Rust Stains

[VicParticipant @vic]

I have some cast light alloy plates with rust stains on them. Anyone know of anything to remove them?

[Brian WoodParticipant @brianwood45127]

Oxalic acid

[VicParticipant @vic]

Thank You, I’ll get some.

[noel shelleyParticipant @noelshelley55608]

The product used to clean alli bodies on trucks should do it – find a haulier and you may be able to buy a small quantity. Noel.

[Robert Atkinson 2Participant @robertatkinson2]

EvapoRust is good at removing rust stains from all sorts of surfaces.
If it’s a large piece with small areas of staining you can soak a sponge in it to keep the area wet.

Robert.

[Howard LewisParticipant @howardlewis46836]

Being alloy, (Aluminium rather than steel) the deposit will not be rust (Unless the casting contains ferrous material in some way)

A violent and rather dangerous way would be to paint the item with concentrated Nitric acid. This will remove the corrosion, and being a potent oxidising agent, leave a thin film of oxide on the surface, akin to anodising.

But be VERY careful, (PPE etc) and wash every thing, afterwards.

Howard

[RobinParticipant @robin]

I found rust stains on my alloy wheels, it came from the disc brake behind.

I bought some stuff to remove it and it worked wonderfully.

The next time I tried it, same stain, same stuff, it did nothing.

Be warned, you may only get one shot at this 🙂

Robin

[Bo’sunParticipant @bosun58570]

Another vote for Oxalic Acid.

[Howard Lewis]

On Howard Lewis Said:

Being alloy, (Aluminium rather than steel) the deposit will not be rust (Unless the casting contains ferrous material in some way)

A violent and rather dangerous way would be to paint the item with concentrated Nitric acid. This will remove the corrosion, and being a potent oxidising agent, leave a thin film of oxide on the surface, akin to anodising.

But be VERY careful, (PPE etc) and wash every thing, afterwards.

Howard

I’m not sure concentrated Nitic acid is readily available these days for a non business?

Tony

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