![]() As a standard technique, the temperature of the penetrant and the surface of the part to be processed should not be below 40☏ (5☌) nor above 125☏ (52☌) throughout the examination period.drying of the surfaces to be examined should be accomplished by normal evaporation or with forced hot or cold air after Precleaning. ![]() Prior to the application of the penetrant, it should be ensured that the cleaning solution has evaporated.Note: Cleaning operations like power wire brushing, grit blasting, shot peening and other metal smearing operations must be avoided. Degreasing and ultrasonic cleaning methods can also be used. Typical cleaning agents which can be used are detergents, organic solvents, descaling solutions, and paint removers. ![]() (25 mm) becomes dry and free of all dirt, grease, lint, scale, welding flux, weld spatter, paint, oil, and other extraneous matter that could obscure surface openings or otherwise interfere with the examination. ![]()
0 Comments
Leave a Reply. |