galvanizing costs

dannewhouse

Member
Location
huddersfield
been reading up about guessing the price of galvanising but I think I'm in the wrong ball park figure

they reckon 10% of weight gain ie galv so a gate weighing 100kg (heavy gate) will gain 10% ie 10kg

10kg = 0.010 ton x £221/ton = £2.21 per gate surely I'm far too cheap?
or did they mean you pay £221/ton x (110kg) 0.11 ton = £24.31?
 

MOG

Member
Livestock Farmer
Location
Llanthony
I thought the charge was based on the wieght of the object being dipped. Thus you would get 10 heavy gates dipped for your £221, so £21.10 per gate to have them galved

Usually a minimum charge of 1 tonne so you need to ensure you get enough objectsd to make it worth while
 

Bloders

Member
Location
Ruabon
last lot we had done was about £350 per ton.
on the assumption your galvanising gates, apart from it being (IMO) a better corrrosion protection method, i consider it cheaper than paint.
OK, so (using the numbers above) you can get more than enough paint to do a gate for £20, but then the gate needs prepping, painting, more than one coat -the list goes on.

they charge (where we go anyway) on the weight of the complete item after galvanising, so its the weight of the item plus the galvanise on it.

Just making a load of new sheep pens now, so they will be off soon
 

Mursal

Member
I said this before and still its a mystery ...............
Weight of the item, what has that got to do with covering it in zinc?

But paint is no comparison to hot dipping ......
 

dannewhouse

Member
Location
huddersfield
debating it for my gates which have been fitted for 1 year so are slightly rusty will they be better blasted first??

2 gates were painted red oxide then silver over so they would need blasting 1st?
 

Mur Huwcun

Member
Livestock Farmer
Location
North West Wales
They will acid dip them before galvenising. Get them done, you will not regret it. Had a tour of IAE last year and their galvenising plant was very interesting.

Chatting with a local fabricating company last year, they galvenise everything now. The cost difference over painting on awkward shapes were marginal on labour alone!!!
 

the-mad-welder

Member
Location
Suffolk
If you blast new steel to remove the mill scale before dipping you get a lot better finish than if you send it 'as is'. Any rusty or painted items ideally need blasting first. Ive used my local plant to re-galvanise an already dipped fan housing that needed repair. They acid dip it to remove the old galv first. The extra charge for this was worked out, by them, by assuming it weighed 50% more than it did when dipped.
 
I said this before and still its a mystery ...............
Weight of the item, what has that got to do with covering it in zinc?

But paint is no comparison to hot dipping ......

I wondered this, the only reason I could come up with is that the dipped steel takes heat out of the tank as well as the zinc, so a solid lump of steel will have less surface area and use less zinc than a hollow section, but will take a lot more heat out of the tank. Perhaps the cost of replacing the heat is a major cost to the process?
 

Blackleg

Member
Location
Hereford
They base the cost on the finished white weight - how much the thing weighs when it's been dipped.

There's different rates for different types of work though. Structural stuff might cost £220/tonne, general fabrications might cost £350/tonne, more ornate stuff might cost £450/tonne.

There's a lot less work dipping structural steel than a spiral staircase. There's been zinc surcharges recently, £15/tonne last autumn and another due soon I think.

Still a lot less hassle than painting, money well spent (y)
 

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