Cold Gal trailer question
Submitted by streaker boy on Sat, 2011-08-13 17:13
Im goin to cold gal my trailer after i get the rust from my trailer off with wire wheel oh drill now How many coats should i give it one or two? And after the cold gal is on do i just leave it like that or paint over itwith silver? Any other info will be great 2 cheers
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fishy fingers
Posts: 1719
Date Joined: 28/04/07
Neither
it will still rust in no time as soon as it comes into contact with saltwater, the only way is hot dipped galvanize cost a bit but a new trailer will cost a lot more.
Vinesh87
Posts: 2751
Date Joined: 02/04/11
When i did my trailer i got
When i did my trailer i got everything hot dipped that i could and only put cold gal over the welds as a touch up. Normally cold gal should go onto the bare CLEAN Metal, won't work over paint or other stuff. 2 coats with good drying time in between and after is enough i feel. The only reason to paint over it would be for the look as cold gal is pretty rough.
How bad is the rust? Hot dipping is the best idea! If all the rust is not cleaned and taken off it will probably show through the cold gal in not very long at all?
BTW i am not a metal worker so correct me if i am wrong !
thesupervisor
Posts: 1136
Date Joined: 10/06/09
im a site welder and i just
im a site welder and i just use cold gal but eventually it will rust
i go back to repair damaged gates over and over so i get to see it
i did a experiment on my new solid axel
i cleaned it up with a wire wheel then a flap disc
2 coats cold gal,2 coats red oxide,2 coats kill rust in aliminumn colour
that was 2 years ago and its still like it was the day i painted it
getting the bottom line final answer from a bunch of blokes that use false names and put smiley faces at the end of paragraphs is not the best place in the world to get the information you seek.
streaker boy
Posts: 527
Date Joined: 23/05/09
i have now decided to get it
i have now decided to get it hot dipped so over in perth whats an average price single axle for bout around 5.2 mts and for them to pull it apart and put back together
fishy fingers
Posts: 1719
Date Joined: 28/04/07
They wont do that
you will have to strip it and put it back together theyre galvanizers not trailer builders it's done by wheight but mine cost
about 1500 bucks from memory
thesupervisor
Posts: 1136
Date Joined: 10/06/09
some cases its cheaper to
some cases its cheaper to buy a new trailer
ive had a quote from some guys in henderson for a ali i beam trailer to suit 5mtr ali boat $1900
a steel gal one was $2100 with a walk way
getting the bottom line final answer from a bunch of blokes that use false names and put smiley faces at the end of paragraphs is not the best place in the world to get the information you seek.
till
Posts: 9358
Date Joined: 21/02/08
Yeah that and galvanising
Yeah that and galvanising doesn't put back steel already gone ;)
smash
Posts: 434
Date Joined: 01/12/10
too true Til
though most steel trailers have plenty of meat. Im always a little wary of older box section trailers though.
thesupervisor-those prices seem incredibly cheap, last year I got quotes from most of the boat trailer builders I could find in Perth for a 5.5 plate boat trailer.
And the cheapest was Trailit at $5.5K. Cheapest local ally equivalent was about $8K!
snappermiles
Posts: 2100
Date Joined: 05/11/10
ali trailers
smash try ace trailers! he is north of the river in wangara does a great job and is very cheap!!
http://www.acetrailers.com.au/home/
ALL FISHERMEN ARE LIARS EXCEPT YOU AND ME! AND IM NOT SO SURE ABOUT YOU!
smash
Posts: 434
Date Joined: 01/12/10
thanks snap
ive since bought a 6m trailcraft (2003) with a trailcraft Ibeam trailer. Every one knows what the boats are like (not perfect at all but definitely functional) but the trailer is the ducks nuts. There is a bit of rust but of course you can see exactly where and what it is, unlike any box section one. Easier to drive it on alone with a catcher than winching with someone else.
Thinking about getting it hot dipped again though.
iana
Posts: 652
Date Joined: 21/09/09
My Trailer
I recently did up my boat trailer.
First the only way I could dissmantle it was with an angle grinder.
So all was replaced, including springs wheel rims, 2x hubs, brakes etc etc, it was a tandom.
All up it cost me $1800, and all labour was my own.
Parts came from trailer parts.
Paint, I used a brew supplied by "Phoenix Paints" , they make it and its a water based paint used for protecting steel surfaces for industry, including marine.
They give instructions on how to apply it, and also supply according to your needs.
The company is at unit 1, 79 Forsyth street, O'Conner.
web site WWW.phoenixpaints.com.au
Now I cant say how my trailer will look in 5 years time, but so far its holding out OK.
