3CorsaMeal
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Registered: 11th Apr 02
User status: Offline
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First whether you are spray painting or powder coating, you are simply looking at different *methods* of applying an organic film.
Each has some inherent advantages, but for our purpose powders main advantage is the ability to lay down a thicker coating of the finish. Typical spray paint films run .7-1.2 mils (thousandths in painters terms) and powder films run 1.0-2.5 mils.
Powder is or can be just as flexible as wet paint. I can show you panels that have been powder coated or wet painted that can be bent back and forth until the metal fatigues and breaks, yet the coating will not flake away. This is a property in the coating by the manufacturer.
The most important thing you do is surface preparation. That metal need to be squeaky clean if you want any of those coatings to stick. Any quality shop that does the process will do it for you (let them!) and usually apply an iron or zinc phosphate.
In brief, powder paint is made up of, yes, powder, that is electrostatically applied to the piece to be coated, which is then heated to melt the little plastic pellets. This results in a coating that is relatively thick.
The powder is composed of the same pigments used in wet paint; the difference is only that they are not diluted with solvents that must evaporate after application. An electrostatic charge is used to attract and bond the powdered pigment rather than spraying the pigment in solution.
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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[Edited on 30-03-2005 by corsa808]
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Nismo
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Registered: 12th Sep 02
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PMSL 
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baz2003uk
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Registered: 6th Sep 03
Location: Wiltshire
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you forgot powdercoating dont rust as easy and 90% of the time you get an orange pell effect
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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Can I do powdercoating in my garage?
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Matt H
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Registered: 11th Sep 01
Location: South Yorkshire
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I prefer finger painting 
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John
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Registered: 30th Jun 03
User status: Offline
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quote:
Originally posted by CorsAsh
Can I do powdercoating in my garage?
I powdercoated a hanging basket bracket in techy in 3rd year if that hepls
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Ian
Site Administrator
Registered: 28th Aug 99
Location: Liverpool
User status: Online
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quote:
Originally posted by CorsAsh
Can I do powdercoating in my garage?
I think you need lots of static for large stuff.
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
User status: Offline
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quote:
Originally posted by Ian
quote:
Originally posted by CorsAsh
Can I do powdercoating in my garage?
I think you need lots of static for large stuff.
I could rub a balloon on my head? Or walk round on carpet in socks? 
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1600power
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Registered: 22nd Apr 04
Location: Shropshire Drives: 1.6 16v Sport
User status: Offline
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quote:
Originally posted by CorsAsh
quote:
Originally posted by Ian
quote:
Originally posted by CorsAsh
Can I do powdercoating in my garage?
I think you need lots of static for large stuff.
I could rub a balloon on my head? Or walk round on carpet in socks?
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