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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