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#1
04-11-21, 23:03
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Nice one Ron. Please upload any additional pics that you feel may be of interest. The crankshaft is in the tank today! I'll forward the pictures to you tomorrow. Expecting a good result. By the way, hope your Van is behaving itself?
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#2
05-11-21, 05:51
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Going back a few years now, but this was a previous thread on various chemical and electro means of cleaning parts:
http://www.mapleleafup.net/forums/showthread.php?t=147
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#4
06-11-21, 19:30
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Electrolysis Bath
Just got a small question out there. Trying to read up on this process which looks quite spectacular for these engine cleaning results. Does Hydrogen embrittlement ever needs to be considered using this process? Or is it that the items are never in the "Bath" that long to cause any degree of this micro atom action? Are there Chemical experts still out there?, Cheers Andrew.
__________________
Valentine MkV Covenanter MkIV Lynx MKI and MKII Loyd Carrier / English / Candian / LP. M3 Stuart
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#5
07-11-21, 23:14
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Hi Andrew. To my knowledge I've never previously heard of such problems associated with this type of component cleaning. Hydrogen production does occur as a result of the electrolysis process but on this scale I don't believe it's significant. As you also pointed out, cleaning cycles generally don't exceed 20hrs. Certain materials don't react favourably with electrolysis! Aluminium for example.
Regards the items I've cleaned so far, I'm delighted with the results. However, I must point out I'm not a chemical engineer, so I'd certainly be interested to learn if there's any potential downsides? Every day's a school day! Last edited by Craig W; 07-11-21 at 23:19.
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#6
08-11-21, 09:33
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Hydrogen embrittlement is definitely some thing to be considered, when using electrolysis, as it can cause rapid crack formation and failure of a component.
That being said, it is predominantly the case for high strength steels, low grades are not so susceptible to embrittlement. I would not use electrolysis for something like the U bolts that holds an axel to the springs, leaf springs or tow hook etc. The effects of hydrogen embrittlement can be mitigated by heat treating the steel after the electrolysis to drive the hydrogen out.
__________________
1941 Chevrolet, Cab 12 CGT, 7A2 body 1944 Ariel W/NG 1944 Scammell Pioneer SV/2S x 2 1955 Austin Champ, 04BF45 1946 Chevrolet 5400 COE, Civilian
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#7
08-11-21, 18:41
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Embrittlement ?
So how do you define a crankshaft as being?,( high grade steel? ) and how much time in the bath will cause this? Does this embrittlement process start straight away , or if something like a crank is submerged for a day, it won't effect it at all? Cheers Andrew.
__________________
Valentine MkV Covenanter MkIV Lynx MKI and MKII Loyd Carrier / English / Candian / LP. M3 Stuart
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#8
08-11-21, 22:17
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Sadly I can not give you definite answer to those answers to that, eg. not sure if its cast or forged.
actually this the wiki article not to bad https://en.wikipedia.org/wiki/Hydrogen_embrittlement and its also worth maybe checking out the references.
__________________
1941 Chevrolet, Cab 12 CGT, 7A2 body 1944 Ariel W/NG 1944 Scammell Pioneer SV/2S x 2 1955 Austin Champ, 04BF45 1946 Chevrolet 5400 COE, Civilian
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