Electrodeposition of Sn-Ag-Cu ternary alloy from HEDTA electrolytes

► Sn-Ag-Cu ternary alloy deposits were prepared by electrodeposition. ► HEDTA was developed as an effective complexing agent for the electrodeposition of Sn-Ag-Cu alloy. ► Alkylpolyglucoside was found to be an additive suitable for the electrodeposition of Sn-Ag-Cu alloy. ► The effects of complexing agents and additive were investigated by LSV, EIS, XRD and SEM.