o1Liquid penetranttesting is a suitable method for almost an

o1:-Liquid penetranttesting is a suitable method for almost any material. What can not be inspected by liquid penetrant testing method?

Solution

LIQUID PENETRANT TEST IS AN NDT(NON DESTRUCTIVE TEST) METHOD THAT UTILIZES THE PRINCIPLE OF CAPILLARY ACTION IN WHICH LIQUID OF SUITABLE PHYSICAL PROPERTIES CAN PENETRATE DEEP INTO EXTREAMLY FINE CRACKS OR PITTING THAT ARE OPENED TO THE SURFACE.BUT IT IS ONLY LIMITED TO DETECTION OF SURFACE BREAKING DISCONTINUITY. PENETRANT TESTING SHOULD NOT BE DONE ON POROUS SURFACE ,AS THE PORES WILL ACT AS DISCONTINUITIES TO TRAP PENETRANTS AND PREVENT ACCURATE INSPECTION . IT IS ALSO NOT RECOMMENDED FOR HIGHLY IRREGULAR SURFACES AS IRREGULAR SURFACE MAY CAUSE THE PRESENCE OF NON-RELEVANT INDICATIONS