TimC
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| posted on 14/3/07 at 12:51 PM |
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Preparing Ali for Powdercoating
I have a number of brackets etc made from anything up to 3mm Ali plate. How well do I need to prepare the cut edges for powdercoating?
I'm unsure whether or not to spend ages making them nice if:
a. The powdercoat will work better with a keyed surface, or
b. If the powdercoat will cover small imperfections anyway.
Cheers
TC
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dan__wright
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| posted on 14/3/07 at 01:03 PM |
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are they not being plasted before they are poweder coated? think thats the norm.
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Moorron
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| posted on 14/3/07 at 01:04 PM |
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Hi boss,
Stuff we have done for work sometimes gets scratched during handling here, so we use a scotch bright pad on an angle grinder to clean it up, this
comes back fine from the powder coaters.
Also we have things punched so it leaved a very small sharp edge (.25mm???) and this also comes back fine.
i wouldnt bother polishing anything up.
Sorry about my spelling, im an engineer and only work in numbers.
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jambojeef
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| posted on 14/3/07 at 01:05 PM |
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Although the powdercoat is quite thick comapred to a spray paint - it still picks up imperfections quite noticeably if the finish I get from my local
powdercaoters is anything to go by.
I would clean it up so you cant see saw marks but dont worry about the sort of scratches you might get from very coarse wet and dry paper / ally oxide
paper or from draw filing - they shouldnt be noticeable
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TimC
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| posted on 14/3/07 at 01:30 PM |
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Thanks all
In particular the CBR Turbo Twins... I want a go when its done!
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Moorron
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| posted on 14/3/07 at 01:34 PM |
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quote:
Originally posted by TimC
Thanks all
In particular the CBR Turbo Twins... I want a go when its done!
NO! 
Sorry about my spelling, im an engineer and only work in numbers.
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JB
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| posted on 17/3/07 at 08:00 AM |
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I would expect a nice radiused edge or corner to be better for adhesion than a sharp edge. Also with a sharp edge there is more risk of the coating
getting chipped off.
When I had my aluminium parts powder coated they went through a chemical wash / etch before hand. I am not sure of the exact process. Peatys at
Bradford did all my stuff.
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