Straight polarity or
electrode negative (DCEN)
In straight polarity the
electrode is connected to the negative and the work to the positive terminal of
the power source.
Straight polarity is used
for:
-
welding with bare light coated and medium coated electrodes
-
welding the thicker sections in down hand position to obtain more base metal
fusion and penetration.
Reverse polarity or electrode positive
(DCEP)
In reverse polarity the
electrode is connected to the positive and the work to the negative terminal of
the power source.
Reverse polarity is used
for:
-
welding of non-ferrous metals
-
welding of cast iron
-
welding with heavy and super[1]heavy
coated electrodes
-
welding in horizontal, vertical and overhead positions
-
sheet metal welding.
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