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01 October 2008, 18:35
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#1
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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Odd anode damage.
Anyone seen anything like this before? There's practically no fur on the anode but it looks like someone's been shooting it. It's on my motor-been like it for a while but only just took a pic.
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01 October 2008, 18:51
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#2
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Member
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
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could it have had copper slip lubricant used on it at sometime .or been stood touching a damp coil of rope thats been in sea water or a prop bag,
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01 October 2008, 18:57
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#3
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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Quote:
Originally Posted by m chappelow
could it have had copper slip lubricant used on it at sometime .or been stood touching a damp coil of rope thats been in sea water or a prop bag,
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No evidence of coppaslip anywhere on the motor, and I don't know about the rest but certainly not in the last 2 years.
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01 October 2008, 19:05
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#4
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Member
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
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how about electrical leakage from somewhere on the engine ,or a redundent wire passing current and touching the casing ,.at least its doing its job its better corroding on the anode than the gear box .
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01 October 2008, 19:06
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#5
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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Quote:
Originally Posted by m chappelow
how about electrical leakage from somewhere on the engine ,or a redundent wire passing current and touching the casing ,.
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Nothing like that either!
I wondered if it was a dodgy anode but Doggypaddle's 80 Yam is the same.
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01 October 2008, 19:23
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#6
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Often, if there is impurity within the metal, a small cell is produced between the impurity and the parent metal. Corrosion is obviously greater by galvanic activity in the region of the impurity. It can inadvertently be caused by scrubbing the anode clean using a wire brush.
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JW.
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01 October 2008, 19:43
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#7
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Member
Country: UK - Wales
Town: Here
Boat name: doggypaddle
Make: Avon 5.4 Searider
Length: 5m +
Engine: yamaha 80
Join Date: Jul 2007
Posts: 1,107
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Quote:
Originally Posted by jwalker
Often, if there is impurity within the metal, a small cell is produced between the impurity and the parent metal. Corrosion is obviously greater by galvanic activity in the region of the impurity. It can inadvertently be caused by scrubbing the anode clean using a wire brush.
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That would make sense, the other thing i thought was possibly oil on the anode reducing the effective active surface area?
anyway at least our anodes are dissolving not the engine which would probably be the case if they were suzuki of similar vintage!
whats the other anode look like on your engine Nos?
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01 October 2008, 20:10
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#8
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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Quote:
Originally Posted by doggypaddle
That would make sense, the other thing i thought was possibly oil on the anode reducing the effective active surface area?
anyway at least our anodes are dissolving not the engine which would probably be the case if they were suzuki of similar vintage!
whats the other anode look like on your engine Nos?
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Normal mate, slightly furry.
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01 October 2008, 20:25
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#9
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Member
Country: UK - Wales
Town: Here
Boat name: doggypaddle
Make: Avon 5.4 Searider
Length: 5m +
Engine: yamaha 80
Join Date: Jul 2007
Posts: 1,107
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Quote:
Originally Posted by Nos4r2
Normal mate, slightly furry.
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Mines not bad either, certainly not wormholed like the main one.
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01 October 2008, 21:48
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#10
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Member
Country: UK - England
Town: Cowes
Boat name: if only you knew!
Make: n/a
Length: 10m +
Engine: large
Join Date: May 2007
Posts: 228
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nos - is the rib engine left in the water on a mooring in a marina / swinging or do you keep it out? how long has the anode been immersed in the location to which the anode is eaten?
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01 October 2008, 21:50
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#11
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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it's trailered. Longest it's been in this year has been 2 weeks, anode kept submerged.
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01 October 2008, 21:55
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#12
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Member
Country: UK - England
Town: Cowes
Boat name: if only you knew!
Make: n/a
Length: 10m +
Engine: large
Join Date: May 2007
Posts: 228
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is the anode an orignal OEM part or is it a patent part?
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01 October 2008, 21:57
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#13
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Member
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
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Defects in the zinc. Although I'm guessing you stored it in the water for awhile? That's not typical wear for a boat on a trailer.
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01 October 2008, 22:13
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#14
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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OEM I think. There's no evidence of the engine being stored in the water for a while at all.
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01 October 2008, 22:39
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#15
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Member
Country: UK - England
Town: Cowes
Boat name: if only you knew!
Make: n/a
Length: 10m +
Engine: large
Join Date: May 2007
Posts: 228
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it looks fairly typical and not something i would be at all concerned about - some anodes get eaten fairly quickly and exactly the way your phots show
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02 October 2008, 06:01
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#16
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Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
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Off topic, but I'd suspect some moose hunter...
Normal wear for an anode is less focused, and more, well, spongelike.
I'd hit up the marina where you had the boat in the water and ask them to check for currents in the water from other boats nearby.
jky
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02 October 2008, 07:37
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#17
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
|
Quote:
Originally Posted by jyasaki
Off topic, but I'd suspect some moose hunter...
Normal wear for an anode is less focused, and more, well, spongelike.
I'd hit up the marina where you had the boat in the water and ask them to check for currents in the water from other boats nearby.
jky
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It's never been in a marina and there's no shore power to the pontoons it's been tied up to...
Confusing isn't it!
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02 October 2008, 07:43
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#18
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Member
Country: Other
Town: Labutes City
Make: bombard
Length: 3m +
Engine: Yamaha 25
Join Date: Aug 2008
Posts: 15
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Hello
How much stainless do you have on your boat? Especially submerged or toching the water?
How often do you change you anodes?
Stainless steel is often a cause for extreme wear on anodes and galvanic corrosion around the motor.
Cumps
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02 October 2008, 07:52
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#19
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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Hardly any. There's a stainless disc covering the flooding hull hole,but the damage was there before I put that on and it's not accelerated it.
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02 October 2008, 12:51
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#20
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Member
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
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Has it been chipped by stones when its being towed ??????? OK not really a sensible suggestion , but the first one that came to me ! It COULD be , but probably not......
Not sure how this would affect an anode.
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