Patent ID: 8920623

Claim:
A method comprising: a) providing an electrolytic cell comprising an insoluble anode and a cathode; b) introducing a composition comprising one or more sources of stannous ions and one or more sources of silver ions, free acid in amounts of 0.05 g/L to 5 g/L one or more acid electrolytes or salts thereof into the electrolytic cell; c) electrically connecting the insoluble anode and the cathode and generating a current flow at a current density effective to deposit tin/silver alloy on the cathode; and increasing the free acid concentration of the composition; d) removing a predetermined amount of the composition comprising the increased free acid from the electrolytic cell by flowing the predetermined amount of the composition comprising the increased free acid concentration to a reservoir in fluid communication to the electrolytic cell; e) adding a predetermined amount of a solution, formed by the addition of stannous oxide in amounts of 5 g/L to 100 g/L, so as to provide tin ions and one or more sources of silver ions to provide silver ions in amounts of 0.01 g/L to 10 g/L to the composition comprising the increased free acid concentration in the reservoir to form a mixture; and f) feeding the mixture into the electrolytic cell.