Nondestructive testing apparatus for pipeline joint anticorrosive coating

The invention provides a nondestructive testing apparatus for the bonding quality of a pipeline joint anticorrosive coating. The testing apparatus is composed of a foundation framework, a running gear, an adsorption mechanism and sensor clamping mechanisms, wherein the foundation framework is the support for the running gear, the adsorption mechanism and the sensor clamping mechanisms, the running gear is a power part driving the apparatus to walk, and the sensor clamping mechanisms are used for fixing testing sensors. The testing apparatus is absorbed at a pipeline joint; the adsorption bases of the adsorption mechanism are installed at two sides of the pipeline joint anticorrosive coating (9), and the rest parts of the adsorption mechanism, the foundation framework and the running gear compose the support moving around the circumference of the pipeline joint anticorrosive coating (9); the running gear is mounted at one end of the foundation framework, and the sensor clamping mechanisms are mounted at the central part and two ends of the foundation framework. The nondestructive testing apparatus provided by the invention carries out fast scanning measurement on the bonding quality of the pipeline joint without destroy to the pipeline joint anticorrosive coating, especially on the bonding force, and has the advantages of high testing efficiency, strong adaptive capability and accurate quantification of defects.