keel coatings

[squidge]

Having spent the whole day yesturday, angle grinder in hand cleaning the corrosion from my steel keel and suffering with aces and pains for the privilage today.I have come to the decision that i really don't like getting covered in .... every year, so my question is ,What can i apply to my keel to prevent the corrosion without breaking the bank?
Thanks /forums/images/icons/wink.gif


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[tr7v8]

I have recommended it in the past but a paint made in the US and sold in the UK by Frosts is a sure fire rust cure. It's called POR15 (POR is Paint Over Rust) and once on needs an angle grinder to get off.
http://www.frost.co.uk/acatalog/Index_Special_Offers_5.html

You'll need their primer and bits but nowt will pull that off.



<hr width=100% size=1>Jim

Draco 2500

 

[oldsaltoz]

G'day Squidge,

Not sure what the keels on Moody's are made of but:-

If your keel is cast iron, I'm afraid you may have wasted a day, cast iron will rust in minutes if exposed, so protecting it must be done almost as you go.

And, yes I have heard of rust converters and other treatments being applied later, so don't flame me please, I'm just not convinced these products are stable under paint and under water.

I sand blasted mine and applied protective coating to one side when the other side was still being blasted. filled in the lows with closed cell balloons.

top coated protective zinc coat with epoxy resin then polyurethane and antifoul, no problems since. Used the same paint as that used on steel piles in harbours.

Perhaps you could ask one of the other Moody owners, they have web site I believe.

Andavagoodweekend. Old Salt Oz /forums/images/icons/cool.gif

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[seaesta]

I just do a quick wire brush, touch up with hammerite and anti foul job each spring. You never seem to be able to really totally prevent the rust anyway and it seems to me that exposing more and more new metal each year results in more erosion than simply covering up - and its a lot less work. Chill out and slap on some paint each year without the heavy sweat and big exposure to toxic arisings.

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[squidge]

Thanks, i did put a coat of red oxide on each side as i had finnished in an attempt to delay the rust untill i find a suitable covering, I am hoping that whatever i put on top of it will not cause a reaction. /forums/images/icons/frown.gif

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[quaelgeist2]

According to my own experience (and professional review in some journals ;-) ) you have made a good start.

The next thing you should do is a rust inhibitor (or convertor as they are called occasionally).

Last step(s) several layers of epoxy/eopoxy-tar, ideally the first really worked into metal using a coarse sanding paper. After the first has set, apply wet-in-wet about 5-7 more layers.

The trick is to totally encapsulate the keel and thus preventing new rust as well as feeding new water and air to the existing rust cells. If you rund aground you have to check at the end of the season if tehre is a need to grind/sand an affected area.

On our boat, a Feeling 720 with mild steel stub keel and centerboard, I have used Sigma-Tar on the keel (4 layers) and a year later treated the centerboard with 5 layers of VC Tar. I has been a lasting solution (confirmed by guy who bought it later) Our Moody 31 does not show rust on her keel, but I will certainly treat it accordingly some time in the future.

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