Detect surface defects in alloy materials.
Penetrant testing – Based on the properties of capillary action, or the phenomenon of a liquid rising or climbing when confined to a small opening due to surface wetting properties of the liquid, Penetrant testing is used for finding surface breaking discontinuities on relatively smooth, nonporous surfaces. The types of defects that can be found with Penetrant inspection are:
The basic procedure that is followed to perform liquid penetrant testing consist of the following:
- Rolled Products: Penetrant identifies anomalies (cracks, seams or laminations)
- Castings: cold shuts, hot tears, porosity, blow holes or shrinkage
- Forgings: Illuminating cracks, laps or external bursts
- Welds: To identify cracks, porosity, undercut, overlap, lack of fusion or lack of penetration