The effects of triethanolamine (TEA) and polyethylene glycol 600 (PEG600) on the polarisation behaviour and composition of electrodeposited eutectic Sn–3·5Ag film were systematically investigated in order to widen the deposition current density range for the simplicity and potential for cost effective production. The addition of TEA to the bath with PEG600 increased the tin deposition, which was inhibited by PEG600 addition. The addition of both TEA and PEG600 helped to obtain dense and fine grained Sn–Ag alloy films and also widened the operating window.