I have more info if required.
PS they are next door to trailer parts O'Conner just for convienience.
smash
Posts: 434
Date Joined: 01/12/10
galvanising
some tips,
if you are building a new trailer and want it hot-dipped DONT used gal steel, use black. Anything to be galvanised that is already gal needs to be acid bathed first and will cost EXTRA, not less.
You also need to take great care regarding drain holes and pressure relief, as (say) a box section with the ends sealed is no good, needs a hole each end to allow gal in, and drain out without exploding. Also holes need to be drilled oversize for bolts, as if you need to redrill after, well there goes your coating!
One of the local galvanising mobs has all the tables on their website for oversize holes, drainage etc. Cant remember which, maybe Western Gal or similar.
If you are redoing your own trailer, grind all rust off yourself, otherwise they will sandblast as well, before acid bath then galvanising.
Cost to galvanise is around $2.20 a kilo of steel weight from memory, so a trailer of 250kg might cost about $500. If you hang the winch post, shackles brackets rims etc to the chassis with steel wire then they will get done also.
There really isnt a viable comparible low maintenance alternative to galvanising except ally. Painting if done correctly certainly works but even paint chips easily from stones, and you cant do inside a box section.
An Ibeam steel trailer is the only way to be sure that the trailers actual condition is visible.
sea-kem
Posts: 14983
Date Joined: 30/11/09
I Use Ferogalv in Welshpool
I Use Ferogalv in Welshpool to get all my jobs done. $2.20 a kilo is quite pricy. I usually get around $1.50 kg. Shop around.
Love the West!
aaasnapper
Posts: 218
Date Joined: 15/01/10
Galvinisning is only about
Galvinisning is only about $1/kg. The price will go up it you require the trailer double dipped. e. if it does not fit in bath.
If it needs to be double dip probably $1.2 kg.
The equivalent to galvinising in paint is a Rich Zinc Two Pack Expoxy, applied to a 2.5 class sandblasted surface (expensive)
null
sea-kem
Posts: 14983
Date Joined: 30/11/09
Tell me where you're getting
Tell me where you're getting it for a $1 a kilo cause that's an absolute bargain, even $1.20 a kilo is bloody cheap. As I said I'm in the trade and get good rates but not that good.
Love the West!
smash
Posts: 434
Date Joined: 01/12/10
yeah I didnt shop around much
yeah I didnt shop around much but retail was around that at a couple of places. My mate has a large fabrication shop and offered to get it done thru him but definitely wasnt near $1.20 a kilo.
So maybe you better check its not just a coat of silver paint :-)
sarcasm0
Posts: 1396
Date Joined: 25/06/09
Hartway Galvanisers in Canningvale
Maybe? My dad made the trailer for their 7.5mt yacht and had it hot dipped, I think it was there. Prices all sound fairly expensive, I remember him saying it was 50-100$ Because we are about to rebuild the dinghy trailer.
Better check up on this beforehand I reckon!
squidder
Posts: 457
Date Joined: 03/09/10
Galvanising
cost $1.80 a kilo picked up in Bunbury and returned.
Any rust or corrosion should be cleaned off or that will incur an extra charge.
A mate of mine, when drilling the drain holes threaded them and bunged em after putting an oil/diesel mix inside the chassis and other RHS's and it has not corroded a bit in 15 yrs.
He keeps it real clean, even gives it a squirt after he puts in.
People that have the attitude, I'll wash it tomrrow will pay in the short run.
till
Posts: 9358
Date Joined: 21/02/08
Bit risky for my liking, I'd
Bit risky for my liking, I'd rather fit a trailer flush than attempt to seal and oil the beams.
sea-kem
Posts: 14983
Date Joined: 30/11/09
They dip in acid baths to get
They dip in acid baths to get rid of the rust and corrosion. They will charge extra for paint removal and some places will charge for box sextions IE if it's in the shap of a chest or a drum.
Love the West!
smash
Posts: 434
Date Joined: 01/12/10
"and other RHS's and it has
"and other RHS's and it has not corroded a bit in 15 yrs."
with all due respect-how would anyone know if there was rust inside?
Personally, even if sealing it and filling worked 100%, Id be very reluctant to buy a secondhand trailer that wasnt Ibeam or Cbeam. While any steel will corrode even if washed down religiously at least the condition is able to be seen and judged.
Also, it must be remembered that galvanising is a sacrificial coating.
sea-kem
Posts: 14983
Date Joined: 30/11/09
Yep better off having all the
Yep better off having all the sections open for an easy flush of fresh water. That's all you really need to do.
Love the West!