[GreenKeys] Oxalic acid for rust removal...

[Jan-Benedict Glaw]

Hi Kenneth,

On Thu, 2018-07-05 08:07:55 -0700, Kenneth Gartland <trnsrme at gmail.com> wrote:
> Was reluctant to use abrasive measures
> to prevent scratching of the surface,
> a little staining or dis-coloration wud be ok...

there are a lot of commercially available rust removers. For small
(and non-deep) rusty spots, you can actually use Coke. It contains
phosphoric acid, which converts iron oxides to iron phosphates, which
are water-solveable. That's what other rust removers do as well.

  However, rust means that iron oxides are built up well below the
metal's surface, so while removing the oxide, it leaves back a rough,
spongy area. There's no way to can convert back iron oxide to a smooth
surface, except polishing it after de-rusting it.

  For larger areas, it seems there are LASER-based systems available,
though I've never used those.

MfG, JBG

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