Materials & Coatings Guide
Choose the right material and finish for maximum coil longevity. From standard aluminium fins to Heresite-coated copper — matched to your environment.
Not all cooling environments are created equal. From salt-laden air to chemical exposure or high humidity, harsh conditions can dramatically shorten coil life. At HC Coils, we offer a range of construction materials and protective coatings — selected to match your operating conditions, duty and budget.
Fin Materials
| Material | Best For | Notes |
|---|---|---|
| Aluminium | HVAC, indoor, standard duty | Excellent thermal transfer |
| Copper | Aggressive environments | Best performance but higher cost, longer service life |
Protective Coatings
| Coating | Ideal For | Protection Level |
|---|---|---|
| Polyester on Aluminium | Light industrial, humid air, indirect exposure | Basic barrier against moisture/corrosion |
| Heresite on Aluminium or Copper | High-corrosion, coastal, chemical plants | Excellent for aggressive gases and salts |
| Epoxy | Chemical processing, acid/alkali exposure | Resistant to a wide range of acids, solvents and caustic media. Suitable for immersion service. |
| Phenolic | Petrochemical, refinery, high-temperature chemical | Superior chemical and heat resistance (up to 200°C). Excellent for concentrated acids and hydrocarbons. |
| Tin on Copper | Hospital HTM spec, high-humidity | Good protection to copper |
| BlyGold on Aluminium or Copper | Corrosion, coastal, chemical plant fins | Full coil protection after assembly |
| BronzeGlow | General corrosion protection | Full coil protection after assembly |
Process Industry & FDA Compliance
For pharmaceutical, food contact and regulated process applications, we supply coils with materials and documentation to meet your compliance requirements.
- FDA 21 CFR / EC 1935:2004 — Materials suitable for food and pharmaceutical contact applications. Declaration of conformity available on request.
- GMP-Compatible Construction — Smooth internal surfaces, crevice-free joints and cleanable external finishes for pharmaceutical cleanroom and process environments.
- EN 10204 3.1 Certificates — Full material inspection certificates with traceability from raw material to finished product. Supplied as standard for process and pharmaceutical orders.
- PED 2014/68/EU — Pressure-containing components manufactured to PED Categories I–IV with appropriate conformity assessment. Hydrostatic test to 1.5× design pressure.
- ATEX Compatibility — Coolers available with ATEX-certified motors and Ex-rated control panels for classified hazardous areas (Zone 1 and Zone 2).
Casing Materials
- Galvanised Steel (standard) — Economical, suitable for non-corrosive locations.
- Stainless Steel (304/316) — Ideal for food, pharma, washdown or exposed locations.
- Powder Coated Galvanised — Good protection with colour options available.
How to Select the Right Finish
Consider these factors:
- • Is the coil exposed to outdoor air, salt or chemicals?
- • Is cleaning or maintenance frequent or restricted?
- • What is the expected service life?
- • Is thermal efficiency more important than durability?
Still unsure? We're happy to help you balance cost, performance and lifespan for your project.
Talk to Our Engineering Team
Send us your site conditions or system requirements — we'll recommend the right materials and coatings for the job.