Effects of anti-corrosion for high performance of magnesium air fuel cell (MAFC)

• Main Authors: Ahmad, Mismisuraya Meor, Ahmad, Dg Asilah Ag, Basri, Sahriah
• Format: Conference Proceeding
• Language: English
• Subjects: Catechol; Concentration cell corrosion; Corrosion; Corrosion effects; Corrosion prevention; Durability; Electricity; Electrolysis; Electrolytes; Fuel cells; Hydrogen evolution; Magnesium base alloys; Parameters; Performance evaluation; Phosphorus; Precipitates; Sodium chloride; Sodium phosphate; Wastewater treatment
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0114470

Magnesium air fuel cell (MAFC) is a low cost and high energy density fuel cell that applies the electrolysis concept to generate electricity and reduce phosphorus concentration in wastewater treatment. However, corrosion caused by hydrogen evolution rate (HER) and formation of Mg precipitates hinders performance of MAFC. Thus, the effect of anti-corrosion chemicals was analyzed by using two different types, catechol-3, 5-disulfonic acid disodium salt (Tiron) and sodium phosphate (Na3PO4). The anti-corrosion chemical was added to the MAFC where it consists of Mg alloy of AZ series plat (AZ31) as anode, air as cathode and sodium chloride (NaCl) as electrolytes. HER test was employed to analyze the effect of anti-corrosion chemicals where NaCl were varied to 5, 7.5 and 10 wt.%. Based on the HER test analysis, Na3PO4 and 5 wt.% NaCl were showed the suitable parameters where gave the low rate of HER. These parameters were further used to evaluate the performance of MAFC. The durability test and phosphorus concentration reduction analysis were applied to evaluate this performance. The cell showed the durability within 10 days. Meanwhile, the Phosphorus concentration showed reduction with 60.62% of recovery efficiency. Therefore, MAFC is expected to bring a good benefit and new perspective in generating electricity and treating wastewater.