Online verification method and system for permeation-based nondestructive metal defect detection

The invention belongs to the technical field of online verification for nondestructive metal defect detection, and particularly relates to an online verification method for permeation-based nondestructive metal defect detection. The invention further provides an online verification system for the permeation-based nondestructive metal defect detection. The online verification method comprises the following steps: performing pre-cleaning treatment, filling with a penetrant, immersing by using an emulsifier, drying the penetrant, spraying an imaging agent, and evaluating and displaying a defect.Through the online verification method and the online verification system, the problems that the existing nondestructive detection technology is not complete, systematic and practical because the conventional nondestructive detection method cannot meet requirements of modern metal detection and a suitable new metal detection method does not exist in the prior art are solved, and beneficial technical effects that the nonde