Thread: gal or paint?

well im guessing to galvanize a chassis is about $200-$300 if it is that much im happy.how much to paint? also do you have to sandblast before if so how much?

Originally Posted by spudboy

Chucaro - Interesting to hear about how good POR15 is. I've read the brochures but never bought any. Not cheap, but would be cheaper than galvanising for sure.

Perhaps if I was in UK where there are few companies which galvanizing LR chassis for many years i would galvanize it but also paint it as well because the exposed galvanized steel deteriorete with impact of water.

Because we are in Oz and hot galvanizing can deform some components and also have to be done very well I take the paint option any time.

Also the chassis can be painted with the vehiclke fully assembled which it is considerable cheaper that pull all apart.

I have mentioned POR 15 because we tested the product but there are other very good products used on the marine industry.

Many test are done with the steel sumerged up to 5000 hour in salty water and do not believe that many LR owners are going to live the LR 5000 hour on the sea so this test are more than adecuate

Here is one test of rust converters for reference for those who like to treat affected areas on the vehicle.

Chucaro, unprotected mild steel will not corrode when submerged over a certain depth of seawater, due to the lack of O2. Moisture, rather than copious amounts of H2O, is far more corrosion inducing.

Originally Posted by schmierer LR at singleton

well im guessing to galvanize a chassis is about $200-$300 if it is that much im happy.how much to paint? also do you have to sandblast before if so how much?

When i was looking into it it was going cost 2-3$ a kg to gal it and thats the weight after dipping, a 110 chassis is probobly 150kg? if not more?? so it was goin to get fairly costly considering transporting it there would require i hired a car float, i would have also had to strip everything out of the chassis wiring wise, every thing that bolts on would have had to be taken off, it would have been very time consuming...

Originally Posted by Chucaro

Well there are a lot of galvanized parts in steel boats that get rusty after some time specially where they recieve impact from water. The rigging screws are one of them that many sailor using them because unlike the SS screws on the gal to replace them when rust is present.

Other examples are the ruddre and rudder post and I can keep going on.

The under coat of POR15 after dry you do not tremove it with a chisel and hammer and no paint bite on it. The second coat have to be apply when the paint is tacky to bite on the under coat

One application more severe than marine and vehicle chassis is the inmersed centrifugal pumps used on the sewerage ponds and on the liquid fertilizer miexers.

The gal pump bodies last about 6 months and then an overhaul have to be done.
The POR 15 painted bodies last over 4 years and when removed for general maintenance the body of the pump was OK.
If the above examples are not good enough for you then..........it is your call

It sounds like the gal examples you have given are due to wear/erosion of the coating rather than corrosion???

This is not an issue on a Land Rover, unless you are dragging the chassis over rocks.

As for warping issues in your next post, I have galvanised every steel part on 1.5 landies with no issues. For those asking about price, the most I have paid is $1.30/kg - any more and you are paying too much.

I don't doubt that POR15 is fantastic stuff. On a well-designed steel boat you have access to coat both sides properly. A box section landie chassis, by comparison, rusts from the inside out 99.9% of the time. Galvanising will coat the inside much better than you can do with POR15 unless you dipped it. With Gal, if you miss a few small areas, no big deal - whereas with POR15, you will still get rust.

As I said, I am sure POR15 is great stuff, but I know that a galvanised landie chassis will outlast the owner in most cases, so that is good enough for me.

Originally Posted by isuzurover

It sounds like the gal examples you have given are due to wear/erosion of the coating rather than corrosion???

This is not an issue on a Land Rover, unless you are dragging the chassis over rocks.

As for warping issues in your next post, I have galvanised every steel part on 1.5 landies with no issues. For those asking about price, the most I have paid is $1.30/kg - any more and you are paying too much.

I don't doubt that POR15 is fantastic stuff. On a well-designed steel boat you have access to coat both sides properly. A box section landie chassis, by comparison, rusts from the inside out 99.9% of the time. Galvanising will coat the inside much better than you can do with POR15 unless you dipped it. With Gal, if you miss a few small areas, no big deal - whereas with POR15, you will still get rust.

As I said, I am sure POR15 is great stuff, but I know that a galvanised landie chassis will outlast the owner in most cases, so that is good enough for me.

Agree 100%

$1.14/kg at the one just down the road.....we may get a slightly beeter price than the general public

Originally Posted by Chucaro

Also the chassis can be painted with the vehiclke fully assembled which it is considerable cheaper that pull all apart.
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I can't believe you are seriously sugsesting painting the chassis on an assembled car, is even 30% as good as hot dip galvanising a bare frame.

No internal coverage, preperation would be awful, adn POR15 is very sensitive to that, there would even be external sections you couldnt paint. It would be an awful job!