Of measuring method and the amount of hydrogen entering the metal part inside of a mobile penetration amount of hydrogen into the metal interior monitoring methods

摘要

PROBLEM TO BE SOLVED: To provide a method for accurately measuring an amount of hydrogen penetrated into metal having a coating formed thereon in different conditions.;SOLUTION: A method for measuring an amount of hydrogen penetrated into metal, includes: setting one side of a specimen to a penetration surface of hydrogen generated by a corrosion action due to exposure to a corrosive environment, and the other side thereof to a detection surface of hydrogen; measuring a hydrogen flux diffused to the detection surface as an anode current; disposing an electrochemical cell formed by a plurality of cell groups on the hydrogen detection surface side of the specimen; filling an electrolyte aqueous solution of pH 9-13 into each cell of the cell groups; independently placing a reference electrode and an opposite electrode; setting at least one cell of the cell groups to a reference cell for correcting a residual current; providing a protective film for blocking contact with the corrosive environment in a place corresponding to the hydrogen penetration surface side of the reference cell; correcting an anode current value detected in a cell except the reference cell by a residual-current value detected by the reference cell; and calculating a hydrogen amount penetrated from the corrosion surface side on the basis of the corrected anode current value.;COPYRIGHT: (C)2013,JPO&INPIT