Re: [meteorite-list] Etching Compounds
Hey All, You can also try going to your local hardware/pool supply store and pick up some pool-cleaning acid. It's used to raise the ph of swimming pools. It usually runs for under $10 a gallon. I recently used some on a small nantan (bought for the experiment) and it ate all of the shale off in less than a day. If you try this, make sure to put the acid in a well ventilated place, as it tends to make a strong sulfur-like smell as it works. It should etch slices fairly well. Anyone else try this stuff? Jason __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Etching Compounds
Dear Stan; My former experience isgo to the local water lab that samples wells/tests ground water. If you ask politely, one can get a 1/4 liter of Nitric if you tip the lowly lab tech with a specimen of meteorite and spend a few moments explaining what an interesting thing it is to be a meteorite collector...and an etching person! They get nitric many times in 5 gallon containers so a cup or so isn't a big thing. Sometimes a 12 pack is the route to go but a REAL meteorite specimen will usually work. Best, Dave the acidman thread killer stan . wrote: Okay, now I know that I can't procure concentrated nitric acid without being employed by an institution of higher learning---unless I want to lie to the suppliers and tell them I'm a Professor of Inorganic Chemistry at Anthrax University or something. I'm no good at lying. says who? just open your phone book to chemical supliers and call one up - there are plenty of places that have retasil sales for lab chemcials - you might not find one locally if you are in the sticks, but it's far from difficult to get. _ FREE pop-up blocking with the new MSN Toolbar - get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Etching Compounds
Okay, now I know that I can't procure concentrated nitric acid without being employed by an institution of higher learning---unless I want to lie to the suppliers and tell them I'm a Professor of Inorganic Chemistry at Anthrax University or something. I'm no good at lying. says who? just open your phone book to chemical supliers and call one up - there are plenty of places that have retasil sales for lab chemcials - you might not find one locally if you are in the sticks, but it's far from difficult to get. _ FREE pop-up blocking with the new MSN Toolbar get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Etching Compounds
Okay, now I know that I can't procure concentrated nitric acid without being employed by an institution of higher learning---unless I want to lie to the suppliers and tell them I'm a Professor of Inorganic Chemistry at Anthrax University or something. I'm no good at lying. So, following somebody's sage advice, I just bopped down to Radio Shack and picked up a pint of etching solution for about five bucks. Ferric Chloride, but I'm not sure what concentration. I assume that, even at full strength, FeCl3 requires more reaction time than does Nitrol. Anybody have experience with FeCl3, or give me an idea of how long I should allow it to react? BTW, I'm plan to use it on Campo and Canyon Diablo. VeIocity __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Etching Compounds
Of course, the down side of using fluoridated compounds is that they can MAKE YOU DIE! ...or just get burned very badly and end up in the hospital. not to belittle the hazards of flourine, but let's keep things in perspective - just because something can kill you doesnt mean it cant be used when handled with due caution - after all drinking too much water can kill you, yet there is no reason to fear water. I'd say it's a pretty safe bet that the acid solution Adam talked about contained nitric acid. IF thats the case then the brownish gas that was evolved was nitrogen dioxide - a VERY toxic gas with a lethal concentration ten times LOWER than that of hydrogen cyanide - the stuff that was used in gas chambers to execute condemned prisoner. (LC50 of 200 ppm for 1 minute vs 2000 ppm for 1 minute for HCN). When viewed in that perspective a little bit of flourine here and there doesnt seem so bad. in short - so long as you take proper safety precuations when using such materials you can use the stuff without worry - but sloppy chemical hygene can cause serious injury or, aqs you pointed out - death. _ Express yourself instantly with MSN Messenger! Download today - it's FREE! hthttp://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Etching Compounds
