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Fuselage corrosion

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Floating around
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Re: Fuselage corrosion

Postby Floating around » Sun Jun 20, 2021 11:54 pm

Just to let those interested know.
After being told that it was my fault for not washing it. I my have lost my cool a bit and sent a rather sharp email to SAB. They then sent me a new fuselage. So it has ended ok but shouldn’t have had to go that way.
I intend to try some of the suggestions in this thread on the old fuselage and keep the new one in reserve for the moment.

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Re: Fuselage corrosion

Postby Tom Tom » Mon Jun 21, 2021 2:14 pm

bigcane wrote:
Tue Jun 01, 2021 9:22 pm
Often this white stuff is the excess grease oozing out of the bolt holes and sticking to the fuse. Soapy sponge is the fix
Although I struggle somewhat with understanding the dymanics of how the grease would attach lilke this, I find it very hard to believe corrosion like that would appear in such a short period of time. I simply cannot believe what is show in the pictures actually is corrosion, especially hearing that it wipes off and others have seen it for a few rides, then nothing. I lean towards the grease-theory.

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Re: Fuselage corrosion

Postby Peter_Frank » Mon Jun 21, 2021 3:58 pm

Agree with Tom Tom.

8) Peter

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jakemoore
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Re: Fuselage corrosion

Postby jakemoore » Mon Jun 21, 2021 4:30 pm

Grease could ball up if there is a change in contact angle if the surface chemistry of the metal changes on exposure to salt water. Precipitation of a deposit is another possibility for example a Calcium Carbonate or another Calcium salt. It may be that there is a salt left over from anodization bath that precipitates the first time it finds sea water. It would be hard to every know without somebody analyzing the specimen.

In any case, many users have reported the phenomenon and have all agreed it disappears promptly.

**********

From the Ketos Foil FAQ discussing depostis on the carbon: https://ketos-foil.com/en/content/11-faq-ketos

My foil whistles or vibrates

A brand new foil may whistle or vibrate if not assembled correctly.

Check that you are using the right screws in the right place. Remember the stabilizer has 2 screw sizes, they are pre-mounted when you receive it but check that the shortest is in the rear, the longer in the front. Verify stabilizer alignment.

What if it still whistles? All of our foils are handcrafted. It may happen that a very slight defect escapes us. We invite you to fully mount your foil and check the leading and trailing edges, that there is no roughness, resin droplet, ect. Please contact us if you detect this

I've been foiling for a while and recently its started to whistle.

Check that there is no impact damage. If so, do not panic, it can be repaired. Close your eyes and run your hand over your mast, is it rough? Limestone and micro algae (if you are sailing in a lake) or salt and micro algae (if you are sailing in the sea) have settled and crystallized, creating micro reliefs. Rinse then with fresh water and if that persists wet sand with 1500g and get in the habit of rinsing and wiping your foil regularly. Check the condition of your front and rear inserts, the surfaces between parts, insure there is no play or impurities possibly causing a poor connection.

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Re: Fuselage corrosion

Postby Floating around » Mon Jun 21, 2021 5:49 pm

well its not grease, I used teffgell on the screw threads. the substance that is on the fuselage dose come of rather easy, but i do have some tiny pinholes oner the area where it was. i assume that it is corrosion coming through an incomplete anodising layer. regardless of what it is, it shouldn't happen.

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Re: Fuselage corrosion

Postby jakemoore » Mon Jun 21, 2021 9:33 pm


Floating around
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Re: Fuselage corrosion

Postby Floating around » Mon Jun 21, 2021 9:45 pm

A new product used in the intended manner should not corrode.if it dose then something is wrong.
As the corrosion occurred in defined patches and not over the whole surface it would seem to be a fault and not a feature! SAB decided it was a fault and replaced it at no cost.

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Re: Fuselage corrosion

Postby jakemoore » Tue Jun 22, 2021 6:54 am

[quote="Floating
Floating around wrote:
A new product used in the intended manner ... replaced it at no cost.
Ever notice a new car has a smell? What do you suppose that is? Is it a defect, a feature, or just a phenomenon? What do you suppose it does for our sperm count?

Anodized aluminum is porous. Whatever they use in the shop is going to fill the pores.

Enjoy your new fuse. Why not wipe the deposit off and report back if it happens again.


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