Phosphate coating processes provide some of the more difficult challenges in heating. Phosphate coatings are used extensively on lubricated metal parts to provide a thick, porous layer and a grain structure for oil to reside to improve lubricity for gears and threads while protecting against corrosion.
During the phosphate process, a coating builds up on heated surfaces such as electric immersion heaters, restricting heat transfer, causing corrosion and shortening heater life. For this reason, Process Technology developed a purpose-built heater for phosphate chemistries: the DAS-series immersion heater. The DAS-series heaters are designed to last longer in heavy buildup and surface corrosion that normally occurs in these baths. A heavy-wall outer sheath and unique internal construction protects the heater core resulting in a longer life and better performance in harsh phosphate applications.
Benefits
- Longer service life than conventional heater designs.
- Withstands scaling due to a unique construction that reduces localized overheating.
- Extra heavy wall construction resists corrosion.
- Standard low watt density of 23 watts/in² (3.5 w/cm²).
- Rugged moisture resistant steel electrical enclosure to protect wiring.
- Compact design reduces space requirements associated with other derated heaters.
- Replaceable P4 thermal protection for solutions up to 230°F (110°C).
For questions about our Phosphate heaters Email: marketing@process-technology.com
Shared August 14th, 2017
By Connie Dawson, Process Technology