Honda-SOHC
SOHC.co.uk Forums => CB500/550 => Topic started by: Sesman on November 03, 2021, 01:53:48 PM
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I’m just seeking some advice on my tank prep please.
The plan is:
Currently added 5 litres of acetone and two handfuls of 10mm pea gravel. Soaked for 4 days with regular agitation.
Then drain and add 20 litres of DEOX-C made up with boiled hot TAP WATER to filler neck. Or should this be de-ionised water? The instructions don’t say.
Leave for 48 hours or so with regular agitation then drain
Rinse with 5 litres of deionised water and dry with a heat gun or hair dryer.
Rinse with a few litres of diesel.
Fill to brim with petrol
Install a line filter and go for it?
Thanks in advance.
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I have had these problems in the past, most of the de rust methods work but in my case it was flash rusting afterwards that was the problem. I tried various methods from this forum and other sources but it kept on rusting until i tried nurse Julies tip of rinsing with de ionised water then as you suggest dried it out with a heat gun, which takes ages to get completely dry. Then swill with diesel, and that's how my spare tank is at the moment. So i think your method is sound, go for it!
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I did the gravel agitation then I used Evaporust - not cheap but it works by breaking down the chemical bond between the steel and the iron oxide (rust)- I used a large bottle brush to help it along periodically - a few days later & the innards looked like new steel - flushed out with petrol / oil mix. Fitted a line filter.
I use Evaporust to clean all sorts of nuts, bolts, washers etc it does what it says on the tin. Thick rust deposits need a wire brush or similat to speed up the process. I keep a 5 Litre can in stock - you can keep on using the old Evaporust until it's spent. Bits like long engine mounting bolts I will leave in a used Evaporust bath for a weel or two. Only surface I have found that it has a strange effect on was a slightly rusty gudgeon pin - it turned that particular metal almost black so be carefull with that type of steel.
Not tried DEOX-C as not aware of it but might be just as effective as Evaporust.
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Ted.
I’m using DEOX-C filled to the tank neck. Did you fill to the tank neck with Evaporust?
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I ran 5 litres of hydrochloric acid into it, swish about for 5 mins, washed with deionised water, dried with heat gun, swilled with diesel.
Spotless and clean with no return of flash rust at all.and its been sitting empty for 7 eeks whilst its been painted! Crack on Phil ;)
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Ted.
I’m using DEOX-C filled to the tank neck. Did you fill to the tank neck with Evaporust?
I was too tight at the time to fill to the neck -I put 10 Litres in the tank then lay it on either side eventually putting a plastic bag type seal over the filler cap and leaving it upside down. It weeped into a catch tray a tad but didn't loose the Evaporust.
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I’m a fiscally challenged Yorkshire type so will adopt a similar, value added approach ;D
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I’m a fiscally challenged Yorkshire type so will adopt a similar, value added approach ;D
Give over, yer making me cry ;D
You've just had a stack of Timmy Taylor's vouchers off me, get on ;D ;D ;D
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Already drunk that. 8)
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;D ;D Good boy 8)
;D ;D ;D ;)
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I wonder what deionised water is. Demineralized?
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It’s £2.50, for 5 litres at Asda. ;D
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I wonder what deionised water is. Demineralized?
same stuff
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Thanks, so it is the same water for in a battery when level has dropped.
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That’s right. Good stuff if the quality is good.
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This product. Others are available…..
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Friend of mine did his tank by electrolysis. Worked really well using washing soda and a battery charger
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I would be really careful with acetone if the tank isn't to be repainted.
I have used De-OxC successfully in the past but it really depend on whether there is varnish in the tank from old fuel. I have removed this with hot strong caustic soda solution but of course solvent if you don't care about the paint being damaged.
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Thanks Ash. Care noted. I had no choice as the tank was filthy and much debris had been passed to the carbs :'(
The acetone process is over and I’ve moved on to the DEOX-C stage. What came out during the acetone stage was woeful.
I’m being as careful as I can be. Precautions include a liberal coating of grease, followed by liberal spraying of WD40 before wrapping in several layers of cling film with liberal and regular WD40 overspray. I put some on the tank too :D ;D ;D. I also placed two condoms over the filler neck and bound the neck with string soaked in WD 40 then clipped the ends off to provide a make shift anti spill filler and drain. Seems to have been effective so far.
Like I said,I have no choice.
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I wonder what deionised water is. Demineralized?
Deionised or demineralised water is essentially the same thing. It starts with what is generally tap water that has been filtered through an electrically charged ion exchange resin to remove the bulk of the various soluble impurities. As it sounds the resin exchanges contaminant ions for less harmful ones it's usually pH neutral (pH7). The resin works a bit like a molecular seive blocking the larger molecules from passing through replacing them with smaller like charged ones. Like most things it is graded for pharmacutical use they use high grade stuff to reduce impurities to as close to zero as possible - what you buy for domestic use is still pretty good.
There is also RO (reverse osmosis) water it's essentially a less pure form of demineralised water, lastly there is distilled water - a final condensate when you distill water in a distillation column - this is essentially like steam condensate. Its a complex process as the final product will try to pick up contaminants from the equipment used, the storage vessels and from the atmosphere.
