Oh dear, my tools have suffered - rust!

**BobL** · 26th July 2020, 05:15 PM

Originally Posted by Durham Lad

Hi all, went the vinegar route with a couple of forstner bits the had firly heavy surface rust left them in overnight. Next morning the rust was all gone but left me with two jet black forstner bits. Anyone know why that would happen. Brian.

Iron(II) acetate is normally White, Iron(III) acetate is dark brown BUT I'd say the most likely thing that happened is that the Vinegar acted as a Chelating agent and reduced the Ferric oxide (red brown) to Ferrous oxide (back). If teh rust was significant it had probably eaten away the cutting edge.

**Durham Lad** · 27th July 2020, 04:56 PM

Thanks for the info Bob the rust was mainly on the shaft and the outer circumference surface of the head and the cutting edge is still looks ok will try it out on some scrap. Cheers Brian.

**wood spirit** · 27th July 2020, 07:05 PM

Where do you find oxalic acid. Presune not bunnings.

**BobL** · 27th July 2020, 07:19 PM

Originally Posted by wood spirit

Where do you find oxalic acid. Presune not bunnings.

Yes Bunnings
they sell it as Diggers Rust and stain remover.
I bought mine on ebay

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