Galvanised Steel

[Hunter34]

Just in the process of fitting a 45mm thick plinth in the anchor locker to take a windlass.I was going to price up having stainless brackets made (local stainless place thinks about £40 each and I need 4) to support the plinth until today I came across some brackets that could have been made to measure but they are galvanised steel (made for roofing joists).If I coated these in epoxy are they likely to last.At £2 each I wouldnt even mind buying new ones every year or is it just another silly idea to save myself a few quid.

Andrew

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[Jools_of_Top_Cat]

well your galvi chain lasts in there dunnit?

And it is probably preferable long term to keep SS away from your chain.....



Just my thoughts, not based on fact at all....

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[30boat]

If you're going to paint on zinc you should use an etching primer.There are even water based primers for zinc although I don't know how effective they are.

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[Anchorite]

Re: Galvanised into action

Yes, they will last. No point in epoxying them until they show signs of breaking down (unless it's for aesthetic reasons). Painting a galvanised surface is not a straightforward affair: you must first apply an etching primer (International provide all the necessary info). You should of course treat any holes you drill in the frame (cold galvanisation exists in spray). And if painting, I wouldn't use an epoxy, rather a topnotch one-pot.

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[snowleopard]

galv will last for ages unless it is in contact with stainless when the zinc will dissolve in a few months.

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[Hunter34]

Thanks

Thanks everyone.I guess its 4 x £2 instead of 4 x £40 then.

Andrew

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[Birdseye]

Re: Thanks

These brackets will be made from pre galvanised sheet / strip, cut into bits and press formed. The zinc coating on pre galv is much thinner than it would be on something hot dipped galvanised like most anchor chain - from memory, likely to be as little as 25% of the thickness. Zinc is a sacrificuial coating , and the thickness combined with the effects of uncoated edges mean that it likely will erode fairly quickly. Therefore, coat with a good paint - epoxy say - before installation. In that way, the zinc will give an exytra degree of protection when the paint gets chipped. Like it does on some car bonnets. With paint, they wshould last long enough for what you want.

Are you sure they are strong enough for the job intended?

<hr width=100% size=1>this post is a personal opinion, and you should not base your actions on it.

 

[dickh]

Don't forget these brackets are often made from pre-coated galvanised sheet and the thickness is not as great as traditional hot-dipped galvanising. If the brackets have been punched out from this sheet then the edges will NOT be galvanised and these WILL rust. Hot Dipped Galvanising should last for several years if it is done properly.


<hr width=100% size=1>dickh
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[MIKE_MCKIE]

Get a spray can of Hammerite primer, and another one of Hammerite in the appropriate colour. Done as per the destructions it will last for years.
I have done the outboard bracket on the Avon & it is easy to use, hard wearing & looks pretty good too.
Cheers
Mike

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