It`s 2018 - Whos Steaming

Mobiledynamics ---

""jondon.com - chems are my best friend for carpets/upholstery. And some of this stuff is INSANELY economical. 1:32
dilution""

Yes !!! Got on their website 13 years ago - great information and products..

Once when I had to completely remove a couple years of really bad mold that had been growing in the entire interior of a dang big Ford Explorer, I used their fungus and mold killer and another product that prevented it from coming back,, And a lot Osha grade masks... :)
Dang thing nearly killed me anyway.. :)

I looked very carefully at a full on Demo of your Sapphire tool at steambrite.com; a bunch of really nice Texas boys who sell all the products I use and more..
Looks great ! Thanks again for the reminder !
Dan F
 
mobiledynamics said:
BTW, Dupray want`s tap water in their machines. Not distilled. I suppose their philisophy is that at higher temps it`s corrosive ?
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Distilled water is no more corrosive than tap water. However, it is less conductive due to the lack of impurities, which can mess with water level sensors -- I suspect that is the reason Dupray doesn`t want you using it.

I only use distilled water in my VX5000 and haven`t had any issues with it.
 
Stokdgs said:
Once when I had to completely remove a couple years of really bad mold that had been growing in the entire interior of a dang big Ford Explorer, I used their fungus and mold killer and another product that prevented it from coming back,, And a lot Osha grade masks... :)
Dang thing nearly killed me anyway.. :)
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Crazy story but you know how there is this eco-green movement. After Hurricane Sandy, I had a couple of bidders come out for work. One of the GC`s looked at my setup ( I had already cut lower 4 feet sheetrock everywhere), and started going on this tangent story. You know , in India, etc, there is fungus and mold everywhere. Their bodies get accustomed to me. And then he told me he was recommending to not do a thing for the renov I was proposing. Here I was with greenback in hand, in the literally sense and he did not want to make money !
 
FWIW, my Daimer 1500C is still OK despite, uhm...pretty egregious neglect :o

Tap water, seldom drain it out (and you should see the mineral deposits when I do), bad bad bad Accumulator. Still works fine though.

One of these days I`ll put something in the chemical tank and see how it goes, just never seem to run into anything that the steam alone won`t handle. Eh, light-duty application where that unit is borderline overkill I guess.
 
1) UPW (ultrapure water) is not caustic. Conversely, in it`s purest form it because acidic when exposed to atmosphere because it readily absorbs CO2, which converts to carbonic acid. However, by default, UPW can only have a pH of 7 (again when not exposed to air). So proper pH measurement can only be done inline or with proper buffers. We actually wrote a paper on this topic because researchers were always complaining that their water was acidic.
2) UPW will corrode iron, brass, poor quality steel. However, it will not corrode stainless steel as long as the welds are proper, even then hard to make SS conducive to corrosion by UPW. Example, resistivity meters that we use are made from SS (need to be to conduct electricity across 2 metal probes to get a reading).
3) UPW will not corrode Pyrex . After all, HPLC and LCMS grade water (not going to define so look it up) is placed in glass containers. Distilled water is even made in glass stills for laboratory use. Having said this, it will leach some silica and boron, so they actually should use special glass. But it won`t corrode it. I had a bottle of LCMS grade water sitting in the lab for years. Also, exotic plastics don`t need to be used, such as PFA, PVDF, Halar, etc. The possible exception is in a fab of a semiconductor plant. We use polypropylene, PEX (cross-linked polyethylene), and even PVC (but not ideal because in some cases the glue can leach TOC`s - total organic/oxidizeable carbon that are undesireable, for example in a waste water treatment plant.).
4) the comment that "pure water is less corrosive than water with impurities", is not completely true. Put a brass or iron bolt in distilled water and see what happens compared to tap water. Also, power plants don`t use UPW because tap water is more corrosive. All steam powered plants (coal, gas, nuclear, etc.) use UPW, because residuals will form on the turbine blades and throw them off balance and destroy them. Also, impurities from the water will leave residue on the evaporators in the cooling towers and render them useless. One can`t compare the corrosiveness of tap water and UPW. I`ve seen very corrosive tap water (classic example is the city water issue in Flint, MI. The water is corroding the pipes and leach lead into the water because it contains chlorates). UPW can be corrosive to other metals because it forms carbonic acid when exposed to air. etc......
By definition, ultrapure water is defined as ~17.0-18Meg-ohm or type I water. Meaning does not contain dissolved ions to conduct electricity. In theory, if you throw your TV into a tub full of UPW it won`t short out. If swimming in a lake of UPW and lightening hits the water you won`t be electrocuted, because it contains no ions to conduct electricity. The theoretical limit for UPW is ~18.26 Meg-ohm.
 
