## When welding with DCEP the electrode is positive and the work is negative?

The direction of current flow through a welding circuit when the electrode lead is connected to the positive terminal of the power source and the work is connected to the negative terminal.

## Do you Weld 7018 AC or DC?

The 7018 welding rods are used for pipe welding and structural steel welding and repair welding. This low-hydrogen, usually DC, all-position electrode can also be used with AC, which not many welders may know. The 7018 provides a good bead appearance and smooth, strong welds.

## How many amps is a 7018 Rod?

In general, the 7018 rod is used with currents up to 225 amps. A rule of thumb is to use 30 amps of current per 1/32 inch of rod diameter. That would mean using 90 amps of current on a rod that is 3/32-inch in diameter.

## What polarity is used for SMAW?

Direct current electrode positive (DCEP) is what we used to call reverse polarity. Direct current electrode negative (DCEN) is what we used to call straight polarity.

## What polarity is used for GTAW?

Negative polarity

Reverse Polarity

## What is direct current straight polarity?

Direct Current Straight Polarity—occurs when electrode is made negative and base plates are made positive. Thus electrons flow from electrode tip to base plates. Direct Current Reverse Polarity—occurs when electrode is made positive and base plates are made negative. Thus electrons flow from base plates to electrode.

reverse polarity

## What polarity is used for welding mild steel?

The high cellulose covered mild-steel rod, such as Fleetweld 5P or Fleetweld 5P+, is recommended for use on positive polarity for general welding. Some types of shielded electrodes function on either polarity, though some operate on only one polarity.

## Which electrode is used in MIG welding?

The principles of a MIG welding “gun” The metal inert gas (MIG) process uses a consumable electrode, which is usually in the form of a copper-coated coiled wire. Argon is used to shield the weld, and direct current with the electrode being positive to generate more heat for melting.