ELECTROLYSIS
Rare-earth electrolysis molybdenum electrode
High-purity Mo ≥99.95% | Rod, plate or threaded | Molten-salt erosion resistant
WeiBeam · Electrode solutions for high-temperature melting
These electrodes are used in high-temperature molten-salt electrolysis cells for rare-earth metals. In fluoride melts, the electrode must withstand both high temperature and salt corrosion, and its conduction stability directly affects current efficiency and product quality. Purity and density requirements are high: molybdenum content is usually ≥99.95% to limit impurities entering the salt system, while a dense structure resists salt corrosion and keeps the process stable.
We customize these electrodes in rod, plate or threaded forms, with dimensions set by cell design and power supply. Sample testing and technical support are available.
In high-temperature melting and thermal-field systems this part is often used alongside electrodes elsewhere in the line. We recommend selecting them together against furnace structure, assembly method and working temperature to reduce thermal-expansion mismatch between different materials.
FEATURES
Rare-earth electrolysis molybdenum electrode — key features
Core characteristics for furnace conditions and operating requirements.
Molten-salt resistance
Dense, high-purity electrodes resist fluoride salt attack with low dissolution loss.
Good conductivity
Conductivity ≥30% IACS and resistivity about 0.053 µΩ·m support stable cell current.
High purity, low impurities
Mo ≥99.95% with impurities controlled to YS/T 1312-2019 to limit system interference.
Custom forms
Rod, plate and threaded electrodes built to cell design.
SPECIFICATIONS
Specification data
Electrodes are controlled to YS/T 1312-2019 and accepted under a mutual technical agreement. Special sizes can be customized to furnace conditions.
| Parameter | Specification |
|---|---|
| Process | Rare-earth molten-salt electrolysis, high-temperature cells |
| Form | Rod / plate / threaded electrode |
| Molybdenum content | ≥99.95% (higher purity customizable) |
| Density | ≥10.2 g/cm³ |
| Resistivity (20 °C) | ≈0.053 µΩ·m |
| Media | Fluoride molten salts and similar high-temperature electrolytes |
| Short-term limit | ≈1600 °C |
| Standard | YS/T 1312-2019 |
Material and physical properties
| Parameter | Typical value / note |
|---|---|
| Available grades | Mo1 (pure Mo) / MoLa (lanthanum-doped) / TZM (Ti-Zr-Mo) / Mo-Zr ODS |
| Molybdenum content | ≥99.95% (higher purity by technical agreement) |
| Density | ≥10.2 g/cm³ (varies slightly by grade and condition) |
| Melting point | ≈2620–2623 °C |
| Resistivity (20 °C) | ≈0.053 µΩ·m |
| Conductivity | ≥30% IACS |
| Thermal expansion | ≈5.25×10⁻⁶/°C |
| Elastic modulus | ≈315 GPa |
| Hardness | ≥85 HRB (by grade and condition) |
| Standards | Electrodes to YS/T 1312-2019; rods to ASTM B387 / GB/T 17792; plate and discs to ASTM B386 / GB/T 3876; other parts by technical agreement |
| Factory inspection | Spectral composition, density, metallography, ultrasonic inspection, dimensions and appearance |
| Delivery documents | Mill certificate with full batch traceability |
Typical values for pure molybdenum. MoLa, TZM and special sizes follow the mutual technical agreement and the test report supplied with each batch.
FAQ
Common questions
Selection, customization and quotation questions.
How are rare-earth electrolysis electrodes customized?
Customization requires the cell structure, current configuration, electrode dimensions and connection method. Provide drawings or parameters and we confirm material, diameter, length and thread form, with sample trials before batch supply where needed.
What purity does molten-salt electrolysis require?
Salt systems are sensitive to impurities, so Mo ≥99.95% is recommended to limit Si, Al, Fe, C and O, which helps stabilize electrolysis and product quality.
How is electrode loss controlled in molten-salt cells?
Loss depends on current density, salt chemistry and melt level. Controlling current density, keeping the level stable and using a dense structure help reduce loss and extend service life; the actual case should be evaluated on site.
CUSTOM
Selection and quotation
Share your furnace structure and process conditions. Our engineers will help select the right electrode and you can request a standard-size sample. We support export customers worldwide with remote technical coordination.