DTIC AD0289005: CORROSION STUDIES IN MOLTEN ALKALI CARBONATES. PART 1. SILVER METAL

by: Defense Technical Information Center

Publication date: 1962-10-01

Topics: DTIC Archive, JANZ, G J, RENSSELAER POLYTECHNIC INST TROY NY, *CORROSION, *SILVER, *CARBONATES, *ALKALI METAL COMPOUNDS, IONS, THERMODYNAMICS, HIGH TEMPERATURE, SODIUM COMPOUNDS, EUTECTICS, POTASSIUM COMPOUNDS, LITHIUM COMPOUNDS, MELTING, SALTS, SOLUBILITY,

Collection: dticarchive; additional_collections

Language: English

The corrosion of Ag in the molten ternary eutectic mixture of Li2CO3, Na2CO3 and K2CO3 over the 600900 C temperature range was investigated by the weight loss technique. A limited but finite Ag solubility is noted for non- faradaic or noelectrical-load type measurements. With an anodic current imposed, a solubility of Ag that correl-ATES WELL WITH THE FARADAIC PREDICTIONS IS FOUND. The thermodynamic method is applied to predict the saturation solubility of Ag+ ions in carbonate melts. While the assumption of solution of Ag as the non-oxidized metal is not ruled out, the view is advanced that dissolution observed on the non-faradaic corrosion experiments is most probably due to the presence of an oxidizing agent, such as oxygen, dissolved in small amounts in the molten carbonates.