Tin plating is most commonly used for electrical components and materials that require soldering. There are several tin alloy plating systems and several conventional pure tin systems available. When selecting a tin plating system, consider the following:
- Type of tin – pure tin or tin alloy (tin-lead, tin-bismuth, tin-zinc)
- Appearance – bright, matte or satin
- Electrolyte – sulfuric acid, methane sulfonic acid (MSA), alkaline
- Plating Mechanism – rack or barrel or both
- Part Configuration – types of parts and application
PavBrite Sn is a two-component bright acid tin-plating process that produces a brilliant, level tin electro-deposit, which exhibits excellent solderability. PavBrite Sn baths, which require low tin levels, are extremely economical to operate. The control of the bath is simple because of the need for only one brightener additive. PavBrite Sn will provide a brilliant, corrosion resistant, level deposit over a wide current density range.
PavMatte Sn is a stable leveling matte acid-tin plating process that produces a soft white to gray matte finish, exhibiting excellent solderability. Baths operate over a wide concentration range permitting highly economical deposition. Baths are maintained with two additives which are not consumed during electroplating. However, the additives are lost via drag-out. The additives are stable, so organics are minimally co-deposited with the tin. The PavMatte Sn process is extremely simple to control, requiring only a fraction of the lab analysis time needed by competitive systems.
The STARGLO BIS-TIN is an extremely solderable lead free plating process that creates a fine-grained, satin-like Tin-Bismuth deposit.
It produces a nominal 95/5 Tin-Bismuth alloy that virtually eliminates latent Tin whiskering, problematic to all 100% tin electroplated deposits. The process operates with a single proprietary liquid is used for both, new bath make-up and normal replenishment, allowing for a lower total number of additives in a job shop environment. Small additions of STARGLO Anti-Ox are suggested though, in order to retard the build-up of stannic tin in the operating baths.
Volta™ is Pavco’s tin-zinc electroplating process. Volta™ produces a tin/zinc deposit containing 70% tin and 30% zinc which exhibits excellent solderability and chromate receptivity. Deposits from the Volta™ process provide superior corrosion resistance versus conventional electroplated zinc.