Page 51 - Liquid Penetration Inspection
P. 51

Diploma in Mechanical Engineering (Material)


                                              LIQUID PENETRATION INSPECTION




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                                               Liquid penetrant test





                                               1. Oil-whiting test


                                               2. Dye penetrant test
            The work piece is covered with a penetrating oil, such as
            kerosene, then rubbed dry and coated with dry whiting. In a


            short time, the oil that has seep into any cracks will be

            partially absorbed by the whiting producing plainly visible

            dis-coloured streaks delineating the cracks.






















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