Aluminum and Lead and Tin all have different electrode potentials and will corrode when in direct contact. When not in direct contact, the slightest condensation of atmospheric water forms an electrolyte which then attracts and holds more water due to the increased surface area and surface tension of the resulting corrosion products. This can happen between metals held at the same external potential, i.e. no external potential. Add even the slightest external voltage and now you have and electroplating system.
When we were designing the first cell phones, even the 500-600mV microphone bias on the external connector resulted in the gold plated pins (All pins of the same metal) falling off of the connectors in a matter of weeks. The solution was to ensure that all connector pins were at zero volts by periodically sampling the connector state, lowering the active duty cycles to a fraction of a percent. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/c624e6ec-2124-469f-a102-6adc56704983%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
