How does Underwater Welding Work: Wet Welding
Underwater dry welding may theoretically use any welding type that surface welders use.
Underwater wet welding primarily uses shielded metal arc welding (SMAW).
The welder works completely surrounded by water – including their electrode.
Under the Microscope: How Electrons Affect the Process
How does underwater welding work up close?
First, you should understand what’s happening with the electrode at the molecular level.
The heat distribution of the electrode to the weld area is extremely important, and it’s controlled through charged electrons.
There are three primary areas of heat movement:
• Cathode (electrode)
• Anode (weld area)
• Plasma (gaseous cylinder through which the electric arc travels)
The cathode is negatively charged, and the anode is positively charged. Therefore, when the underwater welder strikes an arc, the electrons from the cathode travel down toward opposite polarity (the anode). At the same time, positive ions are moving up toward the cathode.
This massive particle movement generates an enormous amount of energy and heat. The arc heats up plenty: Over 5,000 °C. But the heat is not evenly spread through the work area. About 66% of it goes to the anode. The other portion remains at the tip of the cathode.


Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.