How to remove rust without breaking a sweat...

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How to remove rust without breaking a sweat...

Postby Piggy1987 » Wed Apr 01, 2015 9:17 pm

Rusty car bits?

Put down the hammer/wire wheel/sandpaper...

try this instead!

Rust be gone!
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Re: How to remove rust without breaking a sweat...

Postby lozz » Thu Apr 02, 2015 7:43 pm

excellent. 8)
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Re: How to remove rust without breaking a sweat...

Postby steve_earwig » Thu Apr 02, 2015 8:23 pm

I think the process is taking the negatively charged oxygen molecules to the positive wire and the positivity charged iron molecules to the negative rusty car parts. Or some such, who cares, it works :cheesy:

Not sure about painting calipers with Hammerite as they get hot, probably be better off with pwoppa caliper paint. I'm thoroughly disillusioned with Hammerite these days anyway.
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Re: How to remove rust without breaking a sweat...

Postby dirtydirtydiesel » Thu Apr 02, 2015 9:31 pm

Hamerite or more importantly smoothrite paint works great on brake calipers, they don't get that hot !
I did mine on my Citroen zx 2.0 16v over fifteen years ago in gold smoothrite :oops: (I know, I know, I was younger & dafter)
Anyhow it still looked great when I sold it ten years later 8) .
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Re: How to remove rust without breaking a sweat...

Postby MixMan » Thu Apr 02, 2015 11:53 pm

That just looks like me cooking dinner...... :supafrisk:
Currently frustrated by: 2002 2.2HDi Executive Saloon
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Re: How to remove rust without breaking a sweat...

Postby steve_earwig » Fri Apr 03, 2015 7:58 am

Your cooking involves wires? :shock:

Smoothrite's ok, I'm just not keen on Hammerite. BX 16Valve - blub :cry:

Piggy - I meant to say that battery charger might be no good for actually batteries but it still has a purpose :cheesy:
Talking bollocks sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - now slod :( :( :(
1991 Yamaha TDM850
2008 Toyota Recall4 2.0 VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - Seriously!
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Re: How to remove rust without breaking a sweat...

Postby PeterN » Fri Apr 03, 2015 12:41 pm

Looks good - how about a tank big enough to put the whole car in? 8)
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Re: How to remove rust without breaking a sweat...

Postby runner1 » Sat Apr 11, 2015 3:37 pm

Steve_earwig Nice to see another member with interest in Citroen BX's, had a an old BX GT myself and dreamed of a phase 2 16valve! Never happened though :-(

Anyway, reverse electrolysis is great for removing rust but there are a few things the you tuber has not stated! For starters the bit to be de-rusted needs to be in generally good condition, i.e. only surface rusting, although it can often look far worse than it is! Also, the sacrificial anode MUST be mild steel and not an alloy, otherwise the remaining electrolyte could become quite poisonous!
Also, current should be limited. If the power supply is fixed this can be achieved by putting a car lightbulb in series with either negative or positive sides. If too much current is allowed to flow some parts could be damaged through the aggressive agitation of hydrogen release. Variable power supply is best and current limited to about 50mA per cm2 or similar.

Another thing, a huge amount of care must be exercised with this method. The electrolyte is really quite conductive, over 2A would flow at a voltage of 2V!! when the plates were clean. Seems harmless right? Well dip your hand in the water while it is running and you will realise it is not lol!
Also only ever do this outside, the resulting hydrogen and oxygen are highly explosive!

I saved a lovely old magneto phone from an abandoned mine before it was sealed a while ago and the results of this method were very good. However I still had to send the parts off to be sand blasted to remove the paint, I think using electrolysis was probably a more gentle way to remove the rust!

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