Electrode polarization studies in molten Na/sub 2/CO/sub 3/ at 1000/sup 0/C under CO/CO/sub 2//H/sub 2//H/sub 2/S atmospheres

Thesis/Dissertation · Tue Jan 01 00:00:00 EST 1985

OSTI ID:6466828

Yeum, K S

The reactions occurring on Ni-200, Armco iron and types 304 and 316 stainless steel in molten Na/sub 2/CO/sub 3/ at 1000/sup 0/C under controlled H/sub 2//H/sub 2/S/CO/CO/sub 2/ environments were studied by electrode polarization. A polarization curve obtained as a plot of logarithm of current versus potential was modelled with superposed effects from multiple reactions. The current contributed by each reaction was expressed in terms of potential and several kinetic parameters, and then equations describing all reactions were numerically solved to determine the optimum values of the parameters. The environmental dependence of some of these parameters was interpreted with reaction mechanisms and was supplemented with observation and analysis of reaction products. For Co, CO/sub 2//Ni electrodes, one cathodic reaction and six anodic reactions were observed on a polarization curve. The effects of H/sub 2/ and H/sub 2/S additions on the reactions were determined by varying the amounts of the additions. For Armco iron, and types 304 and 316 stainless steel electrodes, one cathodic reaction and two anodic reactions were observed.

• Research Organization: Connecticut Univ., Storrs (USA)
• OSTI ID: 6466828
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROCHEMICAL CORROSION
IRON
NICKEL
SODIUM CARBONATES
CORROSIVE EFFECTS
STAINLESS STEEL-304
STAINLESS STEEL-316
ALKALI METAL COMPOUNDS
ALLOYS
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
ELEMENTS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
METALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
OXYGEN COMPOUNDS
SODIUM COMPOUNDS
STAINLESS STEELS
STEELS
TRANSITION ELEMENTS
300505* - Fuel Cells- Electrochemistry
Mass Transfer & Thermodynamics
360105 - Metals & Alloys- Corrosion & Erosion
400400 - Electrochemistry