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Could you use marble, at a slightly higher voltage? That is what our silver re-claimer used to use as an electrode to collect the silver. Easy to get the silver off of them too. The stainless steel tank is one electrode, the marble is the other. Sincerely, William McCormick
Quote from: William McCormick on 18/08/2012 03:40:25Dielectrics conduct electricity the fastest of all, but at reduced current. Sincerely, William McCormick So you have chosen to carry on talking bollocks then.
Dielectrics conduct electricity the fastest of all, but at reduced current. Sincerely, William McCormick
You clearly have no idea what you are talking about , saying things like "The Green Berets used to use silver wire, the slowest of all conductors on earth"There are two major factors that influence the speed of an electrical signal through a wire. The conductivity of the wire and the nature of the insulator (specifically its dielectric constant).Since silver has the highest conductivity it gives the fastest propagation of the current (all other things being equal, though the effect of the insulator usually dominates the calculation of the speed)"When you see zero ohms on an electrical meter, it does not mean that something out there like silver cannot create even less ohms. It is done that way because most of our stuff is made of copper, the wire, the PC boards you name it. So unity in this case is zero ohms for copper of a short length. Silver would be minus or negative ohms. "More dross.The resistivity of silver is only a little less than that of copper. It certainly isn't zero or (even more stupidly) negative....sorry, you cannot view external links. To see them, please
REGISTER or LOGINPerhaps most importantly, this "Water when you stand in it actually insulates you from ground."Is dangerous nonsense.
Later in the paragraph there is a discussion about waterproof boots which are generally made out of either thick leather, or rubber. In general they may be good insulators, but one should qualify the conditions when they would be insulators... and potential danger points. For example, I met an electrician who likes to use leather gloves when working at 110V or 220V, but would not use them when wet, or at higher voltages. Likewise, a wet leather boot could be dangerous. Water itself is somewhat odd. It is considered to be a relatively poor electrical conductor. However, what it does is provide excellent surface contact, as well as perhaps soaking into the outer layers of skin, and also soaking through other materials that might otherwise have insulating qualities. Water is also a good solvent for ionic compounds which in turn improve its electrical conductive qualities.I've never had my body jump around due to TIG welding. Most TIG welding is done at relatively low voltage (usually 10 to 30 V). It may have a high frequency, high voltage (but low amperage) start current. Sometimes I'll feel a slight tingle, perhaps due to the high frequency start current, and perhaps improperly grounded work. Your skin is actually a relatively good insulator, so one typically isn't shocked by low voltages. The biggest risks with electricity, of course, are getting an internal shock capable of interrupting the heart circuit, or involuntary muscle contractions which can cause a person to grab onto a wire. And, of course, sever burns at high voltages.None of this has anything to do with the hunt for a carbon electrode, although the original poster seems to have some ideas for things that can be tested.
" Carbon brushes take voltage from white sparks, and transmits it through the birth of the carbon. I would not hold a carbon electrode, and connect or disconnect it under a load. I would also not connect or disconnect a rusty iron part while it is under a load even a low voltage load. "Lunacy!You still need to stop talking rubbish
Quote from: Bored chemist on 19/08/2012 13:50:16" Carbon brushes take voltage from white sparks, and transmits it through the birth of the carbon. I would not hold a carbon electrode, and connect or disconnect it under a load. I would also not connect or disconnect a rusty iron part while it is under a load even a low voltage load. "Lunacy!You still need to stop talking rubbishLunacy, BC?Well the first sentence would certainly suggest that. "Carbon" refers either to an elementary substance, that we would more usually call coke or graphite or charcoal or diamond, or to an element as such, when we say things like "carbon dioxide is 27% carbon and 73% oxygen". It is certainly not the sort of thing that can have a "birth" unless we are talking stellar fusion, supernova or big bang.But the rest of the passage you quote is one of the few parts of the essay where the poster is being quite rational. Behaving with excessive caution is usually not a bad thing, particularly when you understand so little about what you are handling as the poster clearly does.
You may also choose to look up making lye from wood ash. There should be lots of notes about it on the internet.I think I mentioned earlier that carbon fiber mesh would give you rather good surface area, although you may need some kind of structure to separate the cathode and anode.
