What to do if the welding rod sticks to the surface?

Electrode sticking is a common problem in welding, especially for beginners, but it can be effectively avoided by adjusting operating techniques and equipment parameters.

I. Main Causes and Solutions

Insufficient Welding Current
Insufficient current is the most common cause of electrode sticking. When the current is lower than 30 amperes (e.g., electrode diameter × 30), the arc energy is insufficient, the electrode cannot melt fully, and it easily short-circuits and sticks to the base material.

Solution: Adjust the current according to the electrode diameter. For example, a current of around 110A is recommended for a 3.2mm electrode. Refer to "Welding current = electrode diameter × 40" as a starting value for adjustment.

Improper Arc Ignition Method
If the electrode is not lifted promptly after contact using the direct-strike method, or if the rubbing length is insufficient, electrode sticking will occur.

Recommended Method:

Rubbing Method: Like striking a match, rub the electrode across the workpiece surface for 10–15mm, then quickly lift it 2–4mm to ignite the arc.

**Point-touch method:** Lightly tap the workpiece vertically and quickly release 5-8mm. Suitable for space-constrained applications.

**Incorrect electrode angle:** A 90° angle between the electrode and the workpiece increases the risk of adhesion because the molten droplet transfer path aligns with gravity, leading to easy accumulation.

**Correct angle:** Maintaining a 70°-80° backward tilt angle between the electrode and the welding direction can reduce electrode adhesion by over 60%.

**Abnormal electrode condition:** Moisturized, damaged, or bent electrodes are highly prone to adhesion.

**Recommendations:** Dry basic electrodes at 150°C for 1 hour before use; Store in an insulated container to prevent moisture; Replace electrodes with new ones if more than 1/3 of the coating is damaged.

**Improper arc height control:** An arc that is too low (<0.5mm) easily causes short circuits and adhesion; an arc that is too high is unstable.

**Improper arc height control:** An arc that is too low (<0.5mm) easily causes short circuits and adhesion; an arc that is too high is unstable. Ideal arc length: Controlled between 0.5 and 1 times the electrode diameter, approximately 0.5 to 1 mm.

Inappropriate equipment parameter settings: Especially when welding basic electrodes (such as 507), appropriately increasing the thrust current can significantly reduce electrode sticking. The thrust current can superimpose an extra current during a short circuit, helping the molten droplet transfer smoothly.

Beginners can try adjusting the thrust current to level three or around 30A.