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Old 29 December 2003, 15:38   #1
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Anodes

Hi folks

I have just swapped the props on my RIB and decided the anodes need replacing.

While they are not expensive it is a real pain to swap them not having a trailer.

Given the life span is a function of the amount of zine present, would their be any benefit in having a couple of hanging anodes, connected to the others of course, just in the water near the fixed ones. These could be remoned when in use.

I know that one of the fixed anodes is connected to the drive ground but not sure about the ones on the trim rams.

Would this increase the life of the fixed ones ?, also would this effect the mercathode fitted.



All the best for the new year, Gary
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Old 30 December 2003, 09:12   #2
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Re: Anodes

Quote:
Originally posted by Garygee

Given the life span is a function of the amount of zine present, would their be any benefit in having a couple of hanging anodes, connected to the others of course, just in the water near the fixed ones. These could be remoned when in use.

I know that one of the fixed anodes is connected to the drive ground but not sure about the ones on the trim rams.

Would this increase the life of the fixed ones ?, also would this effect the mercathode fitted.


All the best for the new year, Gary
As long as the hanging anodes are close to drive and properly grounded they will still work.

Because the drive itself is grounded via various earth leads all the anodes bolted to the drive are also grounded (so long as the bolts haven't been overgreased or painted in any way.

It will probably help to prolong the life of the fixed anodes, but due to there location in direct contact with the Aluminum they will still erode quicker thn the hanging ones.
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Old 31 December 2003, 10:23   #3
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Gary have a chat with these people, they are also cheaper than the normal Mercury/Yam/Suz parts.

Pete

http://www.mgduff.co.uk/
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Old 31 December 2003, 15:49   #4
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anodes

http://rib.net/forum/showthread.php?...ghlight=anodes
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Old 01 January 2004, 08:29   #5
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Thanks folks

Tried to give zincsmart a ring but must be closed for Christmas.

Will order a couple of big (cheap) anodes and suppliment the fixed ones. If it gives me a extra few monthson the fixed ones, it will be worth it as I could errode the free ones down to nothing.

Also does 9 months sound right for anodes, with a mercathode fitted ?. What are other people getting.

I know it is enviroment dependant but at present I have no idea if 9 months is average or not.


Thanks Gary
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Old 02 January 2004, 20:01   #6
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Gary, I have doubled the size of the original anodes because the life would have been 3-4 months. However, south coast mooring, with power cables in the jetties and water nearby

Your not using S/S props are you ?

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Old 03 January 2004, 06:59   #7
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Quote:
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Your not using S/S props are you ?
Does this make a differece?

Anyone know anything about freshwater anodes? Apparently they are different and corrode very quickly in the Sea.
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Old 03 January 2004, 07:09   #8
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Hi folks

Yes their is two stainless props (Contra-rotaring), plus a stainless shower unit.

The anodes are Zinc, I think freswater ones are magnesium.

Its the short life when used with the mercathode I am supprised at. I was hoping that the anodes would have been almost a backup, with little errosion when the mercathode was working.

Regards Gary
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Old 03 January 2004, 07:19   #9
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Quote:
Originally posted by Garygee
....with little errosion when the mercathode was working.

Regards Gary

Er, is it working, Gary?
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Old 03 January 2004, 10:41   #10
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Not sure to be honest and dont know how to tell.

Was hoping I could get some idea ho long other peoples anodes are lasting, with & without Mercathode.

Plan to have a chat with Barrus on Monday and see what they say.

Regards Gary
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