Me vs NiCad battery damage on PC boards

Dwight Elvey dwight.elvey at amd.com
Wed Feb 1 14:31:55 CST 2006


Hi
 As a note, Muriatic acid is hydrochloric acid.
Dwight

>From: "Marvin Johnston" <marvin at rain.org>
>
>
>When cleaning PC Boards that have had battery leakage, I always use
>Muriatic Acid (about 33% Hydrochloric Acid) also known as pool acid for
>adjusting pool pH. When I still owned the Printed Circuit shop, I would
>use something called Solder Brite to remove the oxidation on the boards
>after etching and prior to reflow. If you have a PC shop close by, you
>might stop by and see if they would give you a couple of ounces to try.
>IIRC, Solder Brite was basically Muriatic acid with some additives.
>
>BTW, when I am cleaning up the crud on PC boards, I only use a couple of
>*drops* of Muriatic acid and I would guess that Solder Brite could be
>used the same way. Once it stops foaming, I am done :).
>
>> From: "Tim  Shoppa" <tshoppa at wmata.com>
>
>> But is there some magic chemical or mechanical means that will render 
>> the existing cruddy PC board solderable so I can replace these flaky 
>> sockets? 
>> 
>> Tim.





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