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21st May 2019, 5:40 pm | #41 | |
Dekatron
Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 4,935
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Re: Rust removal from steel component on the cheap.
Quote:
There are some sellers on ebay. You need to add the silica at a concentration of around about 5wt% or a little more, so 50g of silica in 1 litre of water. Anything to do with silica powder sets the Health and Safety bells ringing, so check out the SDS sheets for those materials, use a mask and work in a well-ventillated place if you do use them. They are in widespread use as thickening agents for foods, cosmetics, etc, etc. Regarding electrolysis, a sacrificial iron anode seems like the only way. I tried what I thought was carbon rod but that disintegrated and stainless steel releases harmful chromium compounds. B
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Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch. |
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21st May 2019, 10:24 pm | #42 | |
Hexode
Join Date: Dec 2009
Location: South Manchester, UK.
Posts: 262
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Re: Rust removal from steel component on the cheap.
Quote:
That is all there is to it! Be wary of the conductivity of the solution though. At 2v I got a huge belt across the chest. Very foolish of me to dip my hand in whilst being in contact with the other electrode AND doing so whilst switched on. Probably a good job it was fully loaded and current limited as open voltage was 20V! |
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21st May 2019, 10:38 pm | #43 |
Octode
Join Date: Nov 2010
Location: Ross-on-Wye, Herefordshire, UK.
Posts: 1,654
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Re: Rust removal from steel component on the cheap.
Right - thank you for the recipe. Is the temperature of the solution at all important? I've a vague recollection that heating it above ambient helps things along.
Richard |