The effect of Alloying Elements to produce optimize aluminum sacrificial Anode

In the present work, the effects of alloying elements such as Mn and Mg on the potential and current capacity of Al-Zn- In anodes have been investigated. In order to prepare the samples, appropriate amounts of Mn (0.01, 0.05, 0.1, 0.15, 0.2, 0.3 wt.%) and Mg (0.5, 1, 1.5, 2, 2.5, 3 wt.%) was used. The alloying process was performed at 750 oC. Electrochemical polarization and NACE standard methods were used to evaluate the anodic behavior, potential and current capacity of the anodes. It was found that addition of the 0.15 wt.% Mn and 2 wt.% Mg to the base alloy cause increasing efficiency up to 83 %. Under these conditions, corrosion and consumption of anode is homogeneous.