Uber die anwendung intermittierender entladungen zur elektrochemischen bestimmung der depolarisationsfähigkeit des braunsteins

Abstract

At present, the method of intermittent discharge, based upon the discharge of technical cells, is used for the determination of the depolarizing capacity of manganese dioxide. The method used up to now has the disadvantage that testing takes a month to carry out.The method worked out by us, using an intermittent discharge, makes it possible to determine the depolarizing properties within about five hours.Our method is based upon the cathodic polarization of the magnanese dioxide under test in the test cell which was described in Electrochim. Acta1, 336 (1959).The intermittent discharge takes place with the aid of a device which switches automatically from “discharge” to “resting period”. The discharge time is adjustable between 0 and 60 sec, and the resting period between 0 and 120 sec. The short testing time avoids side effects such as, for example, zinc corrosion.It was proved that the effect of the constituents of the depolarization material and the electrolyte on the electrical capacity varies for conditions of intermittent and continuous discharges.