Technical & Reference Section > Tech and Restoration

anyone used 'Oxalic Acid' bath?

(1/2) > >>

20to26:
...for removing rust from chromey bits?
The results over on bmxmuseum look impressive. Can we get this stuff here in the UK?
I've done the coke(zero)/foil thing which is great but sometimes doesn't get all the rust or black stain off.

stidds:
Used it loads of times, it really is as good as they say.

On ebay type....... Oxalic Acid

Disolve said OA in water, immerse rusted part for 24 hours and they wash off.  All the rust has gone.

20to26:
Thanks Sean, does OA effect aluminium or anodizing at all?

Juju:
Oxalic acid works by attracting the positively charged ions in the iron oxide (rust).

I dont think its going to harm aluminium, as aliminium oxide is a different chemical compound.

Its safe, but apparently its not great for the environment to pour your bath straight down the plug hole when finished - I've seen suggestions that you should at least neutralise the acid by adding an alkali to make the bath at least ph neutral.

A small qualtity of caustic soda might do it.
 

stidds:

--- Quote from: 20to26 on May 01, 2009, 09:07 AM ---Thanks Sean, does OA effect aluminium or anodizing at all?

--- End quote ---

Doesn't harm aluminium or decals at all, only the rust is affected.

Navigation

[0] Message Index

[#] Next page