In The DC Welding,Do You Know The DC+ And DC-，how To Choose Them?

Before talking about DC+ and DC-,First, we need to understand the definition of DC welding machine connections. 

In China, the Base metal is used as the reference: when the Base Metal is connected to the positive terminal, it is called DC positive polarity (DC positive connection); 

when the Base metal is connected to the negative terminal, it is called DC reverse polarity (DC reverse connection). 

Internationally, the electrode is typically used as the reference: when the electrode is connected to the positive terminal, it is referred to as DC electrode positive (DCEP); 

when the electrode is connected to the negative terminal, it is referred to as DC electrode negative (DCEN)

Following we talking is based on the international standard.

DC+ (DCEP), or straight polarity, directs most heat to the electrode for shallower penetration and higher metal deposition, 

which is ideal for thin materials, non-ferrous metals, and stainless steel. The choice depends on the base metal's thickness, type, and the desired weld characteristics.