Abstract
The effects of Na 2SnO 3, In(OH) 3 and Na 2SnO 3+In(OH) 3 on the properties of Al alloy anode were studied in alkaline medium at 25 °C. The self-corrosion rate of Al alloy anode was studied by method of H 2 immersed in aqueous medium, and the electrochemical properties of Al alloy anode were tested via galvanostatic discharge and dynamic potential methods. The results show that the self-corrosion rate of Al alloy anode in 4 mol/L NaOH+3 mol/L NaAlO 2 medium can be minimized by adding Na 2SnO 3, In(OH) 3 and Na 2SnO 3+ In(OH) 3. Na 2SnO 3, In(OH) 3 and Na 2SnO 3+In(OH) 3 make Al anodic potential shift positively in galvanostatic discharging. The most effective additive of Al alloy anode in 4 mol/L NaOH+3 mol/L NaAlO 2 medium is 0.075 mol/L Na 2SnO 3+0.005 mol/L In(OH) 3, integrating self-corrosion rate and electrochemical properties.
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