Of course, the down side of using fluoridated compounds is that they can MAKE YOU DIE! ...or just get burned very badly and end up in the hospital. For those of y'all who subscribe to Discover magazine, they had one of their "Vital Signs" articles about a hydrofluoric acid burn a few years ago. It's enough to turn you away from using fluorinated compounds ever again: http://www.discover.com/issues/apr-96/departments/aninvisiblefire739/ Be careful with that stuff - fluorine is a small enough atom that it soaks right through your skin and attacks your arteries and heart instead of "just" burning your skin. Cheers, MDF > in my very Very VERY limited experience a solution of ammonium biflouride > in > phosphoric acid makes an excellet 'cleaning potion' for iron meteroties. I > was quite skeptical of it's usefullness due to the flourine content, but > the > small sikhote i cleaned over a year ago is in perfect shape today - and > it's > a 'shower' - gets passed around to friends and sits around unprotected in > the wet florida weather. a nice added bonus is that if left on a metal to > be > cleaned it leaves a layer of black iron oxide, somewhat hiding the cleaned > areas in fusion crusted irons. > > > --- Marc D. Fries, Ph.D. Postdoctoral Research Associate Carnegie Institution of Washington Geophysical Laboratory 5251 Broad Branch Rd. NW Washington, DC 20015 PH: 202 478 7970 FAX: 202 478 8901 __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Etching Compounds
in my very Very VERY limited experience a solution of ammonium biflouride in phosphoric acid makes an excellet 'cleaning potion' for iron meteroties. I was quite skeptical of it's usefullness due to the flourine content, but the small sikhote i cleaned over a year ago is in perfect shape today - and it's a 'shower' - gets passed around to friends and sits around unprotected in the wet florida weather. a nice added bonus is that if left on a metal to be cleaned it leaves a layer of black iron oxide, somewhat hiding the cleaned areas in fusion crusted irons. From: "Adam Hupe" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Subject: Re: [meteorite-list] Etching Compounds Date: Fri, 10 Sep 2004 12:45:53 -0700 Hello List, This topic reminds me of the "Magic Cleaning Potion" we purchased from a hippie at the Denver show last year. We figured it was a combination of acids after accidentally reverse etching some Tazas with it. He was right this potion was capable of cleaning things. Not only did it etch our Tazas from the outside-in giving them a 3D appearance, it disintegrated a 2' square hole in our driveway after eating through a seam in a tin bucket. We can hardly wait to give this dude a piece of our mind this year as this potion gassed us out of our shop with a noxious brown cloud and damaged a bucket, ~ 400 grams of Tazas and our driveway. Be careful when using any type of acids to etch or clean with. All the best, Adam Hupe The Hupe Collection Team LunarRock IMCA 2185 [EMAIL PROTECTED] - Original Message - From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Friday, September 10, 2004 11:49 AM Subject: Re: [meteorite-list] Etching Compounds > Hola, > Concentrated nitric acid is about 16 molar (70%). > > You don't want any water you can avoid. It is then diluted (by pouring acid into alcohol) down to "1 molar" (16:1 vol/vol), but in quotes because that should be with anhydrous, or 95% minimum ethyl alcoholI usually consider "molar" as in water, hence the important clarification. > Doug > > careful and have fun drawing figures:) > __ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list _ On the road to retirement? Check out MSN Life Events for advice on how to get there! http://lifeevents.msn.com/category.aspx?cid=Retirement __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Etching Compounds
Hello List, This topic reminds me of the "Magic Cleaning Potion" we purchased from a hippie at the Denver show last year. We figured it was a combination of acids after accidentally reverse etching some Tazas with it. He was right this potion was capable of cleaning things. Not only did it etch our Tazas from the outside-in giving them a 3D appearance, it disintegrated a 2' square hole in our driveway after eating through a seam in a tin bucket. We can hardly wait to give this dude a piece of our mind this year as this potion gassed us out of our shop with a noxious brown cloud and damaged a bucket, ~ 400 grams of Tazas and our driveway. Be careful when using any type of acids to etch or clean with. All the best, Adam Hupe The Hupe Collection Team LunarRock IMCA 2185 [EMAIL PROTECTED] - Original Message - From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Friday, September 10, 2004 11:49 AM Subject: Re: [meteorite-list] Etching Compounds > Hola, > Concentrated nitric acid is about 16 molar (70%). > > You don't want any water you can avoid. It is then diluted (by pouring acid into alcohol) down to "1 molar" (16:1 vol/vol), but in quotes because that should be with anhydrous, or 95% minimum ethyl alcoholI usually consider "molar" as in water, hence the important clarification. > Doug > > careful and have fun drawing figures:) > __ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Etching Compounds
Hola, Concentrated nitric acid is about 16 molar (70%). You don't want any water you can avoid. It is then diluted (by pouring acid into alcohol) down to "1 molar" (16:1 vol/vol), but in quotes because that should be with anhydrous, or 95% minimum ethyl alcoholI usually consider "molar" as in water, hence the important clarification. Doug careful and have fun drawing figures:) __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Etching Compounds
What's a good source for etching compounds, such as concentrated nitric acid? Is a 6m nitric too heavy for etching? Something lighter, maybe 1m nitric? Thanks for your replies and suggestions! VeIocity __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
