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Rudder post corrosion |
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Rock 
Commadore 
Joined: 19 September 2014 Location: Netherlands Status: Offline Points: 404 |
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 Posted: 24 August 2015 at 21:36 |
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Paul, per previous discussions, yours is probably a grounding plate, not an sacrificial anode. Peter
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Hanse 400e "M-square2" #0241
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High Time
Vice Admiral 
Joined: 04 September 2012 Location: Portsmouth UK Status: Offline Points: 819 |
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Posted: 24 August 2015 at 22:22 |
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Paul
I have the Volvo engine and haven't got a hull anode on High Time. I haven't specifically checked (yet!) if the rudder post is grounded but I don't think it is. I do know that the keel is grounded and there is a small voltage that I measured some weeks ago between the boat 'earth' and the rudder post. I started a thread about this at the time (see http://www.myhanse.com/rudder-post-voltage_topic8997.html ) but didn't reach any conclusion. Is your keel grounded? If it is, you will see a green/yellow wire connected to the keel if you lift the flap in the floor nearest the table. If your rudder stock is also earthed then you have 2 dissimilar metals (keel and rudder stock) immersed in seawater i.e. a battery which will result in electrolytic corrosion. Edited by High Time - 24 August 2015 at 22:26 |
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Roger
High Time (415 #038) |
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skipper
Vice Admiral
Joined: 16 February 2008 Location: Sweden Status: Offline Points: 825 |
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Posted: 25 August 2015 at 08:19 |
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Have you searched for old threads?
Xantos wrote something about a Technical Dealer Bulletin that could be if interest http://www.myhanse.com/corrosion-on-propellor_topic6677_page2.html "Remove ground cable" (yellow/green). Edited by skipper - 25 August 2015 at 08:20 |
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Cheers,
Skipper Former owner of Hanse 342 2005 (Sparcraft mast, white hull, wheel steering, deep draft keel, short rudder) |
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415 Singapore
Vice Admiral
Joined: 23 September 2013 Location: Singapore Status: Offline Points: 935 |
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Posted: 07 September 2015 at 13:36 |
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Hi Skipper thanks for the response, seems very strange that the Hanse technical bulletin seriously pre-dates the construction of our boat!! We removed the earth from the the rudder post last weekend, following Hanse's recent confirmation via our agent that this was the correct thing to do. There was some minor corrosion under the earth wire connection, but will have to wait and see how the rudder post looks when we take her out of the water.
Many thanks Paul |
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Paul - Night Train - 415 #136
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jefa
Lieutenant 
Joined: 01 December 2008 Location: Netherlands Status: Offline Points: 34 |
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Posted: 22 October 2015 at 09:05 |
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I am sorry, but I have been asked to take away my postings. By this.
Edited by jefa - 02 December 2015 at 14:05 |
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Armin Geisler
Sales Director Jefa Rudder & Steering |
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StavrosNZ
Rear Admiral 
Joined: 24 October 2014 Location: New Zealand Status: Offline Points: 581 |
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Posted: 22 October 2015 at 21:26 |
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Armin,
Nice to hear from Jefa on this subject, can you please also advise other owners on what you would recommend on other models regarding the bonding of rudder shaft? I have 2010 Hanse 400 with aluminium Jefa rudder, the shat is bonded along with engine and keel to an anode on the hull. Do you suggest disconnecting the earth wire from the rudder post also? and if so what then is the point of the hull anode as sail drive anode will sacrifice first in every instance? |
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Stephen
2010 H400 #691, Auckland, New Zealand |
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jefa
Lieutenant
Joined: 01 December 2008 Location: Netherlands Status: Offline Points: 34 |
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Posted: 23 October 2015 at 10:34 |
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I am sorry, but I have been asked to take away my posting. By this.
Edited by jefa - 02 December 2015 at 14:05 |
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Armin Geisler
Sales Director Jefa Rudder & Steering |
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Sea-U
Commadore
Joined: 14 September 2012 Location: Norway Status: Offline Points: 476 |
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Posted: 23 October 2015 at 10:42 |
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Thank you Jefa. That makes sence and explains it all.
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Sea-U is a 370e #532 located SW Norway
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alidal
Captain 
Joined: 30 September 2010 Location: Norway Status: Offline Points: 297 |
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Posted: 23 October 2015 at 11:33 |
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Does anybody know if Hanse also recommend to remove the cable from the hull anode?
Is this anode on newer boats? (after 2010) Maybe that`s why my drive was corroded?  Edited by alidal - 23 October 2015 at 11:35 |
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Hanse 400#655
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jefa
Lieutenant
Joined: 01 December 2008 Location: Netherlands Status: Offline Points: 34 |
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Posted: 24 October 2015 at 15:39 |
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I am sorry, but I have been asked to take away my posting. By this.
Edited by jefa - 02 December 2015 at 14:06 |
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Armin Geisler
Sales Director Jefa Rudder & Steering |
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