John Stevenson | 27/05/2013 11:42:17 |
![]() 5068 forum posts 3 photos |
As many may know I make a lot of special dividing plates, these are made from laser cut blanks usually out of a material called A36 which is a hot rolled steel plate that has a thick oxide layer on it.
Also in the picture is a piece of bronze and a piece of copper to see how these perform. I'll say at this point the process didn't do much for them.
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Thor 🇳🇴 | 27/05/2013 11:58:06 |
![]() 1766 forum posts 46 photos | Thanks for a handy tip John, where I live hot rolled steel (similar to your A36?) is readily available and I use it fairly often. I suppose you use rubber gloves and eye protection when handling HCl. Thor |
MadMike | 27/05/2013 12:28:06 |
265 forum posts 4 photos | Remember that simply pouring the diluted acid down the drain, after use, will almost certainly p**s off your local water company. Dispose of the residue carefully. |
John Stevenson | 27/05/2013 12:41:41 |
![]() 5068 forum posts 3 photos |
Posted by MadMike on 27/05/2013 12:28:06:
Remember that simply pouring the diluted acid down the drain, after use, will almost certainly p**s off your local water company. Dispose of the residue carefully. It's sold for brushing on the patio ?? |
Tony Pratt 1 | 27/05/2013 13:19:41 |
2319 forum posts 13 photos |
Posted by MadMike on 27/05/2013 12:28:06:
Remember that simply pouring the diluted acid down the drain, after use, will almost certainly p**s off your local water company. Dispose of the residue carefully. I live in an area with the hardest water going so I would imagine putting 10 litres or so down the drain would not even be noticed by the water company, obviously 1000 litres is a bit different? As an aside how exactly would one 'Dispose of the residue carefully'? Tony
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Thor 🇳🇴 | 27/05/2013 13:32:38 |
![]() 1766 forum posts 46 photos | Tony, if you add sodium carbonate gradually to the residue until it stops fizzing it should be a neutral or slightly alkaline salt solution that you can dispose of in the drain. And as you say, 10L is a small amount and when diluted poses no problem. Thor |
Stub Mandrel | 27/05/2013 17:09:11 |
![]() 4318 forum posts 291 photos 1 articles | They sell even stronger HCl as drain cleaner. It dilutes pretty rapidly, but best to put it down the foul sewer. The things that cause real problems are:
I have seen the effects of an estate with plenty of misconnections - a completely dead stream with nothing but a white layer of sewage fungus all over the streambed. Neil |
John Stevenson | 27/05/2013 17:36:20 |
![]() 5068 forum posts 3 photos | If you use it until it stops working it's no longer acid but dirty water.
Come one guys you are taking H&S too far. |
Chris Heapy | 27/05/2013 22:20:28 |
209 forum posts 144 photos | What you don't wnat is it sitting in your drainage system for while, it will eat the pipes or the cement grouting holding it all together. I dimly recall an electrolytic method of descaling and removing thick corrosion from iron/steel. I'll have to search for it again though. Essentially it was very effective and the article I read described how rusted items (old wagon implements I think it was) dug up from the earth could be completely descaled. |
Ian S C | 28/05/2013 14:21:00 |
![]() 7468 forum posts 230 photos | The electrolitic method works ok. If you don't like strong acids, citric acid will do the job, just takes longer, Most of the scale falls to the bottom of the container, and when you are finished with the acid, you can tip it down the drain, its proberbly less dangerous than Coka- Cola (you could use that too). Ian S C |
Tony Jeffree | 30/05/2013 12:42:07 |
![]() 569 forum posts 20 photos |
Yep, Coke works just fine, and probably Pepsi too - basically dilute phosphoric acid with added flavourings and bubbles. I wonder if this is how they make Irn Bru...? There are other similar (to the patio cleaner) products sold for cleaning grout and cement residue off tiles/slabs - there's one available on Amazon for £14 (£3/litre) that is 36% hydrochloric acid which would need rather more dilution before use than the Cmentone one (which looks to be 5-10% as far as I can tell): Regards, Tony Edited By Tony Jeffree on 30/05/2013 12:43:10 |
oldvelo | 04/06/2013 02:17:54 |
297 forum posts 56 photos | Hi can I point you to this site on setting up to clean with "Electrolosys" http://antique-engines.com/electrol.asp I use this method for ceaning up steel and cast iron parts ready for painting or Blacking.
Eric
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Hopper | 04/06/2013 04:13:53 |
![]() 7881 forum posts 397 photos | Just have the garden hose running down the drain as you tip in the spent acid. Then leave hose running for a while afterwards to make sure acid is not sitting in your drain pipes. |
John Stevenson | 04/06/2013 09:17:37 |
![]() 5068 forum posts 3 photos | Can I try and make a point ?
When the acid has stopped working and won't clean any more plates it's no longer acid but dirty water.
But if I had bought this stuff for the purpose it's made and sold for, I would have sloshed this on the yard and brushed it down the drain.
So it's OK to use it as directed but not OK to clean rusty parts and steel plates with it ???????????
Enquiring minds DON'T want to know.
Actually glad this post has surfaced as it's just remined me. On Sunday clearing a shed out I found a set of dividing head change wheels, probably brand new but stored for years and gone rusty.
So popped then in the solution, just remembered them and fished them out, wrinse under tap and this is what i have now.
No messing with batteries, power supplies etc just bung it into a tank and leave for a day. Edited By John Stevenson on 29/06/2013 13:02:19 |
Cyril Bonnett | 11/10/2013 00:23:51 |
250 forum posts 1 photos | Vinegar works just as well, cheap stuff out of Lidls, remember not to do this in your workshop the fumes will cause other steel objects to rust,
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Jerry Wray | 11/10/2013 08:23:50 |
84 forum posts 4 photos | Cyril provided a link to as site discussing this subject. One of the posters there mentioned muratic acid as if this is some arcane product of the alchemist's art. Muratic acid = hydrochloric acid. It's a synonym. Now hardly used. There's enough attempts to disguise the real properties of chemicals without resorting to ancient history. JerryNotts |
jonathan heppel | 11/10/2013 08:49:41 |
99 forum posts | There is one caveat I can think of. Hydrochloric acid gives off highly corrosive fumes that will rust any ferrous metal they land on- particularly in damp air. General advice is to use it out of doors or at least outside the workshop, A safer alternative is phosphoric acid, either from the net or a farm shop.
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Stub Mandrel | 11/10/2013 17:34:04 |
![]() 4318 forum posts 291 photos 1 articles | I've been regrouting the bathroom. I got some 'acid detergent' that contains phosphoric acid. It states that it 'removes rust stains when concentrated' at about £6 for 2 litres I fancy it could be quite effective (it's ruining my skin...) I'll try it on something. Neil |
John Coates | 12/10/2013 07:39:59 |
![]() 558 forum posts 28 photos | Thanks for this John I'd bought some of this for de-rusting as had read about it before but have not used it yet Your tips are excellent and I'll follow them to tackle some tooling I have made but needs a de-rust before blacking e.g. a locking bar for my motorcycle tyre bead breaker, wheel spacers t'other John |
_Paul_ | 30/05/2014 23:30:05 |
![]() 543 forum posts 31 photos | Apologies for raising one of John's old threads from the dead but Toolstation have Cementone Brick & Patio Cleaner 5L on offer for £6.73 spend over a tenner and the delivery is free. Paul |
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