Nitrate and Molybdenum Electrode
Molybdenum electrode will be erosion if the molten glass contains a certain amount of nitrate. During operation, in order to ensure molybdenum electrode efficiency and service life should take some protection measures. Transitional protection measures of molybdenum electrode include anode passivation and low frequency current protection.
The chemical stability of molybdenum electrode in various medium
|O2||400℃ to oxidize, 700℃ or more to quick oxidize||Glass||1350℃ or less stable|
|H2||No reaction||C||1100℃ or more to produce carbide|
|N2||1500℃ or more nitridation||Aqua regia||100℃ or more quick erosion|
|Ar||Stable, no reaction||CO2||1200℃ start to oxidize|
|He||Stable, no reaction||Nitric acid||Unstable|
|H2O||700℃ or more to quick oxidize||Hydrochloric acid||Mild etching at room temperature|
|CO||1400℃ start to oxidize||Vitriol||Mild etching at room temperature|
|HF||Room temperature stable, high temperature mild erosion|
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