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Porosity | Inclusions | Incomplete Fusion | Inadequate Penetration | Cracks

Porosity
No. Defects Remedies

1.

Contamination of work piece

Clean joint area.

2.

Excessive moisture pickup in electrode covering

Store electrodes properly. Follow manufactures recommended rebaking procedure.

3.

Moisture of work surfaces

Use preheating / warm up work piece.

4.

High Sulphur content of base metal

Use basic coated electrode.

5.

a) Long arc length
b) Excessive current
c) Higher travel speed


Change welding parameters and technique.
Use preheat

6.

High solidification rate

Increase heat input.

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