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.

[Tony Pratt 1Participant @tonypratt1]

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