Penetration Testing

The penetrant will enter the open defects on the surface of the object under capillary action. After removing the excess penetrant on the surface and applying the developer, the penetrant in the defects will also precipitate under capillary action. By observing the characteristics displayed by the precipitated penetrant, the surface opening defects of the object can be evaluated. Penetrant testing is simple to operate and the test results are intuitive and easy to use. It is suitable for defect detection of surface openings, but it cannot be used for porous materials. Penetrant testing objects: non-porous materials

coloring method : The coloring method (V) only needs to be carried out under white light and daylight, and works in a place without water or electricity.
1. Washable coloring method (VA): suitable for inspecting parts with rough surfaces and less demanding requirements. The flaw detection sensitivity is low and it is difficult to find subtle defects.
2. Post-emulsification coloring method (VB): widely used; highly sensitive, suitable for inspecting more precise parts.
Fluorescence method : The fluorescence method (F) requires a UV lamp and a dark room, and cannot work in places without electricity.
1. Water-washed fluorescence method (FA)
2. Post-emulsification fluorescence method (FB)

●Domestic standards: NB/T 47013, GB/T 18851, GB/T 26953, GB/T 9443, JB/T 9218, etc.
●International/EU standards: ISO 3452, ISO 4987, EN 10228-2, EN 1371, ISO 23277, etc.
●American standards: ASTM E1417, ASTM E165, ASTM E433, ASTM A903, etc.

Zhongke Testing is the pioneer and leader in third-party non-destructive testing and verification services in China. It provides comprehensive non-destructive testing system solutions for steel structure engineering (buildings, power plants, etc.), boilers, pressure vessels, pipelines, bridges, wind power, thermal power engineering ships and offshore facilities, motor vehicles, hoisting machinery, iron towers, amusement facilities and many other industries. It has successfully tested various parts, structural parts and equipment, and has effectively promoted the harmonious and rapid development of customers and industries. Penetrant testing is widely used to inspect surface defects in ferrous and non-ferrous metal forgings, castings, welding parts, machined parts, and ceramics, glass, plastics, etc.