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datahawk

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#240627 17-Sep-2018 18:45
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I am looking for recommendations for rust removers or neutralisers mainly to use on small things such as tool bits and other workshop items that develop light surface rust mostly during damp winter months.

 

One of the best products that I used to have in my workshop for this job was named 'Jenolite' and it was excellent for removing surface rust just by soaking items for a few minutes.

 

However, I believe that it contained some toxic chemicals that are no longer approved in NZ and it has since disappeared. I think it is still sold in the UK.

 

Can anyone recommend a similar product available locally?


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Fred99
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  #2092195 17-Sep-2018 21:08
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Phosphoric acid (orthophosphoric acid) works well to dissolve surface rust - and it's relatively non-toxic, not too corrosive, and the main or sole ingredient of most proprietary "rust converters".  Problem is that it'll dissolve bright zinc coatings etc.  They use it (food grade) in coca cola etc - so it can't be that bad for you.

 

There are people selling it on trademoi etc in 1 litre bottles.  I'd wager that "Jenolite" is just that with some dye added so that the stuff feels special.

 

Oxalic acid (you can buy crystals at hardware shops) is good for removing rust stains, but is a bit toxic. 

 

3M make a good rust converter / primer, which I assume uses some tannic acid, but is a polymeric emulsion.  Good to paint on after you've removed loose rust, you wait for it to react/neutralise - the surface turns blue/black, then paint over.  You can get that at Supercheap auto etc.

 

 


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