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Lamp post close to the sea
2

Lamp post close to the sea

Lamp post close to the sea

(OP)

This may be a very newbie question but I have some lamp posts to install close to the sea.

Do I have to go with hot tipped galvanisd steel or would epoxy coated steel suffice?

Looking for a 2nd opinion, I'm cost driven

Thank You

RE: Lamp post close to the sea

How often do you want to replace it?
Do you get hurricanes? I have seen one storm blast all of the galv off of structures.

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Plymouth Tube

RE: Lamp post close to the sea

(OP)

Well Trinidad has been spared alot of hurricanes.

We wont be responsible for the maintenance just the installation, hence the issue of cost.

RE: Lamp post close to the sea

Ed, Either that was a heck of a storm, or some pretty crappy adhesion of the galvanizing. You should be able to whack hot-dip with a hammer and stay intact.

RE: Lamp post close to the sea

(OP)
Epoxy is the way to go?

RE: Lamp post close to the sea

Epoxy is typically more susceptible to installation damage, and is more likely to rust at those damaged spots (before the install is signed off.)

Depends how much you trust the installers.

RE: Lamp post close to the sea

Tom, a little sand in the blown surf and you wet grind things fast.
Used to go to Wrightsville Beach, nothing facing the ocean has any galv left on it.

Yes, if the install will be done well then epoxy is the way to go.

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Plymouth Tube

RE: Lamp post close to the sea

Ed: Galv does corrode pretty quickly in the seaside environment - but so do a lot of materials. Continuous-wet and salt are particularly bad, thus the ocean-facing side corroding faster due to salt spray (which can be carried for miles.)* Durability is directly related to zinc thickness. Still corrodes much more slowly than exposed steel.

Also - once you get through the pure-zinc "Eta" layer of galvanizing, you will get rust staining/discoloration as the iron alloy layers start to corrode. Iron oxides are a pretty powerful pigment. However, you still have most of the corrosion resistance of galvanizing (slower corrosion rate) until you lose the "Gamma" alloy layer and get down to pure iron/steel.

* Sandy beaches actually have more salt spray carried further, because the average particle size is smaller. Rocky beaches tend to have larger droplets, which fall out of the air faster.

RE: Lamp post close to the sea

(OP)
Thank You Gentlemen

RE: Lamp post close to the sea

The epoxy will flake off, the zinc will not. Both can be attacked by wind driven sand. This coastal resident would chose the galvanized product. You won't be responsible for maintenance, but won't your client be?

RE: Lamp post close to the sea

(OP)
I'm thinking in the long term, the maintenance of the epoxy would be more practical to do in situ.

Received a few quotes and the price for hot tip is 4 times as much as epoxy, meaning after the cost for 4 repairs, the cost of maintenance compared to hot tip would be an issue

RE: Lamp post close to the sea

Field cleaning and painting installed structures/items is noticeably more expensive than an initial shop painting.

RE: Lamp post close to the sea

Neither galvanizing or epoxy will work in isolation. If you want it to last in a severe marine environment then it is essential to do hot dip galvanizing and then prime and apply epoxy paint coatings.

http://nz.linkedin.com/pub/jonathan-smith/39/25/58...

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