Both use electrical current to melt the base metal and the filler metal. Both could be considered ARC welding. Most welding is done with an electrode (stick) and as the electrode becomes consumed the weldor has to stop and replace it with a new one. MIG welding uses a spool of wire and can be run for hours on end. MIG is usually easier to learn.

There are no , non -consumable electrodes, there are slower consumed electrodes, as in TIG (tungsten inert gas) welding in which a Tungsten electrode is used , and in the hands of a very skilled welder , last the longest of all electrodes , but are in the end consumed.

Nope. It's the other way around. (the lower the number, the thicker the steel).

s.m.a.w. shielded metal arc welding

sub-mersible welding machine using reverse polaity. miller welding company as well as Lincoln specialize and sell welding equipment. for more info contact the Ocean Corp in Houston tx.

There's only been one incident involving an actual death during the process of underwater welding, which happened in 1943 when a student was wet welding.

The potential danger from electric current during underwater welding is extremely low because the welder-diver is grounded. It's also direct current (DC), not alternating current (AC), so it's focused at the weld site.

Other dangers to underwater welders (commercial divers) are more prevalent, including decompression sickness and drowning. I outline these dangers in my article: waterwelders.com/zap-bang-pop-hazards-safety-measures-of-underwater-welding/

As long as he follows all the rules he will have a normal life span.

If you are looking for a class where you can learn underwater welding then you can do this through a company called Interdive Services. This is a three week course resulting in a professional qualification.

250 amps

to be a welder you must have very steady hands and good eye focus also you must know what process you are doing and what the reactions of this process are