Aluminum Alloy Body Repair - Crack Inspection
1. Crack Inspection

Always do crack inspections on aluminum alloy using a dye penetrant testing after welding and correction processes.

Penetrant Test:

Dye penetrant uses its capillary action and strong penetration capability to reveal minute cracks and defects that cannot be seen during visual inspection.


Dye Penetrant Testing Method:

Use a dye penetrant with a high contrast color against the developer in a well lit area for better visibility.
Inspection Steps:
1.
Prepare penetrant, developer and remover.
2.
Clean dye and developer from the inspection areas using the remover.
3.
Apply penetrant in the inspection areas. Let it stand for a period of time to allow it to soak into the surface.
4.
Remove excess penetrant from the inspection areas.
5.
Apply developer to the inspection areas. Cracks will be detected by a color change.