Hot Dip Galvanizing a Frame
Thread Starter
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Tuned
Joined: Mar 2017
Posts: 417
Likes: 37
Hot Dip Galvanizing a Frame
I'm looking at getting my 1996 F250 frame hot-dip galvanized. The process is done at about 850 F. Is there any issue heating the frame up to 850 for a little bit that I should be aware of? As I understand it, these frames are low carbon and not heat treated, but I wanted to be sure before getting it done. For comparison, powder-coating is done at about 425-450F.
Laughing Gas
Joined: Oct 2014
Posts: 946
Likes: 186
From: Carnation, Wah
1340f is the lowest critical temperature I can remember for steel... and a quick webbysearch agreed.
I remembered it in C(725) which made me go look to make sure.
I do know that normalization occurs at lower temperatures than that,
but normalizing shouldn't do anything
bad for a truck frame, that I can think of.
I would expect that your plater would know better than most...
t
I remembered it in C(725) which made me go look to make sure.
I do know that normalization occurs at lower temperatures than that,
but normalizing shouldn't do anything
bad for a truck frame, that I can think of.
I would expect that your plater would know better than most...
t
Thread Starter
|
Tuned
Joined: Mar 2017
Posts: 417
Likes: 37
1340f is the lowest critical temperature I can remember for steel... and a quick webbysearch agreed.
I remembered it in C(725) which made me go look to make sure.
I do know that normalization occurs at lower temperatures than that,
but normalizing shouldn't do anything
bad for a truck frame, that I can think of.
I would expect that your plater would know better than most...
t
I remembered it in C(725) which made me go look to make sure.
I do know that normalization occurs at lower temperatures than that,
but normalizing shouldn't do anything
bad for a truck frame, that I can think of.
I would expect that your plater would know better than most...
t
Trailering
Joined: Apr 2017
Posts: 22
Likes: 8
If you intend to paint over the galvanized frame there is a process that you have to adhere to. One is there is a window of time after it is galvanized that there is a minimum of prep work, but that window is small. If that way won't work then the next, what I did, is to sandblast the frame. It's called sweep blasting. You're not removing anything in doing this and the angle of the blasting is on a 45 degree rather than straight on. You still need to prime it before paint. The the last is a 2 year wait and all you do is clean the surface as normal. All of this is online if you want to look it up. I used Bill Hirsh frame paint on mine from TP Tools. Amy good paint will work and you can also powder coat it too. My paint has been on several years and it holding fine.
Thread Starter
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Tuned
Joined: Mar 2017
Posts: 417
Likes: 37
I'm trying to pick between galvanized or painted. I've powder coated a couple of motorcycle frames, but I'm looking for a tougher coating for the truck chassis.
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Trailering
Joined: Apr 2017
Posts: 22
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As you know the galvanizing will even be inside the frame where it's boxed. If you do galvanize it you should sandblast if first. I deal with a galvanizer and they hate people bringing them things that still have paint and crud on them. It contaminates the stripping tank needlessly.
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Hotshot
Joined: Jun 2015
Posts: 12,879
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It is galvanized and powder coated.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
What are you paying for hot dip? I did a 8x20 trailer frame I built. It was 3500.00 for the service but it has lasted 15 years. U haul is really big on using HDG on trailers and truck parts which is what gave me the idea years ago.
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Tuned
Joined: Mar 2017
Posts: 417
Likes: 37
there’s a place a few hours away that quoted 0.37/lb of steel. Minimum charge of $250.00. That’s for acid dip and hot galv dip. 3 mil thick.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
That's a excellent price!!
Hotshot
Joined: Nov 2017
Posts: 17,500
Likes: 2,777
From: Northern Ontario
If you get it done, post up a pic will you, I’d like to see that.