Rocks & mirror
Encyclopedia of Marine and Energy Technology

Magnetic particle test


A nondestructive testing technique using a mixture of iron filings in thin white paint which is spread over the surface to be examined. A large magnet is then attached over the area of interest and any discontinuities show up as concentrations of iron filings.

Further reading: ABS Guide for “Nondestructive Inspection of Hull Welds” (2002), can be downloaded from