Mechanism underlying the anodic oxidation of molybdenum and tungsten in nitrate-nitrite melts

Journal Article · Thu Mar 10 04:00:00 EST 1988 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6318396

Yurkinskii, V P; Firsova, E G; Morachevskii, A G

The method of plotting the anode volt-ampere curves with linear scanning of the potential and the method of coulometric measurements with the electrolysis in galvanostatic or potentiostatic conditions were used. The experiments were performed in an atmosphere of nitrogen. Polarization of the cell was effected with a P-5848 potentiostat. The volt-ampere curves and the current-time relationships were recorded on KSP-4 electronic potentiometer. The shapes of the anodic volt-ampere curves obtained from molybdenum and tungsten in nitrate-nitrite melts are shown. The distinct difference in the behavior of the molybdenum and the tungsten when sodium nitrite was added to the NaNo/sub 3/-KNO/sub 3/ melt was the pronounced shift of the steady-state potential into the region of the more negative values and the considerable increase in the currents in the region of the passive state of the metals.

• OSTI ID: 6318396
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 60:9; ISSN JAPUA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALKALI METAL COMPOUNDS
ANODES
CHEMICAL REACTIONS
CORROSION
CORROSIVE EFFECTS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CORROSION
ELECTRODES
ELECTROLYSIS
ELEMENTS
LYSIS
METALS
MOLTEN SALTS
MOLYBDENUM
NITRATES
NITRITES
NITROGEN COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PASSIVATION
PHYSICAL PROPERTIES
POLARIZATION
POTASSIUM COMPOUNDS
POTASSIUM NITRATES
SALTS
SODIUM COMPOUNDS
SODIUM NITRATES
TRANSITION ELEMENTS
TUNGSTEN
VOLTAMETRY