Abstract
To confirm the effectiveness of Co and Ni addition to Sn-Ag system lead-free solder on reduction of erosion of iron plating of soldering iron tip, Sn-Ag-Cu-Co(-Ni) system flux cored solder wires were used in operation lines under several manufacturing operation conditions. The temperatures of soldering iron were maintained at about 623–663K. The degree of damage was evaluated by cross sectional measurement of the thickness of Fe plating before and after soldering operation. The obtained data had relatively large scattering, but the Co and Ni addition was found to be effective to suppress erosion damage in all operation lines. Double addition of Co and Ni was also confirmed more effective than single addition of Co.
