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渗透检测(PT)对诸如裂纹、气孔等非连续性焊缝而言是一种高灵敏度的检测方法。检测时,被检测的非连续性焊缝表面必须是洁净和敞开的。该方法采用的是一种适用于焊缝表面的渗透液。在给定时间内让液体进入非连续性焊缝,然后将多余的液体清除,当渗透液从这些缺陷中流出并使显影液
Penetration testing (PT) is a highly sensitive test for non-continuous welds such as cracks and pores. During the test, the surface of the non-continuous weld to be tested must be clean and open. This method uses a permeate suitable for the weld surface. The liquid is allowed to enter the non-continuous weld at a given time and the excess liquid is then removed as permeate flows from these defects and causes the developer