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15-12-17, 11:55 PM | #11 |
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Re: anti freeze
I cannot see why the water quality matters at all as long as it does not have anything capable of producing scale. So Softened, RO, DI, Purified or Distilled should not really make any difference. Distilled water should not contain any ions or ionising impurities at all, so should not be any different in this respect to DI water.
Don't forget modern engines do not evaporate water (and hence concentrate the impurities) like they did in the 50s, 60s and 70s.
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15-12-17, 11:57 PM | #12 | ||
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Re: anti freeze
Quote:
Quote:
Basic Chemistry.Way too much preciousness methinks
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16-12-17, 12:17 AM | #13 |
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Re: anti freeze
Just as an aside I use the water from our household dehumidifier which has a "total dissolved solids" of 10 ppb, which is probably within the experimental error of the operator and the cheap tester.
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16-12-17, 11:34 AM | #14 |
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Re: anti freeze
Bibio.....would this be ok?...https://www.eurocarparts.com/ecp/p/c...70511&&cc5_866
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16-12-17, 01:18 PM | #15 | |
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Re: anti freeze
Quote:
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16-12-17, 03:17 PM | #16 |
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Re: anti freeze
Great..thanks
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18-12-17, 09:44 AM | #17 |
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Re: anti freeze
Water: Deionised is the name of the process, it doesn't (read: can't) just remove positive ions, it removes ionic materials which is basically all the things that cause scale, and any salt. The things in water that cause corrosion are, except for a tiny bit of organic acid perhaps, ionic i.e. minerals. Purified is a bit vague but it'll be deionised, distilled or RO (reverse osmosis) water, RO being the "best" but any of these will be good enough. Softened means the "hard" water metals of calcium, magnesium etc. are replaced with sodium, so you don't get any scaling of pipes/kettles but no change in ionic strength and it will corrode things more than one of the purified types of water. Water from a dehumidifier or condensing tumble drier is essentially distilled water, but might have a bit of fluff in it.
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18-12-17, 10:08 AM | #18 | |
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Re: anti freeze
Quote:
Excerpt from an article. Placing the electrodes of a pH meter into a beaker full of deionized water will result in a somewhat meaningless value. This is because deionized water has a very low ionic strength (most if not all of the dissolved ions have been removed) and it is an extremely aggressive solvent when in this state. This company (link below) warns about using deionised water in cooling systems other than ones using special metals which will resist action of the aggressive water. http://www.lytron.com/Tools-and-Tech...eionized-Water
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18-12-17, 10:47 AM | #19 |
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Re: anti freeze
The only reason that distilled or deionised are usually started is so that it's clear not to use tap water. In my neck of the woods tap water would kill the cooling system in weeks as all the timescale falls out.
Water is somewhat corrosive but doesn't need to be distilled etc to stop the corrosion. You could use tap water if you are willing to check pH balance, total dissolved solids and a couple of other things. But that's a faff unless you're running a water treatment plant. Distilled and DI water will corrode your cooling system, but firstly you are not running pure water, you are adding coolant, and secondly the corrosion is slow. You'll sell the vehicle usually before corrosion is an issue. The bike will probably fall apart some other way first. |
18-12-17, 12:43 PM | #20 |
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Re: anti freeze
Various things increase the ability of water to corrode things. If it's acidic, of course, and mineral acids tend to be stronger than organic acids. Dissolved materials such as salts or minerals are the main culprit in the modern world. The link talks about water being the universal solvent, it is, but corrosion is not a dissolution process, it's a chemical reaction on the surface of the metal. Removing things from water only makes it less corrosive. Higher ionic strength can make some things dissolve more, some things less, for what it's worth.
To be honest the quote about the pH meter is meaningless and demonstrates someone's misunderstanding of what it all means. Yes ionic strength is low but this does not mean you don't get a meaningful pH reading, you do - odds are it'd be neutral (pH of 7) as it's pretty much pure i.e. no acids or alkalis in there. |
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