Abstract
A new electrode, Mo/Mo/MoO2 has been proposed for the purpose of better control of corrosion inhibition of constructive materials in adsorption refrigeration systems. The electrode is prepared by heating a molybdenum rod in air at 873K followed by reduction in hydrogen at 723K. The potential of the electrode was stable in LiBr solutions of wide range of temperature (298-428K), concentrations of LiBr (2, 17.3mol kg-1), LiOH (10-3-10-1mol kg-1), Li2MoO4 (10-4-10-2mol kg-1) and LiNO3 (0-10-2mol kg-1). The potential of the electrode responded to the concentration of LiOH while not to those of Li2MoO4 and LiNO3. The electrode potential was changed sharply by introducing oxygen into the solution at 353K in 2mol kg-1 LiBr solution. But it became less clear at 428K in 17.3mol kg-1 LiBr solution. The electrode can be used as a sensor for the concentration of LiOH. Another application of the electrode would be a quasi internal reference electrode in a commercial machine for the monitoring of corrosion potential of steels.
