Hola amigo; quizás no está una cosa de c. I have seen lots of cases where
you have misjudged intermetallic formations and taken them for corrosion.
Typical example is the much discussed ' purple plague ' . So, before
anything else you should have a look at the object in a high magnification
optical microscope, or even better, a SEM. I'll  see if I can find pictures
from my old reports.

By the way, Dave, I have not forgotten your question about the Metal
Institute report. They have changed business and this antique report has to
be looked for in the deepest cellars.

Inge

On 29 February 2012 15:53, Victor Hernandez <[log in to unmask]>wrote:

> Fellow TechNetters;
>
>   Do No Clean LF fluxes, Rosin Core/molten solder, have a corrosive ion?
> Every so often when conducting analysis on Field Return Product I notice
> small amount of corrosion product on gold plated contact on DIMM and PCI
> Slot connector.   Sometimes on other gold plated connector leads.   So I am
> trying to understand which component had a corrosive ion waiting for the
> right conditions to flourish.   Small amount of greenish/bluish residue.
> It can be seen on wipe zone and/or stamp edge of contact.   Where is this
> active corrosive ion coming from?
>
>   Can someone provide the link to Stevezea home page for posting pictures?
>
> Victor,
>
>
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