Re: corrosion in battery charger

From: Robert Baer (robertbaer_at_earthlink.net)
Date: 07/30/04 

Date: Fri, 30 Jul 2004 07:04:42 GMT

KellyClarksonTV wrote:
>
> I've notice black stains in the charge contacts in my battery charger appear
> from time to time. They are easy to clean off, but I'd like to know why that
> happens. Thanks.

  Most small cells ("batteries") that are charged, use an alkaline-based
paste for the electrolyte.
  Overcharging builds up pressure insiide, and a small amount leaks out
- mostly in gaseous form.
  Most metals corrode in such surroundings - take the case of corrosion
near saltwater...