Hello Mendy, Mike, Ed, and All, I've been told that "chloramine" doesn't out-gas like chlorine does. We in California have to cognizant of this additive to our drinking water.
http://www.purewaterproducts.com/articles/removing-chloramines http://www.chloramine.org/chloraminefacts.htm This Subject comes up every so often on this List, and the oft-repeated disclaimer is "that readers new to the List should run a search in the List-Archives" on this subject for a review of past comments and observations. Bob V. --- On Tue, 11/20/12, Mendy Ouzillou <ouzil...@yahoo.com> wrote: > From: Mendy Ouzillou <ouzil...@yahoo.com> > Subject: Re: [meteorite-list] Water cutting question > To: "Michael Mulgrew" <mikest...@gmail.com>, "Ed Deckert" > <edeck...@triad.rr.com> > Cc: "meteoritelist meteoritelist" <meteorite-list@meteoritecentral.com> > Date: Tuesday, November 20, 2012, 3:58 PM > Seems to me that if you recirculate > the water, all that out-gassing is for naught as the blade > will re-aerate the water. > > > > >Mendy > > > > > > > > > > > > > >>________________________________ > >> From: Michael Mulgrew <mikest...@gmail.com> > >>To: Ed Deckert <edeck...@triad.rr.com> > > >>Cc: meteoritelist meteoritelist <meteorite-list@meteoritecentral.com> > > >>Sent: Tuesday, November 20, 2012 3:23 PM > >>Subject: Re: [meteorite-list] Water cutting > question > >> > >>Ed and list, > >> > >>I do not know of an exact way to calculate, but a > few minutes at > >>around 29 inches Hg of vacuum (sea level), > especially on a hot plate > >>and with a little aggitation, will remove about all > of the dissolved > >>gasses. > >> > >>Michael in so. Cal. > >> > >>On Tue, Nov 20, 2012 at 2:45 PM, Ed Deckert <edeck...@triad.rr.com> > wrote: > >>> > >>> Hi Michael, > >>> > >>> Is there a method to calculate how long to > leave a specific volume of water > >>> at a specific vacuum (inches Hg) to ensure that > it is degassed? > >>> > >>> Thanks, > >>> Ed > >>> > >>> ----- Original Message ----- From: "Michael > Mulgrew" <mikest...@gmail.com> > >>> To: "Pete Pete" <rsvp...@hotmail.com> > >>> Cc: "meteoritelist meteoritelist" <meteorite-list@meteoritecentral.com> > >>> Sent: Tuesday, November 20, 2012 5:08 PM > >>> Subject: Re: [meteorite-list] Water cutting > question > >>> > >>> > >>>> Pete and list, > >>>> > >>>> Unfortunately the method you use does not > effectively de-gas water, as > >>>> exposure to the atmosphere will allow > atmospheric gasses to continue > >>>> to dissolve into solution; it is the > atmospheric gasses that cause > >>>> water to be corrosive. To de-gas water > you can: > >>>> > >>>> - Boil it > >>>> - Sonicate under vacuum > >>>> - Use a vacuum degasser > >>>> - Bubble He through it > >>>> - Etc. > >>>> > >>>> But unless you store your degassed water in > an > air-tight container > >>>> gasses will begin to dissolve back into > solution almost immediately. > >>>> > >>>> Michael in so. Cal. > >>>> > >>>> On Tue, Nov 20, 2012 at 1:47 PM, Pete Pete > <rsvp...@hotmail.com> > wrote: > >>>>> > >>>>> > >>>>> I do! > >>>>> > >>>>> I fill all my old distilled four litre > jugs with tap water and let them > >>>>> sit with the caps off for about seven > days. > >>>>> A chemist buddy of mine said it takes > about 24 hours for any chlorine and > >>>>> other gasses to dissipate, but with the > narrow neck and relatively small cap > >>>>> opening, to be prudent, after a couple > of days I give it each jug a shake > >>>>> and leave it again for a few more. > >>>>> > >>>>> Cheers, > >>>>> Pete > >>>>> > >>>>>> > From: mikest...@gmail.com > >>>>>> Date: Tue, 20 Nov 2012 11:17:37 > -0800 > >>>>>> To: raremeteori...@yahoo.com > >>>>>> CC: meteorite-list@meteoritecentral.com > >>>>>> Subject: Re: [meteorite-list] Water > cutting question > >>>>>> > >>>>>> Adam, Mike, Carl, and list: > >>>>>> > >>>>>> > >>>>>> The main constituents in "pure" > water that cause corrosion are > >>>>>> dissolved gasses. Does anyone > de-gas their cutting water? > >>>>>> > >>>>>> Michael in so. Cal. > >>>>>> > >>>>>> On Tue, Nov 20, 2012 at 10:43 AM, > Adam Hupe <raremeteori...