Atomic Hydrogen welding

Atomic Hydrogen welding

The atomic hydrogen welding process is an arc welding process wherein, welding is carried out by heating the work, with an electric arc between two tungsten electrodes. Hydrogen gas acts as a shielding gas in this process. In this process, the filler metal is used depending on the requirement of the workpiece.

Atomic hydrogen welding
Atomic Hydrogen welding torch

In this process, the workpiece is not used as an electrical circuit, like other arc welding processes, rather the arc is generated between two tungsten electrodes, and the welding process is carried out through its flame.


In fact, the atomic hydrogen welding process is accomplished by using combinatorial energy of electric arc and the chemical reaction of hydrogen. The molecular hydrogen passes through the electric arc and it dissociates into atomic hydrogen by absorbing the energy supplied by the arc.


The hydrogen atom thus formed is unstable and has a tendency to return to the molecular state. This recombination occurs when the atom reaches a relatively cooler region outside the arc boundary or the atom touches a relatively cold workpiece to be welded.

Recombination is an exothermic reaction that releases a large amount of heat (about 3730 ° C) that joins the welding arc…

To be Continued……