|
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. |
Conventional
