3572Re: [campernicholson] Re: Seacocks
- Nov 6, 2006Stainless steel seacocks! Is there such a thing? Made in Kazackstan?
Have you ever seen stainless steel keel bolts corroded completely thru?
Cn 31-113 'Blueprint'
On Nov 6, 2006, at 7:08 AM, keith morris wrote:
> It's a moot point about s/s below the waterline, there will always be
> differing views on this topic. I don't think there will be any salt
> water on the threads as they will be inside the boat wrapped in PTFE
> and the outside will have several coats of anifouling, plus I always
> inside the skin fitting with an artists paint brush. I think I prefer
> to have two similar metals linked together with salt water than the
> opposite. I am in two minds over this matter.
> On another topic, I recently noticed that my forestay was working
> loose, on further inspection it was noticed that the stem head fitting
> was pulling away from the stem head. On removing the stem head it was
> found that CandN in their infinite wisdom had glassed in a aluminium
> plate to take the stem head bolts, salt water must have down the bolts
> and the inevitable corosion occured. My solution was to make a plaster
> cast of the outside of the hull in line with the bolts and had it
> cast in bronze [Aus. $40] and through-bolted it. It will never move
> again. Has anyone else had this problem? I still have the plaster cast
> if anyone would like to have it you are welcome to it. PS I beleive
> that the staunchons have aluminium plates under them, thank god mine
> look okay. Regards Keith.
> Graham Norbury <gnorbury@...> wrote:Not sure I'd want a
> stainless steel valve body - stainless below the waterline is very
> prone to crevice corrosion in the threads and other areas deprived of
>> Typically modern seacocks have a bronze body, teflon valve seat and a
>> chromed bronze ball, although sometimes the ball may be stainless.
>>> -----Original Message-----
>>> From: email@example.com
>>> [mailto:firstname.lastname@example.org] On Behalf Of keith morris
>>> Sent: Friday, November 03, 2006 12:00 AM
>>> To: email@example.com
>>> Subject: RE: [campernicholson] Re: Seacocks
>>> I too intend replaceing the Blakes seacocks with stainless steel
>>> ones. But one must remember to change the skin fitting to stainless
>>> steel as well. Do not install stainless seacocks on bronze skin
>>> fittings, the results can be increased corrosion between the
>>> different metals. Tenancier is hull No. 106 I think offhand, and is
>>> berth at Southport Yacht Club, Queensland, Australia, so the boat is
>>> always in warm salt water, maybe UK owners do not have the same
>>> corrosion rate/speed as experiecced here. Thankyou all for
>>> expressing your views, a great read. Regards, Keith Morris.
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