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Subject:	Re: connecting aluminum to copper
From:	Brian Ellis <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Thu, 11 Apr 2002 09:20:16 +0300
Content-Type:	text/plain
Parts/Attachments:	text/plain (42 lines)

Phil

I don't recommend any Al (or alloys) to Cu or Sn/Pb junction, where they
are in electrical contact. The electrochemical potential is sufficiently
great that corrosion is inevitable if they got damp, with all sorts of
nasties potentially migrating over the board surface. Al would be OK if
there were no electrical contact.

Brian

Phil Nutting wrote:
>
> Good afternoon TechNet,
>
> Would anyone like to share their knowledge about using an aluminum standoff as a conductor when connecting two circuit boards together.  I suspect that if it were aluminum to copper there would be an issue, but what about aluminum to HASL surface of circuit boards?
>
> Thanks in advance for your wisdom,
>
> Phil Nutting
>
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