galvanising spray

[BrokenBiker]

how durable is galv spray?

i only make little bits and pieces and just wondering how well galv spray works to keep rust at bay.

 

[roofman]

how durable is galv spray?

i only make little bits and pieces and just wondering how well galv spray works to keep rust at bay.

ive found it to be a massive con...silver paint with another name

 

[eSCHEn]

In my experience utterly utterly useless. However, what brand? Mine was run-of-the-mill stuff so a better brand may be more durable.

I moved to galv paint (galvafroid) and there is simply no comparison. It is still not as good as "proper" galv dip though.

ive found it to be a massive con...silver paint with another name

Not even good paint at that!

 

[awemawson]

Depends what you mean by 'galv spray'

If you mean rattle cans such as Galvafroid then if the zinc content of the paint is high enough it WILL give sacrificial protection to underlying steel parts, however if it's a cheap version the protection will be limited.

If you mean genuine hot spray zinc such as is applied by a Metco gun, then the protection is excellent but surface preparation is critical - the individual tiny blobs of zinc adhere by physically keying into the surface, so it is best grit blasted first to give a key.

 

[roofman]

I once had a boat trailer and it was galvo steel which was fine...i then welded some additions to it with un-protected mild steel and totally mopped it in household black gloss paint and gave it an extra coat every few weeks. That boat was only used in salt water and the black glossed section including the welded parts never ever showed any signs of rusting at all...ime sure it was rotting inside out but my point is just plenty of thick paint kept it in good fettle

 

[BrokenBiker]

was just thinking of rattle can galve paint such as the parweld stuff on offer on weld equips site http://www.weldequip.com/galvanising-spray.htm

think i will just stick to cheap black paint then if its not that good

 

[Cobbler]

Ive used Bilt Hambers Electrox zinc spray with good results. It isn't cheap though & as far as I know only available direct from Bilt Hamber by mail order. I've also used the cheaper versions & found it no good. When you pick up the cans you can tell the difference by the weight.

 

[balmerchris]

I've found ZG 90 galv spray to be good. But all of those spray tins really only stop flash rusting. Needs a more permanent coating for longevity.

 

[sardine]

Pick up a tin of Galvafroid and feel how heavy it is, compare it to a rattle can .

No comparison.

 

[marlinspike]

Electrox is good, think it's about 90% zinc, but very expensive. I have been using Screwfix zinc galvanising spray at £3.50 a can. It's good for the money, but goes on pretty thin.

 

[BrokenBiker]

Electrox is good, think it's about 90% zinc, but very expensive. I have been using Screwfix zinc galvanising spray at £3.50 a can. It's good for the money, but goes on pretty thin.

ive got to do a timber run tomorrow and its next door to screwfix, will pop in and grab a can

 

[gordon stephenson]

I have brushed and sprayed genuine Galvafroid to excellent results,Got some items in my garage now that were grit blasted then coated with Galvafroid and still not showing a spec of rust anywhere, When it was sprayed i thinned it with Genklene, Zinc in the air made my fillings tingle no end, I'v used the Screwfix galv sprays and they are useless,

 

[Robotstar5]

Pick up a tin of Galvafroid and feel how heavy it is, compare it to a rattle can .

No comparison.

I noticed the weight difference the first time I picked up a can of Galv spray.

 

[Charlie390]

I've found the cheapo spray paint from Lidl is always decent enough for odd bits and bobs of metal. Think it's coming on sale again soon too.

 

[mechman]

Pick up a tin of Galvafroid and feel how heavy it is, compare it to a rattle can .

No comparison.

+1 for tinned Galvafroid I haven't come across anything better yet, though it is dear I think its about £47 for 400 mil unless you can get it elsewhere of course.

 

[sardine]

+1 for tinned Galvafroid I haven't come across anything better yet, though it is dear I think its about £47 for 400 mil unless you can get it elsewhere of course.

Don't post that kind of price without a warning mechman, someone could have a stroke, i felt all feint, and went dizzy for a bit there.

 

[Welderpaul]

Proper Galvafroid paint (Not the spray) is about the best out there. You can tell the metal content when you pick the tin up!
But....it still doesn't last long - properly applied gets about 6 months until rust spots show through. It gets the job handed over and you off site but that's about it

The cheaper galv sprays last about 2-4 weeks until its quite obvious that you've been attacking the original coating. There are other paints out there that will give much better lifespan. Its basically shiny grey paint.

Considering hot dip galvanising lasts around 80 years it shouldn't even be called 'galvanising spray'

 

[awemawson]

Any zinc rich surface will wash off over the years in acid rain irrespective of how it has been applied. Tops of hot dipped farm gates can show bare steel through in 5 year (amhik) however zinc is 'sacrificial' so the rest of the zinc that is exposed acts as a sacrificial anode and protects the rest of the steel from rusting too badly.

I always advocate over painting any form of zinc coating, be it hot dipped, hot sprayed (Metco gun) or rattle can as that will minimise the effect of the zinc dissolving.

 

[James Huddleston]

This picture says it all really

 

[Olderisbetter]

I have used genuine galvafroid on many car parts, After blasting calipers and cast exhaust manifolds I found it was quite heat resistant as well.