Atomic Hydrogen Welding (AHW) is an arc welding process that uses an arc between two metal tungsten electrodes in a shielding atmosphere of hydrogen and without the application of pressure. Shielding is obtained from the hydrogen. Filler metal may or may not be used. In this process, the arc is maintained entirely independent of the work or parts being welded. The work is a part of the electrical circuit only to the extent that a portion of the arc comes in contact with the work, at which time a voltage exists between the work and each electrode. Manual Metal Arc welding, also known as stick or MMA welding is one of the most common forms of welding. ... General Name, Symbol, Number tungsten, W, 74 Chemical series transition metals Group, Period, Block 6, 6, d Appearance grayish white, lustrous Atomic mass 183. ... An electrode is a conductor used to make contact with a nonmetallic part of a circuit (e. ... General Name, Symbol, Number hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1, 1, s Appearance colorless Atomic mass 1. ... The use of water pressure - the Captain Cook Memorial Jet in Lake Burley Griffin, Canberra. ... A filler metal is a metal added in the making of a joint through welding, brazing, or soldering. ... There are many kinds of circuit An electric circuit interconnects electrical elements or electronic elements together usually to perform some useful function. ...

Sources

• Welding Handbook Vol. 2 Library of Congress number 90-085465 copyright 1991 by American Welding Society