"That was the "berth" of the carbon brush, the width of the elctrode. The diameter, the circular mills, or rectangular area. A typo my spell catcher does not catch."And who can blame if if you don't just use the wrong word, but you mis-spell it?...sorry, you cannot view external links. To see them, please
REGISTER or LOGINIt means the width of a ship or as we use it in America, the width of an object. What is occurring to me is that the people here have not been outside of their bubble lately. Get out there, just look for evey thing that can go wrong and then try some of this stuff. I was trying to give you everything that can go wrong, so you can experiment safely. Again you have stated as someone claiming to belong on a science forum that rust is not a danger if an ARC is formed with low voltage. You want to talk about bullocks, what you just stated, is nothing but that, nonsense. I use a high frequency initiation system, and high frequency continuous system. While standing in good work boots, I can run the torch over my hand and white sparks dance on my hand. It feels as if you were running a cotton swab over you your hand. I have over the years, had pieces of metal that were not grounded, like the aluminum welding rod that I hold in my bare hand, come in contact with the tungsten, electrode, and even get welded to to the tungsten electrode, while never getting a shock, from the continuous high frequency. Now comes the rust, when a piece is rusted, it is isolated from the grounded work piece. The rust is a dielectric, that isolates me from the piece as well. As the white high frequency spark, hits the rusty piece, I get hit with a heart wrenching amount of electricity. I actually threw a piece I was welding one day across the room, semi involuntarily when I initiated the high frequency. I was afraid of pulling tendons in my arm trying to keep from throwing it and just let my arm fling it across the room. It stuck in a wall. Ha-ha. So I am sure that rust makes a big difference, a huge difference in the way metal responds to high frequency. It seems to me that the whole rusted surface raised to the white spark voltage, mighty fast. And mighty painfully. So before you tell people not to worry about rust do some homework. Sincerely, William McCormick
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REGISTER or LOGINIt means the width of a ship or as we use it in America, the width of an object.
Quote from: William McCormick on 21/08/2012 03:48:27...sorry, you cannot view external links. To see them, please
REGISTER or LOGINIt means the width of a ship or as we use it in America, the width of an object. You might use the word "Breadth" to mean width.Girth is also used used to mean circumference.The width of a ship is its "Beam".If you talk too much about "Berth", people may think you're sleeping on the job.Rust (as well as paint) is not a good electrical conductor. And, thus I usually clean off a spot of clean metal before attaching my grounding clamp. And, everyone recommends cleaning your steel before welding. I don't use a welding table at this time, just clamp the ground to a clean spot on the work.Many power supplies fail to give you constant voltage. I wouldn't be surprised if your power supply produces essentially 0V when away from the metal (perhaps also adding high frequency).The high frequency (or scratch start) will start your arc, then you will have about 30V or so when welding. But, if you put it through a good resistor (bad contact with the metal or ground), you may in fact get a much higher voltage... 100V or so?It isn't the rust that is knocking your socks off, but rather your welder that is having troubles dealing with an abnormally high resistance circuit.You could probably verify by attaching a cheap (Harbor Freight) voltmeter between the electrode and the ground. Then striking an arc with a relatively poor ground connection.
William - this is an official mod note. Stop the non-mainstream rambling and pronouncements on the main boards. If you can answer questions with acknowledged and recognized science then please do so - and your anecdotes and notions would be welcome on the New Theories board, but please do not continue to post them here. I will start shrinking your posts if you continue.
I would love to know what I said about dielectrics that is not mainstream?I would love to know what I said about common welders that is not mainstream?
ARC used to stand for Anode, Rectified Cathode, Sincerely, William McCormick
Quote from: William McCormick on 22/08/2012 03:03:17ARC used to stand for Anode, Rectified Cathode, Sincerely, William McCormick LOL! Welders didn't buy your ARC theory on weldingweb.com, what makes you think actual scientists will accpet it here?I hope you don't contribute to Wikipedia too...
I hope you know that science has nothing to do with peer pressure at all. So your use of it defines, you as a poor scientist. That is just how it is. I know anyone can be a great scientist, you just have to have the courage to be yourself and form your own opinions, based on facts. No matter what ten, a hundred or ten billion think.
If you understand electricity you know the batteries are labeled backwards.
Quote from: William McCormick on 26/08/2012 20:26:55I hope you know that science has nothing to do with peer pressure at all. So your use of it defines, you as a poor scientist. That is just how it is. I know anyone can be a great scientist, you just have to have the courage to be yourself and form your own opinions, based on facts. No matter what ten, a hundred or ten billion think.Correct,Science isn't about peer pressure, although much of it is based on peer reviewed literature. And, if one has a novel idea, or an idea that goes against the norm, then the person must have the facts and data to back it up. So, for the most part science is more about data than opinion, although there is a grey area as one considers different interpretations of the data.Quote from: William McCormick on 26/08/2012 20:26:55If you understand electricity you know the batteries are labeled backwards. It isn't that batteries are labeled backwards. + or - is an arbitrary label.The problem is that in elementary electronics, electricity is often considered to flow from (+ to -), but later it was discovered that the elementary particles, protons carry a positive charge, and generally don't move (although they are used to transmit electricity in cells). And, that the electron is the subatomic particle with a negative charge that is most mobile. So, the flow of electrons is actually from (- to +)For many things flow from (+ to -) or (- to +) doesn't make a big difference as one needs a circuit, although it is a consideration that welders have to determine heat distribution.
For many things flow from (+ to -) or (- to +) doesn't make a big difference as one needs a circuit, although it is a consideration that welders have to determine heat distribution.