Difference in polarities
RSS | Subscribe | Contact Us | Advertise | About Us
Results 1 to 3 of 3
  1. #1

    Difference in polarities

    Hi there I was just wondering what the difference in polarities means exactly. What applications are better suited for which polarity. And is it better to use one over the other when just doing general welding in the shop. I am curious for mig and arc welding.

  2. #2
    Join Date
    Mar 2014
    Posts
    4,208

    Re: Difference in polarities

    Quote Originally Posted by Lnoland View Post
    Hi there I was just wondering what the difference in polarities means exactly. What applications are better suited for which polarity. And is it better to use one over the other when just doing general welding in the shop. I am curious for mig and arc welding.
    http://www.lincolnelectric.com/en-us...ty-detail.aspx

  3. #3
    Join Date
    Apr 2008
    Location
    NW ON Canada
    Posts
    2,866

    Re: Difference in polarities

    In welding school I was taught heat ratios with DC polarity.
    DC+ (reverse polarity) puts 70% of the heat in the electrode and 30% of the heat into the work. Most stick welding is done with DC reverse polarity.
    DC- (straight polarity) puts 30% of the heat into the electrode and 70% of the heat into the work. This is why you always DC tig weld with straight polarity, you would melt your tungsten away tig welding with DC reverse polarity.
    AC switches back and forth between DC + and DC - 60 cycles (hertz) per second.
    Jason
    Lincoln Idealarc 250 stick/tig
    Thermal Dynamics Cutmaster 52
    Miller Bluestar 2E
    Torchmate CNC table
    Ironworkers Local 720

    Owner/Operator Devlin Metal Works
    Custom CNC Plasma Cutting and Welding

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
RSS | Home | Penton Media | Contact Us | Subscribe | For Advertisers | Terms of Use | Privacy Statement