Zn-In-Mg-Ti sacrificial anode were studied in simulated deep water environment using potentiodynamic polarization, electrochemical impedance spectroscopy, self-discharge, gravimetric and imaging measurements. The results indicate that the corrosion of Al-Zn-In-Mg-Ti is accelerated which is due essentially to acceleration of the cathodic process, and the efficiency of Al-Zn-In-Mg-Ti sacrificial anode drops dramatically in deep water which is related to increased loss in weight and decreased discharge capacity. The corresponding cathodic protection design parameters of steel as calculate, show that at least 22% more Al-Zn-In-Mg-Ti anode should be required in deep water environment. (C) 2013 Elsevier Ltd. All rights reserved.