Paint For a Water Tank

[Turbo]

At the mens shed we have a large custom made tank for soaking willow prior to weaving it. It is roughly the shape of a large coffin but around 10ft long.

It is made from galvanised sheeting but it has been eaten away, I can only assume by the acid in the willow. It is now quite rusty & I was volunteered to clean it up.

I'll probably use electrolysis to clean the metal but I'm unsure what to use to stop it rusting again. It's not drinking water so my initial thought is epoxy primer but any other suggestions are appreciated. It will need to fairly hard wearing as we wedge lengths of wood across the tank to stop the willow floating on top of the water.

 

[pedrobedro]

I'd line it with something or fibreglass it on top of paint. You could try tanking paint.

 

[WorkshopChris]

I would go with a Resin or Chlorinated Rubber Paint.
https://www.paints4trade.com/chlori...MItZq5oJ2V4AIVS7ftCh2GGQVXEAQYBiABEgLTIPD_BwE

 

[Parm]

Some description of boat building resin, maybe reinforced with fibre glass

 

[bigegg]

wouldn't bitumastic paint work as well as anything?
a lot cheaper than epoxy.

 

[Ton-up]

Use a pond liner inside when painted.

 

[Turbo]

Thanks for the suggestions.

I'm thinking that I might give it 2 coats of zinc primer & 2 coats of bitumen paint as I happen to have 1/2 a tin left from another project.

 

[waldershelf]

Rustolium do a two pack paint designed specifically for paining open water tanks. I'm sure google will help you find some.

 

[knighty]

Use a pond liner inside when painted.

this every time!

clean up the tank and paint it anyway... fit some kind of liner, pond liner, bit of DPM etc.. whatever you have handy

10 years time when you pull the liner out the tank will still be as good as new :-)

 

[bigegg]

this every time!

clean up the tank and paint it anyway... fit some kind of liner, pond liner, bit of DPM etc.. whatever you have handy

10 years time when you pull the liner out the tank will still be as good as new :-)

wouldnt pointy bits of willow puncture a pond liner?

 

[knighty]

put 3 layers in to make sure... as long as the liner is tight against the tank (and the water in the linder should push it against the tank) then it should be ok?

 

[Turbo]

Use a pond liner inside when painted.

Fitting a pond liner would be difficult as the tank has a 1" bsp iron fitting welded at the bottom of one end for draining it. The tank is only used occasionally & is drained after use, otherwise the water gets very smelly! Can't think of an easy way of sealing a liner around the outlet & there's no way we will empty it with a bucket!

I found a litre of zinc 182 primer today & I'll likely use that with the bitumen paint. I also found a 5l of chassis aluminium paint that would look a lot nicer on the tank, I'll have to see what the others think.