Residue-Free Lubricants for Flawless Extrusion
Subsequent processing steps like bright annealing and capillary brazing demand absolute surface purity. Our advanced synthetic ester compounds are engineered for complete, clean pyrolytic decomposition, eliminating the need for aggressive post-extrusion cleaning protocols.
The Chemistry of Clean Pyrolysis
In high-value metal extrusion—particularly copper tubing for medical gases or ACR (Air Conditioning and Refrigeration)—internal surface contamination is unacceptable. Conventional mineral oils crack at high temperatures, leaving behind complex carbon deposits and heavy ashes.
These residues bake into the metal matrix during subsequent annealing processes. The resulting "annealing stains" (Glühflecken) not only compromise the aesthetic quality but fundamentally alter surface energy, leading to catastrophic failures in capillary soldering joints due to poor wetting behavior.
Controlled Molecular Decomposition
PROMET solves this through precise molecular design. Our copper tube extrusion lubricants are built on pure synthetic esters that possess a sharp, predictable pyrolysis threshold (typically around 350°C).
During the annealing cycle under protective atmospheres, the lubricant film volatilizes completely. It breaks down into inert gaseous compounds that are cleanly swept away by the furnace atmosphere, leaving an ash-content of less than 0.01%. This zero-residue performance guarantees compliance with stringent standards such as DIN EN 1057, ensuring perfect surface metallurgical properties.
Key Performance Metrics
| Thermal Boundary Limit: | > 950 °C |
| Decomposition Profile: | Clean Phase Transition |
| Kinematic Viscosity (100°C): | Tailored formulations |
| Application Method: | Spraying, Dripping, or Swabbing |
| Graphite Content: | 0% (No solid buildup) |
Related Technical Resources:
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