Best paint for protection against rust

[aspenarb]

I have had lots of stuff galvanized over the years and it works out a fraction of the cost of paint. Take the prep and painting time into consideration over and above the cost of the paint and galv look s very cheap. They dunk stuff into a hot vat of acid that kills rust and makes paint just fall off then straight into the vat. The only thing you have to watch out for is distortion, if the guys that string the bits up prior to dunking them dont take a little care the job can distort.

 

Bob

 

These frames cost me about £80 each to galv, no prep needed they deal with the whole job. Can you imagine trying to rub down into all those nooks and crannies with sand paper, then trying to get paint to stick

 

Edited August 13, 2015 by aspenarb

[Woodworks]

Don't know about galvanising being a fraction of the cost but definitely cheaper.

 

Just had a quote for painting the whole thing and that was £600-£800

 

Galvanising comes in at 85p per KG. The whole processor ways around 750kg

 

Both said they needed it shot blasting first.

[GardenKit]

I used to get a lot of stuff galvanised in a previous job Beau.

 

They would never accept painted items, as all paint has to be removed prior to galvanising and the acid baths just wont do it. So sand blasting is essential.

Also the item being galvanised has to be designed, or modified, for galvanising. All sealed cavities (such as when a box section brace is welded between two other surfaces) have to be drilled and vented to let the zinc flow in, and out. The holes have to be in the right place so that no air pockets are formed and to ensure a complete drain. If the item is not correctly drilled they will not dip it as there is a danger of explosion and a hot zinc shower. They will charge heavily to drill the holes for you.

 

Its nice when its finished, but a lot of time and cost to get it prepared, plus be prepared for distortion.

[aspenarb]

I sent in a painted landrover chassis and the just dipped it, galv and sent it back. £135. That was wessex galvanizing. As for cost they weigh the job before it goes in and weigh it again when complete and you pay for whats used, if you look at those frames there are drain holes in them to drain out excess. You pay for the weight of material used not the weight of the job.

 

Bob

[scraggs]

Don't know about galvanising being a fraction of the cost but definitely cheaper.

 

Just had a quote for painting the whole thing and that was £600-£800

 

Galvanising comes in at 85p per KG. The whole processor ways around 750kg

 

Both said they needed it shot blasting first.

 

but surely you only want to galv the main bits, so weight is going to be way under 750kg once you strip it down.

Galv is definately a better option than paint imo, prep time is far less and once it's done you won't be touching it again.

Failing that Zinga is good but very pricey and it must go on a sand blasted surface for good adhesion, rustoleum is another.

I used some of that rust bullet paint on the landy steel bits, and didn't think much of it.

[scraggs]

plus be prepared for distortion.

 

That is for sure.

I think some places are worse than others, our local one is notorious for distorting even hard to distort stuff, a lot of local firms sent to medway now.

[mendiplogs]

Need to do some work on our processor as it's got a fair bit of rust developing. It was fine until last winter when I had a lot of jobs in the cold weather and towing it around on freshly gritted roads did it power of no good. Only metal paint I have used in the past is Hammerite but really not sure this is the best option plus it will look shabby unless I can get a colour match which seems unlikely.

 

Would love to get it galvanised but imagine that would cost a bomb so what do you recommend

 

HI MATE MOLEVALLEY do some good paint mate thanks jon

[Woodworks]

This distortion issue could be deal breaker for the whole machine

 

Could get the chassis done and paint the rest.

[Macpherson]

Think it would have to be blasted as everything gets covered in hydraulic oil from the chain.

 

Yep, there`s no way round it if you go for paint it`ll need degreased, blasting obviously gives the best keyed finish for any paintwork and once the surface is prepped Galvafroid is top spec.for paint.

Real galvanising is without doubt the best long term rust solution if you go to the bother of stripping the whole thing down but with the drawbacks that others have mentioned.

Good luck.

[Haironyourchest]

The joys of being a heavy machinery owner.....

 

My powder coated concrete mixer rusted badly, I painted the rust with boiled linseed oil. Looks horrible bunt hasn't rusted no more. Not gonna impress anyone with a mixer though, but a chipper needs to look good....

 

I feel your pain.