Exploring the inhibition effect of tri-sodium phosphate concentrations on corrosion in Mg-sn-ca-mn anode for magnesium batteries

Abstract

ABSTRACT The corrosion of magnesium (Mg) alloy anodes poses a significant challenge in the development of magnesium-based batteries. In this study, the inhibition effect of different concentrations of TSP in sodium chloride (NaCl) solution on the corrosion behaviour of Mg alloy anodes in magnesium batteries was investigated. The immersion periods were varied to assess the long-term efficacy of TSP as a corrosion inhibitor. Tafel polarisation analysis revealed a shift in corrosion potential towards more noble values with increasing TSP concentration, indicating enhanced corrosion resistance. EIS measurements provided insights into the changes in charge transfer resistance and double-layer capacitance, corroborating the protective effect of TSP against corrosion. Furthermore, CV and LSV analyses elucidated the dynamic corrosion processes and confirmed the efficacy of TSP as a corrosion inhibitor. This study comprehensively investigates the inhibition mechanism of TSP on the corrosion behaviour of Mg alloy anodes in magnesium batteries.