Powder Coating Kit?

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Powder Coating Kit?

Postby DanBrooks83 » Mon Mar 09, 2009 4:28 am

Hi All

Just been looking into ways of coating my piranha frame.

Powder Coating has to be the way!

Just found this site (www.electrostaticmagic.co.uk), they supply a kit for applying Powder Coat at home.

Does anybody have any experience with kits like this?

Is it possible to get a good finish using a heat gun?

Or do i leave it to the professionals?

My main concern is if i damage the powder coat, is it easy to apply more poder coat to fix the damaged area?

Sry so many questions.

Have fun building.
So many ideas, never enough money!
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Home Powder Coating

Postby Andrew-NZ » Mon Mar 09, 2009 4:45 pm

I have a similar set-up for home powder coating it.. mine is an Eastwoods USA one. I use an old domestic wall oven to cure. It does a good job. Your problem will be the same as me, getting access to small quantities of powder, apart from having to import it. Commercial / trade supplier are looking at 50Kg lots to supply.
Never tried the heat gun method.. if it does not fit in the domestic oven I have not tried to coat it. In the US many people build their own walk in size ovens, based on several oven elements wired up to controllers, temp sensor etc. If you are serious then got to EASTWOODS web site and join there powder coating forum.. untold threads on all sorts of stuff. The "in thing" at the moment is powder coating / ceramic coating of exhaut pipes etc.
The only snag I had with my USA powder coating gun was it was 110 volts AC.. your standard off the shelf 240v to 110v step down transformers are also an isolating transformer, have to modify to defeat the isolating function to ensure correct operation..
If you wanted to PC a whole buggy frame and cure with a heat gun would be a big ask... you would have to coat the whole thing and then heat / cure it section by section without stopping, otherwise you would see the join... all very carefully to make sure none of the uncured powder falls off.... the blast of hot air from the gun could just blow it away... the powder is very very fine, even finer than talcum powder !!!
ANDREW

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Postby westymx » Mon Mar 09, 2009 7:37 pm

i have done a bit of powder coating when i was a young kid to earn a wage. you need to degrease and acid etch etch the metal then rinse and wash with a phosphate/chromate solution, and rinse again. for steel that was going to be exposed to constant weather or salt spray we would zinc coat first. this is a pretty specialised process. not something that i would assume you could do in your back yard, unless you have a pool.

also with the ovens, we would bake at about 180 degrees for about 15-18 mins. this is so you can get the metal the same temperature as the powder, thats how it gets its tough bond. i would not be confident that using a heat gun could achieve this result.

we used to do a fair few roll cages for speedway and drag cars, we would wash them, bake them, coat them and then bake them again. purely because some of the welds would not heat up sufficiently during a single bake, and the coat would flake off prematurely.

for small parts your process would work well, but powder coat is a pretty cheap process. i would leave it to the pros. and as andrew said, the smallest qty I have seen is 15kg, you could do about 20 roll cages with that amount.
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Postby Kane » Mon Mar 09, 2009 9:35 pm

i was under the impression that the average buggy takes 4-5kg of powder
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Postby westymx » Tue Mar 10, 2009 9:42 am

it depends on what colour it is. its like paint. lighter colours will require more powder than darker colours.
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Postby DanBrooks83 » Wed Mar 11, 2009 5:15 am

Thanks for the great feedback guys.

I was sure it was too good to be true, using a heat gun.
Still keen to give it a try for smaller oven sized parts, does anyone know if the powder for p.c can be used for dip coating as well? I imagine it's too fine to bubble air through, but not sure.

Probably get the pro's to do the frame, or possibly automotive paint with loads of lacquer. What have other people used? I would rather Do it myself but only if it will last.
So many ideas, never enough money!
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Re: Powder Coating Kit?

Postby jlf198404 » Fri Mar 26, 2010 7:17 am

i have a friend who uses spray paint on his metal parts, then lights it on fire before it dries, then lets it burn itself out. i thought he was on something cheap, then he showed me a snowmobile frame he painted 3 years ago, and it looked like it was painted within the week, if you try it tho, make sure you are outside, and cant catch anything else on fire. and before anyone asks, it doesn't char the paint, he also showed me things he did in light blue, green, and yellow, and you can't tell they were set on fire.
-josh
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Re: Powder Coating Kit?

Postby itchyback » Mon Jun 28, 2010 1:19 pm

i got quoted ballpark $500 to blast, zinc plate and powder coat my frame and a few other odds and ends. for my time and quality i'll be paying a pro to do it.
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