Nano Coatings for Heat Exchangers
Suitable for
- Suitable: Thin-film protection where heat transfer must be preserved
- Suitable: New coils coated by dip before shipment
- Suitable: Buyers who ask for test reports, not marketing terms
Not suitable for
- Not suitable: Claims of lifetime protection without a test standard
- Not suitable: Heavily corroded coils — no thin film restores lost metal
- Not suitable: Chemical exposure that needs a thick barrier film
Matches these environments
What the word covers
Sol-gel coatings form an inorganic–organic network from very small particles as they cure. That structure is at the nanometre scale, but the finished film on a coil is typically several micrometres thick. “Nano” describes how the film is built, not how well it protects.
How to evaluate a nano coating
Ask for the same four things you would ask of any coil coating: the dry film thickness range, the salt-spray result with its standard and failure criterion, a heat-transfer test before and after coating, and the cure conditions. A supplier that can only describe the coating as nano, self-cleaning or lifetime-proof has not given you anything to compare.
Related
- CoatingsWaterborne Polysiloxane (Sol-Gel) Coil Coating
- StandardsASTM B117 Neutral Salt Spray: What the Hours Mean
- ComparisonsThin-Film vs Thick-Film Coil Coatings
- GuidesHow to Verify a Supplier's Salt Spray Claims
- StandardsHow Coating Impact on Heat Transfer Is Tested
- GuidesCan a Coating Restore Efficiency on Corroded Coils?
Also see
Is PG-S1 a nano coating?
PG-S1 is a waterborne polysiloxane sol-gel film with a nano-structured hybrid network. We describe it by chemistry, thickness and test results rather than by the word nano.
Can a nano coating be applied to installed equipment?
Some thin films can be sprayed on site, but coverage inside the coil and cure are harder to control than on a dip line before installation.
Tell us the equipment, the site and the destination port. We reply within 24 hours.