Which statement best describes E6010 polarity and penetration?

Which statement best describes E6010 polarity and penetration?

• A. Deep penetration with DC reverse polarity only
• B. Shallow penetration with AC
• C. Moderate penetration with DC straight polarity
• D. Deep penetration with DC straight polarity

Answer: (A)

Polarity influences how heat is directed in the arc and how penetrating the weld will be. The E6010 coating is a cellulose-sodium type that produces a deep, narrow, penetrating arc when used with direct current in reverse polarity. That setup pushes more heat into the workpiece and yields strong root penetration, which is why it’s favored for joints that require deep penetration. Using AC or straight polarity tends to give shallower penetration with this electrode, so the description of deep penetration with DC reverse polarity best matches how E6010 behaves.

Polarity influences how heat is directed in the arc and how penetrating the weld will be. The E6010 coating is a cellulose-sodium type that produces a deep, narrow, penetrating arc when used with direct current in reverse polarity. That setup pushes more heat into the workpiece and yields strong root penetration, which is why it’s favored for joints that require deep penetration. Using AC or straight polarity tends to give shallower penetration with this electrode, so the description of deep penetration with DC reverse polarity best matches how E6010 behaves.