why is hydrogen used in welding of high melting metals

Dear Sapala Vemula,

                    Hydrogen is used in welding of high melting of metals because in welding it reacts with oxygen and release high amount of energy.This is the reason for why hydrogen used  in welding.Thank you.

hellow

            when hydrogen reacts with oxygen to give high amount of energy.that energy is lutillised for welding metals.this is the reason for using hydrogen.

actually the bond energy of dihydrogen is very strong because of which when atomic hydrogen reacts and gives dihydrogen with a good amount of heat energy. so in hydrogen torch using electric arc is used to break bond between hydrogen atoms in dihydrogen, which when combine again near metal which is to be weld release a good amount of het sufficient to melt the metalfor welding. In hydrogen torch hydrogen do not reacts with oxygen but this hydrogen’s reaction with oxygen is utilised in hydrogen-oxygen uel cell in rockets.but in weld bond between two hydrogen breaks and forms again giving a good amount of heat sufficient for welding

sorry it was “release a good amount of heat sufficient to melt the metal for welding”  and “ hydrogen-oxygen fuel cell”

Dihydrogen dissociates to atomic hydrogen with the help of an electric arc which generates temperature 4000k when allowed to recombine on the surface ,to be welded.so di hydrogen used in welding of high melting metals

Atomic hydrogen and oxy hydrogen torches find use for cutting and welding purposes. Atomic hydrogen produced by dissociation of dihydrogen with the help of an electric arc are allowed to recombine on the surface to be welded to generate the temperature of 4000k