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From: Winston on 23 Jul 2010 11:09
On 7/23/2010 7:48 AM, Jim Yanik wrote:
> Winston<Winston(a)bigbrother.net> wrote in
> news:i2c4hg02lgu(a)news4.newsguy.com:

(...)

>> After cleaning to bare metal and degreasing, I wonder if
>> the contact can be protected with electroless tin plating?
>
> That sounds like a good idea,but how do you get the plating solution to the
> contact without plating other things around it?
>>
>> <http://www.mouser.com/ProductDetail/MG-Chemicals/421-125ML/?qs=sGAEpiMZ
>> ZMtyU1cDF2RqUHvHtsi3Lp2KTMqoiPz0UxQ%3D>

Why would we avoid plating adjacent metal surfaces?

Electroless tin is an amazingly thin coating, so there isn't
any danger of shorting something. Even the small 125 ml
bottle is enough to plate up the contact and any metal
surface nearby, so we aren't concerned that the solution
will be 'thiefed', leaving the contact insufficiently
plated.


--Winston

From: m II on 23 Jul 2010 11:50
Dennis wrote:

> I used water + sodium bicarb (baking powder) + old tooth brush to clean up a
> wireless mouse last week. Seemed to work ok.


I believe that's baking SODA.

Baking 'powder' is some sort of magical substance used by evil witches
to make baked goods for their unsuspecting victims...at least that's
what my wife did...



mike
From: Joe on 23 Jul 2010 16:09
In article <srmdnXYgL9GOJtrRnZ2dnUVZ_gOdnZ2d(a)supernews.com>, "Gary Brown"
<garyjbrown(a)charter.net> wrote:

> Hi,
>
> Some of the batteries in a lamp leaked and made a mess of the
> contacts. The contacts are springs that aren't very accessible
> so abrading off the residue isn't feasible. Is there a solvent
> or other means of removing the residue?
>
> Thanks,
> Gary

Depending on what you mean by "mess of the contacts", it may be as simple
as plain water on a long-ish Q tip to remove the "mess".

========>>>> Tell us what type of batteries leaked. <<<<========

Don't use *any abrasives* until you try plain water first.

In the two alkaline cell leaks that I had to clean up, both cleaned easily
with plain water - nothing else - applied with paper towels or Q-tips.
There was no visible corrosion.

Using baking soda (sodium bicarbonate) solution in water is probably
unnecessary, but shouldn't hurt. Also, be sure to get rid of the traces
of baking soda, too.

--- Joe
From: Winston on 23 Jul 2010 19:30
On 7/23/2010 1:09 PM, Joe wrote:

(...)

> Using baking soda (sodium bicarbonate) solution in water is probably
> unnecessary, but shouldn't hurt.

Both baking soda and Potassium hydroxide are basic, yes?

Wouldn't we want to use an acid to neutralize KOH?

--Winston
From: Jim Yanik on 23 Jul 2010 20:57
Winston <Winston(a)bigbrother.net> wrote in
news:i2d8u00265o(a)news5.newsguy.com:

> On 7/23/2010 1:09 PM, Joe wrote:
>
> (...)
>
>> Using baking soda (sodium bicarbonate) solution in water is probably
>> unnecessary, but shouldn't hurt.
>
> Both baking soda and Potassium hydroxide are basic, yes?
>
> Wouldn't we want to use an acid to neutralize KOH?
>
> --Winston
>

some folks don't recognize the reason for the name "alkaline cell".

They think all batteries have acid in them.

--
Jim Yanik
jyanik
at
localnet
dot com
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