PROCEDURE AND DEVICE FOR ELECTROCHEMICAL MECHANIZATION OF METALLIC MATERIALS AND PARTICULARLY OF THE INTERNAL SURFACE OF CUBA BOTTOM STEPS OF A NUCLEAR REACTOR.

摘要

AN ELECTROLYTE IS PASSED IN CIRCULATION BETWEEN THE SURFACE TO BE DEVELOPED CARRIED WITH A PLATE POTENTIAL AND A USEFUL ELECTRODE (9``) CARRIED WITH A CATHODIC POTENTIAL. THE ELECTROLYTE CONTAINS LITHIUM NITRATE AS A SOLE ACTIVE ELEMENT WITH A CONCENTRATION BETWEEN 20 G / L AND 2350 G / L AND PREFERABLY BETWEEN 50 G / L AND 250 G / L. THE PROCEDURE CAN BE APPLIED IN THE ELABORATION OF THE SURFACE OF ALL METAL PIECES AND IN PARTICULAR IN THE ELABORATION OF THE INTERNAL SURFACE OF TUBULAR PARTS (5) AS STEPS OF CONTAINER BOTTOM OR NUCLEAR REACTOR LID; IN THAT CASE, THE ELECTROCHEMICAL ELABORATION CELL IS CONSISTED OF A USEFUL CYLINDRICAL ELECTRODE (9 '') DISPOSED INSIDE THE PIECE TO BE DEVELOPED.