METHOD DETERMINING RESISTANCE OF METAL OF UNDERGROUND PIPE-LINES TO STRESS CORROSION Russian patent published in 2004 - IPC

FIELD: evaluation of bearing capacity of metal of pipes subjected to hydrogenation by means of electrochemical analysis. SUBSTANCE: method determining resistance of metal of underground pipe-lines is realized by measurement of indirect parameters characterizing the latter and runs as follows. Electrode potential of metal or alloy is tested with the help of comparison electrode, deviation of potential from values established by Purbeck diagram is used to compute hydrogen pressure in metal correlatable with its bearing capacity and to make judgment on resistance of metal of diagnosed pipe-line to stress corrosion. EFFECT: capability to establish resistance of metal to stress corrosion by nondestructive testing. 2 dwg