Elaine,
would do nothing before I knew what's under the surface. ENIG boards vary by 
quality. you need touch up, which tells me there is a problem with the 
finish. If you speak about very extensive batches, I would start with a 
analysis of the kind that gives a view of the in-depth status, e.g. the P 
%age, finish thickness,, contaminations, micro hardness etc. From that, you 
can work safer. If it's only about a single or few boards, you may just go 
on with stronger flux, increased dwell time and  a nmber of  other well 
known actions. you wsill get lots of proposals.

Inge



----- Original Message ----- 
From: "Brown, Elaine" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, February 24, 2010 1:19 PM
Subject: [TN] Touch up on ENIG


> What do folks do to rework exposed nickel on ENIG unpopulated boards?
>
> I find brush plating for tab plating but nothing for ENIG.
>
> Thanks in advance
>
> Elaine
>
>
> Elaine Brown
> PWB Quality Engineering
> Lockheed Martin Systems Integration - Owego
> 1801 State Route 17C  MD0409
> Owego, NY  13827
> Phone:  607-751-2015   FAX: 607-751-7796
> e-mail:  [log in to unmask]
>
>
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