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ELECTROLYSIS 101 for boats that live in the water. - I posted this on another bulletin where a had bonded all his metal with 1" copper straps and needed to test. Copied here for anyone having problems. An ohm meter is a poor way to check bonding I use a 12..

Combining multiple VHFs on single ant - I have a VHF installed in our cabin with only a remote speaker in cockpit. Instead of replacing the unit with a newer VHF with remote mic and/or station options, I would like to simply add another standard VHF radio at the helm and share the antenna..

2 VHFs sharing 1 VHF antenna - I have an Apelco VHF mounted in the nav station with a remote speaker in the cockpit. A Raymarine handheld is kept near the helm. Of course the handheld has nowhere near the range of the fixed VHF below. Instead of replacing the good] Apleco..

2 VHFs sharing 1 VHF antenna - I have an Apelco VHF mounted in the nav station with a remote speaker in the cockpit. A Raymarine handheld is kept near the helm. Of course the handheld has nowhere near the range of the fixed VHF below. Instead of replacing the good] Apleco..

2 VHFs sharing 1 VHF antenna - I have an Apelco VHF mounted in the nav station with a remote speaker in the cockpit. A Raymarine handheld is kept near the helm. Of course the handheld has nowhere near the range of the fixed VHF below. Instead of replacing the good] Apleco..
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Hanz Schmidt

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Since: Jul 03, 2007
Posts: 13



(Msg. 1) Posted: Fri Feb 22, 2008 8:51 am
Post subject: Electrolysis
Archived from groups: rec>boats>electronics (more info?)
What would make a zinc dissolve while at sea?? We have no generator or
inverter.

Would a SSB cause it?

No other boat or land around..


Hanz

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Chuck

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Since: Jan 06, 2008
Posts: 8



(Msg. 2) Posted: Fri Feb 22, 2008 11:46 am
Post subject: Re: Electrolysis [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
On Fri, 22 Feb 2008 08:51:35 -0400, Hanz Schmidt
<hschmidt99 DeleteThis @hotmail.com> wrote:

>What would make a zinc dissolve while at sea?? We have no generator or
>inverter.
>
>Would a SSB cause it?
>
>No other boat or land around..
>
>
>Hanz



I assume you mean that the zinc is eroding too quickly. It is normal
for the zinc to erode as it protects the prop and shaft.

Operating the SSB wouldn't cause accelerated depletion of the zinc.

There are not many factors that can cause accelerated erosion of zinc
at sea. One possibility is that your battery is connected (by an
equipment short or wiring error) so as to make the zinc erode more
rapidly.

Can you provide any additional information?

Chuck

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Larry

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Since: Nov 05, 2005
Posts: 1354



(Msg. 3) Posted: Fri Feb 22, 2008 3:25 pm
Post subject: Re: Electrolysis [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Hanz Schmidt <hschmidt99.TakeThisOut@hotmail.com> wrote in
news:V8KdnWojj8bFWCPanZ2dnUVZ_jydnZ2d@lhtot.com:

> What would make a zinc dissolve while at sea?? We have no generator or
> inverter.
>
A zinc screwed directly to the other metal parts like your prop, forms a
shorted battery with sea water as the electrolyte. The zinc is
CONSTANTLY being eaten away as long as the boat is in its corrosive sea
water bath. At sea, away from the added marina leakages, the temperature
of the bath and varying salinity cause the rate the battery runs, eating
its zinc plate to change.

> Would a SSB cause it?

No, the battery runs quite well 24/7 on its own.
>
> No other boat or land around..
>
Yes, just the acid bath of sea water. It eats all metal it touches.

>
> Hanz
>
>
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BruceM1

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Since: Oct 24, 2003
Posts: 45



(Msg. 4) Posted: Tue Mar 04, 2008 8:28 am
Post subject: Re: Electrolysis [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
seawater?.... Acid?
(Seawater ph is limited to the range 7.5 to 8.4)
7.0 is nuetral. Above is Alkaline, below is Acid.



"Larry" <noone RemoveThis @home.com> wrote in message
news:Xns9A4C6AF27861Cnoonehomecom@208.49.80.253...
> Hanz Schmidt <hschmidt99 RemoveThis @hotmail.com> wrote in
> news:V8KdnWojj8bFWCPanZ2dnUVZ_jydnZ2d@lhtot.com:
>
>> What would make a zinc dissolve while at sea?? We have no generator or
>> inverter.
>>
> A zinc screwed directly to the other metal parts like your prop, forms a
> shorted battery with sea water as the electrolyte. The zinc is
> CONSTANTLY being eaten away as long as the boat is in its corrosive sea
> water bath. At sea, away from the added marina leakages, the temperature
> of the bath and varying salinity cause the rate the battery runs, eating
> its zinc plate to change.
>
>> Would a SSB cause it?
>
> No, the battery runs quite well 24/7 on its own.
>>
>> No other boat or land around..
>>
> Yes, just the acid bath of sea water. It eats all metal it touches.
>
>>
>> Hanz
>>
>>
>
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terry

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Since: Mar 13, 2008
Posts: 4



(Msg. 5) Posted: Fri Mar 14, 2008 7:38 am
Post subject: Re: Electrolysis [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
On Mar 4, 12:58 am, "BruceM" <bruce9950@@hotmail.com> wrote:
> seawater?.... Acid?
>  (Seawater ph is limited to the range 7.5 to 8.4)
> 7.0 is nuetral. Above is Alkaline, below is Acid.
>
> "Larry" <no....RemoveThis@home.com> wrote in message
>
> news:Xns9A4C6AF27861Cnoonehomecom@208.49.80.253...
>
>
>
> > Hanz Schmidt <hschmid....RemoveThis@hotmail.com> wrote in
> >news:V8KdnWojj8bFWCPanZ2dnUVZ_jydnZ2d@lhtot.com:
>
> >> What would make a zinc dissolve while at sea??  We have no generator or
> >> inverter.
>
> > A zinc screwed directly to the other metal parts like your prop, forms a
> > shorted battery with sea water as the electrolyte.  The zinc is
> > CONSTANTLY being eaten away as long as the boat is in its corrosive sea
> > water bath.  At sea, away from the added marina leakages, the temperature
> > of the bath and varying salinity cause the rate the battery runs, eating
> > its zinc plate to change.
>
> >> Would a SSB cause it?
>
> > No, the battery runs quite well 24/7 on its own.
>
> >> No other boat or land around..
>
> > Yes, just the acid bath of sea water.  It eats all metal it touches.
>
> >> Hanz- Hide quoted text -
>
> - Show quoted text -

OK; so it is an alkaline battery; as were the original Le Clanche
cells.
Also regular 'alkaline' batteries have a zinc outer casing, alkaline
contents and a positive carbon centre electrode.
On a boat you have a zinc electrode, alkaline sea water, and the other
electrode is anything metallic etc. connected inside the boat by any
means such as wiring or through equipment etc. is the other
electrode.
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