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Mysterious patch on rudder

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Ida View Drop Down
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Joined: 18 October 2015
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    Posted: 02 May 2017 at 15:59
After 8 months and 611nm in the water, I wonder about this misterious patch at the rudder. Does anyone know what happened ?




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alidal View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote alidal Quote  Post ReplyReply Direct Link To This Post Posted: 02 May 2017 at 16:30
Is there used another antifouling around the rudderstock?  
Hanse 400#655
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Peter-Blake View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter-Blake Quote  Post ReplyReply Direct Link To This Post Posted: 02 May 2017 at 16:44
I am also sure, there ist diffrent antifouling used in the area of the alumnium ruddershaft.
Same on my boat. I did this  myself! So i know where it is from ;-)
I use copperfree antifouling around the ruddershaft


Edited by Peter-Blake - 02 May 2017 at 16:45
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Rubato View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rubato Quote  Post ReplyReply Direct Link To This Post Posted: 02 May 2017 at 16:49
Exactly what Peter said - the normal antifouling is not aluminum friendly. Since the rudder shaft is aluminum the anti-foul near the shaft (the different colour in your picture) is different. Same thing with the aluminum sail drive.
Steve

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