Direct current vs alternating current

Direct current vs alternating current

Regardless of the type of welding which you are using, the specifics of the welding machine, or which welding rod type you have chosen, you should always follow the manufacturer’s guidelines. That said, as a general rule, most shielded arc electrodes are designed for direct current use, but can also be used with alternating current.

Direct current is suitable for jobs which use one carbon electrode because the welding rod will have the longest possible life. Alternating current, on the other hand, is recommended for jobs which use two carbon electrodes, because it allows the welding process to run very smoothly and regularly.

In order to maintain your equipment, it’s essential that you store your electrodes in a place where they’ll be flat, straight and bone dry. This is because bending and moisture can damage the coating (unless you’re using a bare electrode), which will ultimately lead to ineffective electrodes and weak, porous welds. If your electrodes are exposed to moisture, they should be placed in a very hot oven to dry them out completely.