@yahoo.com> > >>>>>> wrote: > >>>>>> > > >>>>>> > > >>>>>> > Who knows what chemicals lurk > in tap water? By purifying it, you are > > >>>>>> > removing the unknowns. I have > >>>>>> > seen, for lack of a better > term, Lawrencite disease creep up, > > >>>>>> > especially with tap water that > contains chlorine which seems to > accelerate > >>>>>> > the > >>>>>> > problem. I have had no issues > cutting with purified water as long as > >>>>>> > the contact time has been > minimized. I guess purifying it could make > >>>>>> > the water more acidic but I > also monitor the PH level and have not > > >>>>>> > seen > >>>>>> > much of a difference. > >>>>>> > > > >>>>>> > Other alternative coolants > such as mineral oil, pure ethyl alcohol or > >>>>>> > kerosine do not appeal to me > anymore, mainly due to fumes, ignition or > >>>>>> > the smell left in the > specimens. > >>>>>> > > >>>>>> > > >>>>>> > Adam > >>>>>> > > >>>>>> > > >>>>>> > > >>>>>> > > >>>>>> > > ________________________________ > >>>>>> > From: Carl Agee <a...@unm.edu> > >>>>>> > To: meteoritelist > meteoritelist <meteorite-list@meteoritecentral.com> > >>>>>> > Sent: Tuesday, November 20, > 2012 9:35 AM > >>>>>> > Subject: [meteorite-list] > Water cutting > question > >>>>>> > > >>>>>> > I have been following the > thread on cutting irons in water. My > >>>>>> > question is, why distilled or > purified water rather than tap water? I > >>>>>> > was under the impression that > purified water, i.e. ultrapure water, is > >>>>>> > much more corrosive than > mineralized water like spring water or tap > >>>>>> > water. In fact, ultrapure > water is so corrosive it is often used in > >>>>>> > clean labs as a cleaning > medium for surfaces. Also, the pharmaceutical > >>>>>> > industry no longer uses > stainless steel tubing for ultrapure water > >>>>>> > because of corrosion -- they > use Teflon or polyethylene instead I > >>>>>> > believe. Wouldn't pure water > be worse on iron oxidation than > >>>>>> > "mineral" water? I can > understand using pure water to cut down > on > >>>>>> > trace element contamination > for geochemical srtudies, especially on > >>>>>> > stones, but I don't see how > this helps for keeping irons from rusting. > >>>>>> > Also, while we are at it, what > is the best blade for cutting irons? > >>>>>> > > >>>>>> > Thanks, > >>>>>> > > >>>>>> > Carl Agee > >>>>>> > -- > >>>>>> > Carl B. Agee > >>>>>> > Director and Curator, > Institute of Meteoritics > >>>>>> > Professor, Earth and Planetary > Sciences > >>>>>> > MSC03 2050 > >>>>>> > University of New Mexico > >>>>>> > Albuquerque NM 87131-1126 > >>>>>> > > >>>>>> > Tel: (505) 750-7172 > >>>>>> > Fax: (505) 277-3577 > >>>>>> > Email: a...@unm.edu > >>>>>> > http://meteorite.unm.edu/people/carl_agee/ > >>>>>> > > ______________________________________________ > >>>>>> > > >>>>>> > Visit the Archives at http://www.meteorite-list-archives.com > >>>>>> > Meteorite-list mailing list > >>>>>> > Meteorite-list@meteoritecentral.com > >>>>>> > http://six.pairlist.net/mailman/listinfo/meteorite-list > >>>>>> > > ______________________________________________ > >>>>>> > > >>>>>> > Visit the > Archives at http://www.meteorite-list-archives.com > >>>>>> > Meteorite-list mailing list > >>>>>> > Meteorite-list@meteoritecentral.com > >>>>>> > http://six.pairlist.net/mailman/listinfo/meteorite-list > >>>>>> > ______________________________________________ > >>>>>> > >>>>>> Visit the Archives at http://www.meteorite-list-archives.com > >>>>>> Meteorite-list mailing list > >>>>>> Meteorite-list@meteoritecentral.com > >>>>>> http://six.pairlist.net/mailman/listinfo/meteorite-list > >>>> > >>>> > ______________________________________________ > >>>> > >>>> Visit the Archives at http://www.meteorite-list-archives.com > >>>> Meteorite-list mailing list > >>>> Meteorite-list@meteoritecentral.com > >>>> http://six.pairlist.net/mailman/listinfo/meteorite-list > >>>> > >>> > >>______________________________________________ > >> > >>Visit the Archives at http://www.meteorite-list-archives.com > >>Meteorite-list mailing list > >>Meteorite-list@meteoritecentral.com > >>http://six.pairlist.net/mailman/listinfo/meteorite-list > >> > >> > >> > > > > > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
