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Subject:	Re: Lead free soldered products in S- containing atmosphere
From:	Bob Willis <[log in to unmask]>
Reply To:	(Leadfree Electronics Assembly Forum)
Date:	Tue, 14 Sep 2004 12:41:34 +0000
Content-Type:	text/plain
Parts/Attachments:	text/plain (47 lines)

No I am not aware of any but yes I have still seen attack "black spots" on
chip resistors between the resistive element. Its a nice failure mode.

On 9/14/2004, "Zweigart, Siegmund" <[log in to unmask]> wrote:

>Hello all
>
>I got an interesting question:
>What will happen in the lead free world with products which have to be
>tested in S- containing atmosphere in regard to corrosion?
>Pb is known to prevent corrosive effects, but now we will have Ag in solder
>joints which reacts quite easy with S.
>Did anybody know of any studies in regard to that topic?
>
>
>Best regards
>
>Siggi
>
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Bob Willis
2 Fourth Ave, Chelmsford
Essex, CM1 4HA England
Tel +44 01245 351502
Fax +44 01245 496123
Web www.leadfreesoldering.com 

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