Issue link: http://metalfinishing.epubxp.com/i/49721
Table II. Fluoborate Bath Compositions and Operating Parametersa HBF4 (g/L) Tin Bath: Barrel and still: Range Optimum Wire and strip: Range Optimum Lead Barrel and Still Baths: Range Optimum 60 Tin/40 Lead Solder Bath: Barrel and still: Range Optimum High Throw: Range Optimum 90 Tin/10 Lead Barrel and Still Baths: Range Optimum 93 Lead/7 Tin Barrel and Still Baths: Range Optimum 10 Tin/88 Lead/2 Copper Barrel and Still Baths: Range Optimum 188-263 225 225-300 263 15-30 23 98-150 124 350-500 425 150-200 175 15-30 23 20-40 30 30-45 37 45-60 53 — 53-60 56 12-20 16 70-80 75 10-20 15 8-12 10 — — 195-239 218 23-30 26 8-14 11 8-12 10 195-239 217 — — — — — — — 2 As required As required As required As required As required As required As required 135-150 1.5-2.5 As required 143 aAgitation required, mechanical or barrel; vigorous for high-speed plating. Periodic filtration through 1-µm Dynel or polypropylene cartridges. Tanks, pumps, and filters made from polyethylene, polyvinyl chloride (PVC), or Koroseal. Heating and cooling equipment made from Karbate or Teflon. 90-120 (32-49) 90-130 (32-54) 70-100 (21-38) 70-85 (21-29) 70-100 (21-38) 70-100 (21-38) 70-100 (21-38) 70-100 (21-38) 15-25 1-80 20-70 20-70 2:1 1:1 1:1 60 tin/40 lead 90 tin/10 lead 93 lead/7 tin 1:1 10 tin/88/lead/2 copper, or 90 lead/10 tin, or pure lead 1-80 1-300 20-70 25-35 1:1 1:1 1:1 2:1 Pure tin Pure tin Pure lead 60 tin/40 lead Tin (g/L) Lead (g/L) Copper (g/L) Additive Temperature OF (O C) Current Density (A/ft2 Anode to Cathode ) Ratio Anodes 248