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Rust staining

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Morvoren View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Morvoren Quote  Post ReplyReply Direct Link To This Post Topic: Rust staining
    Posted: 23 March 2024 at 19:40
Hi all , has anyone found a solution to the problem of the rust staining on the hull below the rigging chain plates . Have tried digging all the sealant out and replacing it but after 1 season the rusty marks are back . Thanks 
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Wayne's World View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wayne's World Quote  Post ReplyReply Direct Link To This Post Posted: 23 March 2024 at 21:48
I found if I removed the chin plate covers completely and clear the SS with an acid and then polished the SS and then completely resealed the covers back on the rust stains did not reappear. It seems some in the forum have chosen to leave the cover off.
Wayne W
Cruising, currently in the Caribbean and will head across the Pacific early 2024
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Morvoren View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Morvoren Quote  Post ReplyReply Direct Link To This Post Posted: 23 March 2024 at 21:51
Thanks for your reply but mine hasnít got covers over the chain plates , think they were fitted on the later models . 
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Ratbasher View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ratbasher Quote  Post ReplyReply Direct Link To This Post Posted: 24 March 2024 at 07:47
Paul - I'm far from being a technical expert but I know that stainless steel needs a supply of oxygen if its not to corrode; by attempting to reseal them you might make the problem worse.  As the chainplates are critical to rig integrity (and your safety!) then rather than rely on uncredentialed opinions I'd strongly advise that you consult a surveyor or decent rigger.  It may be nothing much but if it was my boat I wouldn't be comfortable not knowing what was hidden beneath the plates, especially if it had been going on for a few years as you seem to suggest.

The staining itself can easily be removed; plenty of products in the chandlery.

The pleasures of owning a boat.....!

Iain
H400 (2008) 'Wight Leopard', Gosport UK
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Brufan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brufan Quote  Post ReplyReply Direct Link To This Post Posted: 25 March 2024 at 18:36
Esthetical rust on chain plate, srews, stanchions, anchor fitting is very common.  Especially on Hanse or other "lowcost" brands.   
I have a set of 5-6 srews of my rubbing rails that leak rust on hull since new.  Why 5 or 6 srews among 30 same srews or so ?  I don't know.
Clean the hull & fitting (chainplate) with light srub polish, wax them ... and prepare to redo it the following year. 
If the stains are not enough removed then use oxalic acid (or a dedicated "Hull cleaner" containing such oxalic acid), rince (a lot), polish & wax. 

As Iain said : the pleasures of owning a boat.  
Never forget : Yachts are for pleasures, fun & recreation !
Bruno

hanse 355 - 57

S/Y Spicy Ginger

White hull, 2 cabins, Volvo D1-30, Selden rig, removable mainsheet track system, Simrad (now B&G)-Jefa autopilot.
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Morvoren View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Morvoren Quote  Post ReplyReply Direct Link To This Post Posted: 25 March 2024 at 18:42
Thanks for your replies , think the answer is to remove the chain plates then bed them back in with silicon . That way no water can get behind them and leach out at the bottom and trickle down the hull leaving rusty marks . As youíve said the joys of boating 🤣🤣
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