penetration dumb question

[j.trevor123]

Okay so dcep has the most penetration.. AC about 50/50 (cleaning and pen) and Dcen has least penetration correct?? So heres a question how come... Is it correct that negative ions create the cleaning action and positive the penetration( or vice versa) I know dcep 70% of the heat is on the rod and EN 70% is on the metal.. OKay so scientifically how come diff polarities have diff penetration?

[David R]

Read this then ask your question.

http://www.weldingweb.com/showthread.php?t=18720

David

[j.trevor123]

Well I am talking about SMAW.. Im just curious as to 70% of the heat on the filler metal(dcep) pentrates better than 70% on the base metal(dcen)? Maybe its simply because 70% of the heat on the base metal is distriputed and does not allow as much penetration?

[Go1lum]

Yes in Stick and mig dcep gives max penetration. In TIG DCEN gives max penetration and DCEP gives cleaning action.