Metal Finishing Guide Book

2011-2012 Surface Finishing Guidebook

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Electroplating Process Chemistry for Electronic, Industrial, & Decorative Applications Precious Metals Electronic & Decorative Gold Metallic & Organic Silver Palladium & Pd Alloys (Ni, Co) Acidic & Neutral pH Platinum Mirror-Bright & Stress-Free Rhodium Tin Whisker-Resistant Pure Tin Neutral pH Processes Matte & Bright Tin/Tin Alloys Barrel/Rack & High-Speed Systems Nickel Electronic & Decorative Processes Discoloration Resistant Hi-Throw Formulations Low-Stress Systems RoHS EN Processes (Pb & Cd free) Copper Acid, Cyanide & Pyrophosphate Satin to Mirror Bright Deposits Low-Stress Systems Ancillaries Tarnish-Resistant Post Dips Cleaners & Activators Al Pretreatment Chemistry (401) 781-6100 info@technic.com www.technic.com www.metalfinishing.com/advertisers 213 Table I. Gold and Gold Alloy Flash Baths (Classes A and B) 24K or Gold as potassium gold cyanide (g/L) Free potassium cyanide (g/L) Dipotassium phosphate oz/gal g/L Sodium hydroxide (g/L) Sodium carbonate (g/L) Nickel as potassium nickel cyanide (g/L) Copper as potassium copper cyanide (g/L) Silver as potassium silver cyanide (g/L) Tin (g/L) Temperature (O F) Current density (A/ft2) English 1.25-2 7.5 2 15 — — — — — — 140-160 10-40 Cyanide English Low 1.25-2 7.5 2 15 — — 0.025-1.4 — — — 140-160 10-40 Yellow 1.25-2 7.5 2 15 — — 0.025 0.13 — — Hamilton Colors Pink 1.25-2 2.0 2 15 — — 0.025 1.1 — — 150-160 140-160 10-35 20-50 Green 1.25-2 2.0 2 15 — — 0.025 — 0.05 — 10-40 White No. 1 0.4 15 2 15 — — 1.1 — — — 30-60 White No. 2 0.325 15 2 15 — — — — — 2.1 30-50 Green 2 7.5 2 15 — — — — 0.25 — Pink 0.82 4 2 15 — — 0.2 2.7 — — 30-40 Rose 6 4 — — 15 30 — — — — 140-160 150-160 150-160 130-160 150-160 150-180 10-30 20-50

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