VinceGledhill
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| posted on 17/8/16 at 07:23 PM |
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Electrolysis problems
Some years ago I read the Electrolysis see the light thread, and filed it, deep in my brain for later retrieval.
Well now's the time and I have stripped my MGF ready for the Ariel atom style build, but I've failed.
I put about half a bag of soda crystals into water and gave it a stir. I then got out my trusty battery charger, connected the negative to the
"part" and the positive to one of the old bolts from the donor.
This picture was after a week, still rusty. Where did I go wrong?
Regards
Vince Gledhill
Time Served Auto Electrician
Lucas Leeds 1979-1983
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britishtrident
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| posted on 17/8/16 at 07:29 PM |
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Add some salt to the solution and start with nice clean mild-steel anode.
Sheet steel works best as anode Surface area facing the cathode should be as large as possible.
[Edited on 17/8/16 by britishtrident]
[Edited on 17/8/16 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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theconrodkid
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| posted on 17/8/16 at 07:31 PM |
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afaik rust will only be removed from the part of the part being de-rusted that can "see" the other anode ?.
you need a much bigger item connected to the +....i hope that makes sense 
who cares who wins
pass the pork pies
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Bigheppy
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| posted on 17/8/16 at 07:46 PM |
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Make sure the croc clip has clean metal to connect to
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r1_pete
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| posted on 17/8/16 at 07:52 PM |
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As Conrod & BT say it works very close to line of sight, if you line the container with a sheet steel anode you'll get results.
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joneh
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| posted on 17/8/16 at 07:54 PM |
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Make sure the Croc clips bite into clean metal. I bashed some old box section flat and wired them together to form a circle to surround my parts.
Make sure they're as close to your part as possible without touching.
Try using a smaller container, like a bucket. You should see bubbles within a couple of minutes.
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gremlin1234
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| posted on 17/8/16 at 08:20 PM |
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are you using the right soda crystals?
there are three types with very similar names, would have to check which is which though.
baking soda
washing soda
or
caustic soda
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britishtrident
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| posted on 18/8/16 at 08:15 AM |
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Actually thinking about it for that syle of part I would probably just pickle it in vinegar for a couple of weeks. Then immediately wash off in
baking soda buffer solution.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Irony
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| posted on 18/8/16 at 08:27 AM |
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I used a bit of old metal bar from concrete reinforcing. I bent it in a spring shape and placed the part inside the coil. Making sure they
don't touch of course. You should see bubbles with a couple of minutes.
My charger has a 'normal' charge setting and a 'charge/start'. You can definitely see a huge difference between the settings.
Many more bubbles on the higher setting.
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MikeRJ
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| posted on 18/8/16 at 08:30 AM |
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A single bolt simply isn't big enough for the anode, you need something with far more surface area e.g. a sheet of steel or multiple steel rods.
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Irony
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| posted on 18/8/16 at 09:57 AM |
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Oh and don't use a played or stainless anode. It releases significantly nasty chemicals.
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coozer
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| posted on 18/8/16 at 02:20 PM |
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So, a big piece of steel down one side of the box. drill a hole in it and BOLT the cable on...
Grip with the part with a pair of mole grips again drill a hole in the handle and BOLT the wire on.
What sort of ampage is your battery charger? Is it one of them 'smart' jobbies?
Ideally you need a power supply with a good 5~6 amps out.
I use a laptop charger, gives out 17v and 6amps. Does the job...
Before..
24 hours later...
1972 V8 Jago
1980 Z750
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loggyboy
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| posted on 18/8/16 at 02:34 PM |
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An old brake disc is a great anode - cheap (ie free), easy to get, nice large surface area & flat ish.
[Edited on 18-8-16 by loggyboy]
Mistral Motorsport
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coozer
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| posted on 18/8/16 at 03:13 PM |
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Yep, last time I used two brake disc, one each side of the tank and it worked a treat, if a bit messy! They dont half degrade quick!!
1972 V8 Jago
1980 Z750
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loggyboy
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| posted on 18/8/16 at 03:35 PM |
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quote:
Originally posted by coozer
Yep, last time I used two brake disc, one each side of the tank and it worked a treat, if a bit messy! They dont half degrade quick!!
Thats the best sign its working well !
Mistral Motorsport
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Mark100
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| posted on 23/8/16 at 07:50 PM |
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im in leeds two I have spare grahite anoids (much cleaner ) you can have if you like I put one on each side of tank. I have a thread on here somewere
for details
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