Re: [DML] Stainless in coolant system

["Tom Niemczewski" <dmctom@xxxxxxxxx>]

Marc

I don't think that this is the case. Of course I might be wrong...
Two metals with fluid between them creates a very crude battery. Factory 
made battery is the same thing, it just uses metals and fluids that are 
better for the task. Shorting the two electrodes does not stop the reaction 
in the battery... it causes exactly the opposite. It speeds up the process 
to the maximum. Everyone knows what happens if you short the battery 
terminals - sparks, lots of current and the battery gets hot. The reaction 
will continue at maximum speed until the chemicals neutralize.
I believe that shorting the SS part of the system with aluminum part of the 
system will speed the reaction up significantly. Of course before the 
reaction can neutralize the different metals in the system you will end up 
with a hole somewhere. No problem if the reaction attacks one of the 
aluminum pipes close to the overflow bottle - you can replace that part 
easily. If it decides to attack the engine block..... you're in trouble.

Just my opinion

Tom Niemczewski
vin 6149 (in Poland!)
Google earth: 52°25'17.30"N 21° 1'58.00"E
dmctom@xxxxxxxxx
www.deloreana.com




----- Original Message ----- 
From: "Marc Levy" <malevy_nj@xxxxxxxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Tuesday, July 29, 2008 3:29 AM
Subject: Re: [DML] Stainless in coolant system


> If I understand the science behind this (and I am not sure I do), the 
> problem is that a battery is created because of the dissimilar metals 
> being separated by the liquid.  So, the "Potential Difference" (or 
> Voltage) created between the Aluminum and Stainless is what causes damage 
> to the Aluminum (the weaker metal).
>
> Assuming what I wrote above is correct, a wire between the SS bottle and 
> aluminum engine would "short" the battery out...  so there would be a 
> potential difference of zero...  But, would that stop the damage to the 
> Aluminum?
>
> Maybe someone who understands this can explain it better.  :)
>
>
>
> --- On Mon, 7/28/08, Martin Gutkowski <martin@xxxxxxxxxxxxxx> wrote:
>
>
> Hi Marc
>
> I genuinely do not know the answer to this one, I just found that
> article and deemed it relevant. However it makes sense to me that a
> ground wire might make the situation worse, because you're then
> providing a short curcuit to the "battery" created between the stainless
> bottle and the aluminium block.
>
> Martin
>
>
>
>
>
>
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