Tinning on old PCBs

From: Louis Schulman <louiss_at_gate.net>
Date: Thu Dec 20 18:55:48 2001

On Thu, 20 Dec 2001 02:56:31 -0500 (EST), John Lawson wrote:

# Just a quick (dumb) question: is this 'tinning' silver? Or Green? In
#other words, has the solder itself actually flaked off the trace (meaning
#it never bonded in the first place) or has the 'paint' coating called the
#solder mask, which is usually green, come off, revealing the trace beneath
#it? This very common, and Ethan is right, it should be carefully re-tinned
#to avoid long-term corrosion.
It is the actual solder, indicating it did not bond properly in the first place. There is no green coating on this
PCB, the board and the tinned traces have no coating over them at all.

Received on Thu Dec 20 2001 - 18:55:48 GMT

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