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Corrosion on rudder stem

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peterr View Drop Down
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    Posted: 01 April 2021 at 18:11

Do i have to be worried? It is corrosion on the stem that goes in the rudder. Best Peter
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peterr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote peterr Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2021 at 18:13
The picture won't load, so

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peterr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote peterr Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2021 at 18:17
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cptgood View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cptgood Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2021 at 19:03
Hi,if you search the forum you'll find plenty of infos. 
Mine was less corroded than yours and I changed it (3k euros) after suggestion from Jefa rudders



Edited by cptgood - 01 April 2021 at 19:05
Hanse320 - Hull#127/08 - Wheel - ST headsail - Yanmar 3YM30 - SD20
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peterr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote peterr Quote  Post ReplyReply Direct Link To This Post Posted: 02 April 2021 at 06:22
Thank you.I will contact Jefa Steering.
I think the aluminium has received som antifoul, not much but it seems to be the explanation.
Best regards Peterr
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Downeaster View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Downeaster Quote  Post ReplyReply Direct Link To This Post Posted: 04 April 2021 at 22:28
As far as I know, Jefa rudders are sold through.  Given that, you would need a lot of corrosion to weaken the rudder to the point of danger.  As suggested, share the pictures with Jefa.  I did, and they said it was ok. 

Just replacing it because it looks bad doesn't consider the actual physics or material science of the situation.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Downeaster Quote  Post ReplyReply Direct Link To This Post Posted: 04 April 2021 at 22:31
Originally posted by Downeaster Downeaster wrote:

As far as I know, Jefa rudders are sold through.  Given that, you would need a lot of corrosion to weaken the rudder to the point of danger.  As suggested, share the pictures with Jefa.  I did, and they said it was ok. 

Just replacing it because it looks bad doesn't consider the actual physics or material science of the situation.

You should use antifoul on your rudder stock - as Jefa instructs (see the instruction sheet on their website).  Just make sure it is a product that is ok for aluminum - and that it is applied correctly.  
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peterr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote peterr Quote  Post ReplyReply Direct Link To This Post Posted: 18 April 2021 at 10:45
Just an update. I have contacted Jefa, and they can provide a sleeve 3mm, to be glued over the rudder post. This will thicken the post and therefor the bearing ends to be bigger. I have ordered both the sleeve and the bearing this will cost 500 euros. The rudder was quite easy to dismantle, so now I only worry about the source of the problem. Might have been the antifouling that came to close over the years . I use International VC Offshore EU.

Best regards peterr


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