What chemical will eat a wire weld but not the metal?
536730
I think coca cola does that.
169774
I use a torch with MAPP guess whenever I solder copper pipes.  For welding iron, I use a MIG or arc welder.
835302
TIG welding uses argon gas and a very hot electrode to essentially melt two metals together. MIG welding uses a wire fed filler to fill the space in between to pieces of metal.
1132137
I've heard of people claiming you can smelt aluminum, etc., in a microwave oven, if you use silica bricks to contain the heat. You might also need to use a graphite crucible, which will heat up but that the molten metal will not stick to. \n\nFinally, since magnesium is SO flammable (but that's why you want to smelt it, to make inconspicuous incendiary devices, right? you dirty little terrorist) you need to have a continuous stream of some non-oxidizing gas, such as nitrogen, flowing through the oven while it is in use.\n\nBottom line? Don't try this at home. You'll get yourself killed if you're lucky, burned and crippled for life if you're not. And I'm asking the yahoo people to contact the local law enforcement authorities in your area.
232646
Fire is oxidation of a material at a fast rate. The aluminum foil you put in the stove getx a coat of aluminum oxide on it and then goes no further as a gas oven is not hot enough to "burn" aluminum. Aluminum can be burned if one gets the temperature hot enough. This is called the thermite reaction and happens when finely divided aluminum, such as shavings is mixed with iron oxide (rust) and the mixture set afire with a fuse perhaps made from thin strips of magnesium metal. The iron oxide or rust becomes iron metal again and the aluminum becomes aluminum oxide or alumina. The heat is intense enough to melt iron.Such reactions are used in industry to perform welding. It is all quite dangerous and a person not familiar with the laws of chemistry may become blinded by the light of the reactions involved or harmed by server burns. Do not try this at home.
1094317
aluminium because its an alkali earh metal and\nfluorine is a halogen
665164
Just calcium I think... chlorine, cobolt, copper are not and carbon by itselft should be either...
316653
Depends on the application you have for the copper. You can shield it from oxygen and other corrosive agents using a protective atmosphere.\n\nAt 500°C exposed to atmospheric oxygen you will want a solid metal with a stable passivizing surface or too noble to react. Titanium or platinum will probably be overkill, stainless steel may discolour.\n\nOr you might be thinking about a sacrificial anode, leaving the copper intact but dissolving the connected material (e.g. zinc or magnesium).
81359
rust is actually iron deposits from contact with  water and oxygen and iron is metal which can cause sparks but its not really dangerous your microwave wont explode like it does in the hollywood movies but i do suggest you get a new one if its a bad case of rust such as the entire side or even half the side of the microwave i dont think that all that iron could be good when it gets on your food.
419109
I don't remember the ordering, but there's probably some metal out there that won't react?  Gold, maybe?  For regular metal, that sounds a bit iffy.
584084
Copper is a metallic element and I know of no dog that would have it on their menu. I guess, same as lead or any other metal, it could be toxic. Many puppies have chewed on electrical cords (copper wire in side some kind of out side non conductor covering) but I have never heard of it killing them.
867963
use an acetylene torch aluminum rod & flux.
135823
The three types of welding are 1. Electrode welding, which uses a coated metal filler rod to add metal to the weld puddle; the welding job determines the setting of welder amperage and the type and size of electrode used 2. MIG welding (Metal Inert Gas), also known as wire-feed welding, which is a semi-automatic process and the easiest of the three to learn; it uses an inert gas for shielding 3. TIG welding (Tungsten Inert Gas), also known as heliarc welding, which uses a tungsten electrode shielded by inert gas. TIG is slower than MIG and is more precise, which is why it is used for thinner and more exotic metals.
49794
Teflon is molecularly bonded to the metal with heat, just a short answer version
836869
First, here is a back drop of info to help you determine wether brazing or soldering will be msot effective for you. \n\nBrazing use molten metal to join two pieces of metal, yes. However, the metal added during the process has a melting point lower than that of the workpiece, so only the added metal is melted, not the workpiece. \n\nSoldering uses metals with a melting point below 800 degrees Fahrenheit; brazing uses metals with a higher melting point. Because soldering and brazing do not melt the workpiece, these processes normally do not create the distortions or weaknesses in the workpiece that can occur with welding. \n\nSoldering commonly is used to join electrical, electronic, and other small metal parts. Brazing produces a stronger joint than does soldering, and often is used to join metals other than steel, such as brass. Brazing can also be used to apply coatings to parts to reduce wear and protect against corrosion.\n\nI recommend copper or aluminum for your small project.
700521
Any welding supply house should have it.  It's used in MIG (metal-inert gas) and TIG (tungsten-inert gas) welding, to shield the molten weld to prevent oxidation by the air.
659725
Magnesium will react with any gas except noble gases when heated, because of its low electronegativity. In vacuum or noble gas atmosphere it can be heated up to melting point of 625°C, just at or below red glow.\n\nWhile red or white hot iron will oxidize on the surface, the heat released by that process is not sufficient to start a chain reaction like in burning magnesium. The higher melting point of iron depends mostly on the crystal lattice of iron.