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Just so you know,if you bring something in from outside in winter you will get condensation until it warms up. That is why back in the vcr days they had a dew sensor on the video heads. It could take up to 4 hours before you could use it.
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
Sent: Sunday, July 31, 2016 12:48 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Preventing oxidation of copper outdoors
Thanks, Brad. I watched the NASA video.
No, Harvey A., my circuit has no glass diodes, or other components that I know to contain glass.
I am glad you mentioned condensation, as I had never thought of
it occuring on my circuit board. Having just defrosted my freezer yester
day, I know it grows quickly on cold surfaces. Since my circuit con-
troller will always be outdoors while in use, I will keep it inside when
not in use, so that condensation doesn't happen. Nonetheless, I will inspect the PCB for condensation when the outdoor temperature drops. The only "spray" the box might be subjected to is rain, which is distilled water. The box will be on my screened-in wooden porch. The porch was built with pressure-treated wood many years ago, but for the past several years moss has been growing on the wood, which should tell you how damp it is. (Another project--re-waterproofing the wooden porch.! Will probably need another recommendation for treating that wood too, but email me privately for that.)
Okay, copper oxidation won't degrade the circuit's performance.
What about tin oxide? Does either Liquid-Tin coating or leaded
solder contain tin? If yes, do you think tin oxide will degrade the circuit's
performance ? Or is too "self-limiting" and of no consequence?
I am not sure what you meant by the "Polyurethane wood polish" you recommend. I am trying to identify a furniture polish containing polyurethane. So far, I am only finding furniture polishes designed for wood furniture that has a top coat of polyurethane, like the one on your local tavern's wooden bar top. I'm not sure whether to look for a furniture polish that was designed to be applied to a polyurethane top coat, or that actually contains polyurethane a! s listed in the ingredients. Or are they one and the same? As you can tell, I am pretty much ignorant about this product. I am guessing its purpose is to fill in surface scratches on a polyurethane top coat.
73 to all.