METHOD FOR NON-DESTRUCTIVE DEFECTOSCOPY OF ALUMINUM ELECTROLYSER ANODE Russian patent published in 2019 - IPC G01N27/20 

FIELD: defectoscopy.

SUBSTANCE: use for nondestructive flaw detection of anode of aluminum electrolytic cell. Summary of invention consists in the fact that construction of design model of anode (or use of preset) with known data on geometry and specific resistance of anode, geometry and coordinates of internal defects, at that series of cyclic calculations is performed, calculation results are displayed in form of 3D matrix of amplitudes and directions of vectors of design strengths or inductions of an electromagnetic field at sampling points near the anode outer surface, placing on the external surface of the flaw detection anode at least a pair of electrically conducting contacts passing through the anode a predetermined value of electric current, placing at least one sensor at the outer surface of the defectoscopable anode and measuring the amplitude and direction of the magnetic field strength or induction vectors and displaying them in form of 3D matrix of measured intensity vectors or magnetic field induction, 3D matrices of calculated and measured intensity vectors or magnetic field induction are compared in identical sampling points near anode outer surface, and results are used to observe dimensions and coordinates of internal defects.

EFFECT: high information value of determining the location of defects, broader technological capabilities of the method by reducing instability of transition resistances of the contact area in the nest receptacles of the anode, high authenticity and reliability of flaw detection by measuring magnetic field strength vectors using contactless sensors.

7 cl, 6 dwg