Abstract
Aiming to develop a corrosion resistant anode for flue-gas capture and utilization, the effect of SO42− on the corrosion behaviour of nickel was systematically investigated under anodic polarization over a temperature range of 650−800 °C in molten Li2CO3-Na2CO3-K2CO3 with 0–2 mol% SO42−. The corrosion of nickel is profoundly accelerated when the concentration of SO42- is over 0.1 mol% at 650 °C. Pitting corrosion and spallation of NiO film caused by the aggressive SO42− were identified. Interestingly, the resistance of nickel anode to pitting corrosion can be effectively enhanced by increasing electrolyte temperature.
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