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Re: Tinning Boards

 

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Tinning is nice but not all that necessary, cleaning the copper before soldering and then spraying clear enamel (or whatever paint you have closest) over it should suffice for most things.

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Your flux should take care of any minor oxidation, but it doesn¡¯t take long to give the board a quick clean.

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Nail polish should work (more effort than paint), but I did come across this the other day:

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Interesting.? Maybe his clear polish wasn¡¯t UV stable or something.

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It¡¯s a common trick to use red nail polish on equipment to make marks stand out, eg on my bike I painted the brake wear indicator arrows to make them visible.? Years later and they¡¯re still there, so who knows.? I doubt there are many studies in the use of nail polish in industrial settings.

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Tony

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From: [email protected] [mailto:[email protected]] On Behalf Of Rob via Groups.Io
Sent: Tuesday, 16 April 2019 2:51 PM
To: [email protected]
Subject: Re: [homebrewpcbs] Tinning Boards

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IS plain enamel nail polish sufficient to prevent oxidation?

Re:After all we need to prevent oxidation of copper surface.

and
just curious.... how long can a PCB project? be left unprotected and unbuilt?
and
if the copper does oxidize....
do we really care.... if a quick sand paper scrub makes it shiny again?








On 04/16/2019 12:45 AM, MVS Sarma wrote:

Yes Peter,

?things are getting costly. If we can access any tin rod or a lump, perhaps we can try tin electro plating. The industry adopts roller tinning but at home , it nay not be feasible.

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Cheapest appears tobe, some protective smear that could break thro and allow soldering.? This coat could be applied even after populating rhe board, and only limitation is that we need to assemble immediately.

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After all we need to prevent oxidisation of copper surface.?

Regards

Satma? ? vu3zmv

On Tue, 16 Apr 2019, 6:10 am Peter Ayearst <ve3poa@... wrote:

I know its being a while since I bought liquid tin, but it seems to be quite expensive these days. Is there a less expensive alternative out there? What does everyone else do? Tin or leave the copper bare?

thanks Peter
ve3poa

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