Coleroad said:
1) UPW (ultrapure water) is not caustic. Conversely, in it`s purest form it because acidic when exposed to atmosphere because it readily absorbs CO2, which converts to carbonic acid. However, by default, UPW can only have a pH of 7 (again when not exposed to air). So proper pH measurement can only be done inline or with proper buffers. We actually wrote a paper on this topic because researchers were always complaining that their water was acidic.
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I don`t know if that is you speaking or if you cut and pasted that, but I guess it depends on who does the research and what the end use is. There are definitely applications (heated tanks) where higher grades of stainless are specified for DI water vs. tap. Also if your intent is to not contaminate the water, you will need higher grades (more corrosion resistant) because the "pure" water will want to combine with things more readily, so to speak.
 
Setec Astronomy said:
I don`t know if that is you speaking or if you cut and pasted that, but I guess it depends on who does the research and what the end use is. There are definitely applications (heated tanks) where higher grades of stainless are specified for DI water vs. tap. Also if your intent is to not contaminate the water, you will need higher grades (more corrosion resistant) because the "pure" water will want to combine with things more readily, so to speak.
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Yes, because if upw is exposed to air it will readily absorb co2. Then it becomes more acidic. This then is more corrosive to certain materials. Tap water can also be more corrosive than upw. It all depends on what material you are talking about, and the circumstances. Fact is your both right, and both wrong. There`s no absolute answer unless you fill in all the circumstances involved.
 
`PRND[S said:
;2127597`]UPW (Ultra Pure Water) is different from Distilled Water.
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Yes ultra pure water is level one, distilled is level two. Distilled water still has the same behavior of readily absorbing co2, and turning it into carbonic acid. Distilled water can range anywhere in ph from something like 5.4 to 7.

Edit: also keep in mind ph is measurement of strength, but not a measurement of capacity.
 
`PRND[S said:
;2127597`]UPW (Ultra Pure Water) is different from Distilled Water.
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Coleroad said:
Yes ultra pure water is level one, distilled is level two. Distilled water still has the same behavior of readily absorbing co2, and turning it into carbonic acid. Distilled water can range anywhere in ph from something like 5.4 to 7.
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You know, that`s all fine...but my button is bigger.
 
I`m enjoying the schooling by those of you who paid attention in your Chem classes :D

Speaking in the practical sense, any up/down sides to using Deionized water in the steamer? I`ve seldom bothered doing it but am curious. (I`ll probably just keep putting tap water in mine..)
 
Accumulator said:
I`m enjoying the schooling by those of you who paid attention in your Chem classes :D

Speaking in the practical sense, any up/down sides to using Deionized water in the steamer? I`ve seldom bothered doing it but am curious. (I`ll probably just keep putting tap water in mine..)
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My understanding with steamers is you can get more (spitting) with distilled water. How true this is I have no idea. Some irons, steam mops, clothes steamers, etc say only tap water. While some others say only distilled water.
 
Anyone who thinks that using distilled water is analogous to pouring carbonic acid into their steamer is nuts. The pH level of distilled water in normal use is fine and doesn`t present a corrosion hazard.

Distilled water doesn`t become acidic until it has saturated with CO2, which it can`t if you open a container of distilled water, pour it into the steamer, and then pressurize the steamer. Also, the pressure vessels are made from stainless steel, which is corrosion-resistant.
 
Setec Astronomy said:
How many different types of stainless steel are there?
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Lots and beyond that about the only thing I know is the 304 is typically the choice for high end exhaust systems while 409 is often what you find in the market and 440 is commonly found in knife blades. In other words I know nothing. ;)
 
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