Nasty, but what kind of battery to start with? The chemistry of 
different types can vary enormously.

Inge's advice is probably the safest and surest. Prevention is surely 
better than cure: never keep batteries in equipment longer than the 
"sell-by" date, whether used or not.

If the cleaning is done rapidly after the leak occurs, it should be OK, 
but I would scrap anything that has had more than a week's contact with 
the battery residues. Why remove the chips?

Brian

Anil kher wrote:
> Hi all
> 
>  
> 
> Need advise. This has happenned twice in the last 2 months. The battery
> leaked all over the card (S-M - CNC 45 card no. 45.01.02.3) The m/cs did not
> start the next day.
> 
>  
> 
> If the card is  powered after a few years of storage the battery starts
> leaking and within a few days it is all over the PCB.
> 
>  
> 
> We removed the chips and cleaned in Hot water / air agitn and againa nd
> again. Baked bare card and reloaded chips. NADA. Solvent extarct of bare PCB
> all perfect.
> 
>  
> 
> Advise if we should change all chips - some TTL, some cmos, memory,  eproms,
> etc. 
> 
>  
> 
>  
> 
> Anil
> 
>  
> 
> Micro Interconnexion Pvt. Ltd
> 
> D3-12 A, Corlim Ind. Estate
> 
> Corlim, ILHAS, GOA
> 
> INDIA - 403110
> 
> Tel: +91-832-2284337
> 
> Fax: +91-832-2284209
> 
> alt. E-mail: [log in to unmask]
> 
>  
> 
> LEADERS IN GOLD PLATED PCBs
> 
>  
> 
>  
> 
> 
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