One way of looking at is that deionosed or demineralised water is a highly polished version of RO water to confuse the situation more some commercial grades of demineralised water might actually be less pure than high grade RO water. It mostly depends on the end application as to the right one to use.
When I worked in an analytical laboratory in 2008 we used what was labelled as distilled water - it was in fact high grade demineralised water.
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Ted, you know your H2O :o
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... there is distilled water...
... deionosed or demineralised water ...
What's the (electro)chemical impact of using distilled water for rising/cleanup?
Distilled is avail at every grocery store, demineralised only to be found through laboratory suppliers...
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From what I gathered, and I might have the wrong end of the stick but its used as its completely inert from any other elemental compounds so theres nothing to react to any stage of the process in any way and or to dilute mixes of chemicals that are being applied. The less ingredients in the process, the better the outcome and the easier the process is. In everything really.
Thats my take it but I could be wrong and theres a mammoth chemical based explanation available, but that what twigged with me
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... there is distilled water...
... deionosed or demineralised water ...
What's the (electro)chemical impact of using distilled water for rising/cleanup?
Distilled is avail at every grocery store, demineralised only to be found through laboratory suppliers...
Distilled water is ideal as it leaves no residue when it dries depending on quantity it can be expensive here in the UK.
Are you a Brit living in Austria ST1100 I come from Klagenfurt but live in the UK?
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Thanks Ash. Care noted. I had no choice as the tank was filthy and much debris had been passed to the carbs :'(
far.
Like I said,I have no choice.
That doesn't sound good Phil :-[ :-[... I though he would have cleaned out the tank before sending it to paint or a painter would have advised cleaning or cleaned it himself. That's where Menno Dek is great .. he sent my green CB500K0 tank out to someone he uses for chemical cleaning prior to painting and it looks like a new tank inside.
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Are yo ;Du a Brit living in Austria ST1100 I come from Klagenfurt but live in the UK?
Native AuSTrian... a bit too cosmopolitan though, and there aren't many designated forums locally... ;D
I had experiences of distilled water drawing plasticizers out of materials, making them brittle, hence wasn't sure about any possible "corrosive" abilities towards metal... (I pour it into my ultrasonic cleaner though...)
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Yes, not too impressive. Makes me wonder what else may be lurking >:(
On a more positive note, the cleaning process is nearly complete and the results look very promising indeed.
Just need some replacement coils/leads as the ones installed are like bow strings and are pulling off the plug caps.
Engine strip next year me thinks.
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Are yo ;Du a Brit living in Austria ST1100 I come from Klagenfurt but live in the UK?
Native AuSTrian... a bit too cosmopolitan though, and there aren't many designated forums locally... ;D
I had experiences of distilled water drawing plasticizers out of materials, making them brittle, hence wasn't sure about any possible "corrosive" abilities towards metal... (I pour it into my ultrasonic cleaner though...)
Your English is extremely good no trace of an accent. I have lived in the UK since I was 5 years of age - my German is virtually none existent today - my late mother who came to England when she was 25 lost her vocabulary over the decades - she could understand her sister when they telephoned at Chistmas but lost the ability to reply except in English. I have a cousin Heidi who Ihave visited a couple of times she still lives in Klagenfurt with her husband Gottfried. You live in a beautiful country with some great roads to ride.
Sorry for hijacking the original subject.
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I did mine last week using a mixture of apple cider vinegar and white vinegar I only mixed the two types because I’d run low on one of them ,they both had a acid rating of 5% , I emptied(after 4 days) the tank and swilled it out with broken car glass and distilled water, put the hairdryer in the neck of the tank, when dried coated in a thick 2 stroke oil lightly thinned out with petrol. Great final result.
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Interesting approach. I’ll report on my attempt on Saturday.
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Did mine a couple of weeks ago using a 10:1 ratio of water and oxcalic acid left to soak for 24 hours, then rinsed with water for 10 minutes, dried with hot air gun, followed by swilling with 2 stroke oil and a splash of petrol. The process removed some fairly heavy rust and no problem with flash rusting.
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Your English is extremely good no trace of an accent...
Thanx Ted! 8)
Being present on motorcycle related email-lists and forums since the 90ies...
Deciphering British humor however provides occasional challenges though... ;D
I had to give the heavily corroded CX500E tank out the house, they cleaned the goo out with (industrial grade) hot (120°C) high-pressure wash, then some acids, neutralizers, oven drying (60°C), finally a POR-15 treatment as the surfaces and especially the seams were in really bad shape... fortunately no leaks...
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Ok, it worked. ;D ;D ;D
Absolutely spotless.
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TO DO IS TO KILL THE RUST, LEAVE IT FOR 2 DAYS WITH VINEGAR AND THEN AN OXIDE CONVERTER BASED ON PHOSPHORIC ACID, THEN YOU MUST PAINT IT INSIDE WITH HYDROCARBON RESISTANT RESIN, IF YOU WANT MORE INFORMATION I CAN GIVE YOU LINKS