Causes of metal hose fracture

The reasons for the fracture of the metal hose were analyzed by means of macroscopic observation, chemical composition analysis, scanning electron microscopy and energy spectrum analysis, metallographic examination. The results show that the corrosive medium in the environment infiltrated into the inner layer of the metal hose. Under the combined action of corrosive medium and external force, intergranular stress corrosion cracking occurred in the inner layer, resulting in the fracture of the metal woven mesh and the thinning of the bellows, and finally fracture occured under the action of external force.