What is Reverse Polarity in Welding?

Welding current can be direct current (DC) or alternating current (AC). The majority of welding done today is DC, and most of that is with the electrode connected to the negative pole, or work lead. This arrangement is called straight, or reverse polarity.

When AC welding, the electrode may be connected to either the positive or negative pole of the welding arc. This connection is called reverse polarity. The basic difference between the two types of current is that DC flows in one direction only, while AC alternates in direction.

The choice of current type and polarity depends on the type of welding being done, the metals being welded, and the welding electrode being used.

DC welding is most commonly used for welding ferrous metals, such as iron and steel. The main advantage of DC over AC is that it produces a more stable arc. This makes it easier to weld in all positions, including vertical and overhead.

AC welding is mostly used for aluminum and stainless steel. The advantage of AC over DC is that it produces less spatter and cleaner welds.

The type of electrode being used will also dictate the choice of current and polarity. For example, when using a covered electrode, DC reverse polarity should be used. This will produce a softer arc and less spatter.

What is the difference between straight and reverse polarity?

The main difference between straight and reverse polarity is that, with straight polarity, the work lead is connected to the negative pole of the welding arc and the electrode is connected to the positive pole. With reverse polarity, the electrode is connected to the negative pole of the welding arc.

What does DC reverse polarity mean?

DC reverse polarity means that the electrode is connected to the negative pole of the welding arc. This arrangement is used when welding with a covered electrode. It produces a softer arc and less spatter.