DIY Audio Projects Forum
http://diyaudioprojects.com/Forum/

Advice on finishing raw aluminum.. keeping the aluminum look
http://diyaudioprojects.com/Forum/viewtopic.php?f=14&t=5275
Page 2 of 2

Author:  Geek [ 15 Jul 2015, 22:46 ]
Post subject:  Re: Advice on finishing raw aluminum.. keeping the aluminum

laurie54 wrote:
Just to add to the confusion. Did you know that aluminum can be polished until it has a mirror finish?


But if unless treated straight away, it'll look like garbage quickly ;)

Author:  laurie54 [ 22 Jul 2015, 21:09 ]
Post subject:  Re: Advice on finishing raw aluminum.. keeping the aluminum

Yes you are right Gregg, it will and quickly. I,ve known a few who anodize in the bathtub but truly, only if single or needing a divorce. Remember SAE, PhaseLiniar, and more from the 60's 70's.

Author:  thehoj [ 26 Jul 2015, 07:46 ]
Post subject:  Re: Advice on finishing raw aluminum.. keeping the aluminum

laurie54 wrote:
Yes you are right Gregg, it will and quickly. I,ve known a few who anodize in the bathtub but truly, only if single or needing a divorce. Remember SAE, PhaseLiniar, and more from the 60's 70's.


Yea, after further reading, there's no way I'm going to attempt anything like this myself.

Just trying to decide now between a powder coat, and anodizing..

How durable is a powder coating? I'm starting to come around to the idea of a nice cream color powder coat or something like that..

Author:  Geek [ 26 Jul 2015, 13:25 ]
Post subject:  Re: Advice on finishing raw aluminum.. keeping the aluminum

The Jolida amps I've worked on are powder coated. Seems they can take the temp cycling. Dunno if it was special stuff.

Author:  thehoj [ 06 Aug 2015, 22:18 ]
Post subject:  Re: Advice on finishing raw aluminum.. keeping the aluminum

I posted in my build thread, but thought maybe I should post here as well...

I ended up getting the chassis anodized.. And I was thinking I'll need to take additional measures to make sure the chassis is grounded properly.
The chassis itself is made up of 6 panels (front, back, 2 x sides, top and bottom). I was thinking that I'll grind a little bit of coating away around a bolt on each of the panels, and then use ring terminals with inner teeth bolted down at those points, and then link them together and back to the safety ground.. Does that seem like a good way to do that?

There is also a lip that puts each panel in physical contact with eachother, I suppose I could grind some of the anodized surface away on that lip and the adjoining section of panel, but I have a feeling that wouldn't make as good of an electrical contact as the inner-tooth ring terminals linking each panel together with wire.

Has anyone dealt with properly grounding an anodized chassis before? Suggestions?

Author:  lowhifi [ 17 Mar 2019, 17:19 ]
Post subject:  Re: Advice on finishing raw aluminum.. keeping the aluminum

Late reply but why not.

I work at an airplane factory so i have experience working with aluminium.

Yes aluminium can be polish to a mirror finish, mainly aircraft aluminium because there's a fine layer of pure aluminium called clad on both side to prevent corrosion.

The top plate of my tube amps are made of aluminium and i polished them to a mirror finish and use car aluminium polish and protectant with good results if you can tolerate little scuffs because it scratches very easily even with microfibre cloth.

The first time i use aircraft aluminium with good results but the second time i use common aluminium and it was not an easy task to gave it a mirror polish but it can be done with patience using wet sanding paper up to #3000 and with the use of a cotton buffing wheel and polish compound.

But using a buffing wheel on a plate with large holes are frustrating, scratching a polished plate also.

Finally alodine are conductive but not anodized parts, just sand the area you want conductivity and use dielectric grease to ensure a good contact on long term.
Regards.

Page 2 of 2 All times are UTC - 6 hours [ DST ]
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/