Does brasso leave a film/redisudual layer?

[MikalCarbine257]

I know many brass/copper polishing compounds leave a layer on the copper to protect it from oxidation, but does brasso?

If so, are there any ways of removing this?

Edit: I found this product which claims to leave no residue behind:
http://www.wired-2-shop.com/joneakes/Pr...il.asp?ProdID=59&nPrdImageID=&CatID=15

 

[silverpig]

I can't say for sure, but I can tell you how to clean it simply. I use brasso to polish phosphor-bronze for use in low temperature physics experiments. After polishing I require the surface to be extremely clean as I do all the thin-film processing on top of it in a clean room. I use an ultrasonic wash in acetone followed by methanol and I'm good to go.

The ultrasonic wash is probably not easy to do for you, but I'm sure using a soft cloth or cotton swab with acetone will remove the brasso residue (if there is any), and then methanol or isopropyl alcohol will remove the acetone residue. And just in case you didn't know, acetone is nail polish remover, and you can get 99% pure isopropyl (rubbing) alcohol at the drugstore.

 

[MikalCarbine257]

The reason I ask is because of my CPU/GPU waterblocks, right now I am soaking them in ketchup overnight, if that doesn't help I'll try your suggestion after

I'll post results too

 

[CycloWizard]

Originally posted by: MikalCarbine257
The reason I ask is because of my CPU/GPU waterblocks, right now I am soaking them in ketchup overnight, if that doesn't help I'll try your suggestion after

I'll post results too

Ketchup? That's... one approach.

I'm not familiar with Brasso, but I am with the general chemistry behind its implementation. Generally, metal needs cleaning because it oxidizes. Thus, whatever agent you would use to clean said metal should be a suitable reducing agent (i.e. Brasso). If Brasso claims to prevent oxidation (instead of only removing it), then it must leave some residue to prevent the oxidation reaction from occurring in the future. In absence of such a film, oxidation will occur again and you'll have to buy more Brasso. Just based on marketing, I'd assume that, unless specifically mentioned, it does not prevent oxidation and will not leave much of a residue behind. That said, there will be reaction products from the reduction behind regardless of what cleaner you use (probably mostly water). Like Silverpig said, a little acetone and IPA will likely take care of it regardless of what it is.

 

[silverpig]

Brasso actually has abrasives in it too.

 

[dkozloski]

Brasso=petroleum vehicle+abrasives. Residue depends on purity of vehicle.

 

[Howard]

Originally posted by: CycloWizard

Originally posted by: MikalCarbine257
The reason I ask is because of my CPU/GPU waterblocks, right now I am soaking them in ketchup overnight, if that doesn't help I'll try your suggestion after

I'll post results too

Ketchup? That's... one approach.
Like Silverpig said, a little acetone and IPA will likely take care of it regardless of what it is.

You can never go wrong with India Pale Ale.

 

[CycloWizard]

Originally posted by: Howard
You can never go wrong with India Pale Ale.

You can, but only if you drink it. :beer::disgust: